Haydar Y. Hussin (a), Veronica Zumpano (b), Paola Reichenbach (c), Simone Sterlacchini (d), MihaiMicu (b), Cees vanWesten (a), Dan Balteanu (b), 2015, Different landslide sampling strategies in a grid-based bivariate statistical susceptibility model,
Geomorphology (Amst.) 253 (2015). doi_10.1016/j.geomorph.2015.10.030,
DOI: 10.1016%2Fj.geomorph.2015.10.030
Abstract
This study had three aims. The first was to assess the performance ...
This study had three aims. The first was to assess the performance of the weights-of-evidence (WofE) landslide susceptibility model in areas that are very different in terms of size, geoenvironmental settings, and landslide types. The second was to test the appropriate strategies to sample the mapped landslide polygon. The final aim was to evaluate the performance of the method to changes in the landslide sample size used to train the model. The method was applied to two areas_ the Fella River basin (eastern Italian Alps) containing debris flows, and Buzau County (Romanian Carpathians) with shallow landslides. The three landslide sampling strate- gies used were_ (1) the landslide scarp centroid, (2) points populating the scarp on a 50-m grid, and (3) the entire scarp polygon. The highest success rates were obtained when sampling shallow landslides as 50-m grid-points and debris flow scarps as polygons. Prediction rates were highest when using the entire scarp polygon method for both landslide types. The sample size test using the landslide centroids showed that a sample of 104 debris flow scarps was sufficient to predict the remaining 941 debris flows in the Fella River basin, while 161 shallow landslides was the minimum required number to predict the remaining 1451 scarps in Buzau County. Below these landslide sample thresholds, model performance was too low. However, using more landslides than the threshold produced a plateau effect with little to no increase in the model performance rates.
Fiorucci F.; Ardizzone F.; Rossi M.; Torri D., 2015, The use of stereoscopic satellite images to map rills and ephemeral gullies,
Remote sensing (Basel) 7 (2015): 14151–14178. doi_10.3390/rs71014151,
DOI: 10.3390%2Frs71014151
Abstract
Accurate mapping and measurement of erosion channels is necessary to accurately estimate the impact of ...
Accurate mapping and measurement of erosion channels is necessary to accurately estimate the impact of channeled erosion in an area. Field surveys can provide optimal quantitative results, but they are only applicable to small areas. Recently, photogrammetric techniques have been applied to small format aerial photographs that were taken by UAVs. Few studies have applied photogrammetry for mapping and measuring single permanent gullies using very high resolution stereoscopic satellite images. We explore the use of such images to map rills and ephemeral gullies and to measure the length, width and depth of individual erosion channels to estimate the eroded volumes. The proposed methodology was applied to the Collazzone area of Central Italy. All of the channel characteristics were determined using GeoEye-1® panchromatic stereoscopic satellite images of the 48-km2 study area and a 3D floating cursor. We identified, mapped, and measured the lengths of 555 channel segments. The top width and depth could be measured in only a subset of the channel segments (the SMC subset). The SMC data were used to determine the coefficients of the power law relationship between the rill/gully volume and length (V = aLb) and the uncertainties due to the channel depth measurements and the cross-sectional shape. The field data of the rill and gully volumes were within the estimated uncertainty. We defined a decision rule to distinguish rills from gullies on the basis of the segment length and applied the corresponding power law relationship that was derived from the SMC subset to estimate the eroded volume of the entire dataset. The erosion values that were calculated at different scales (0.680 Mg?ha-1 at the catchment scale, 28.4 Mg?ha-1 on the parcels affected by erosion) are consistent with values found in the literature. Our results indicate that erosion at the catchment scale can be considered moderate, whereas the erosion at the field scale exceeds the tolerance limit, which is consistent with data that have been summarized and/or discussed by several authors.
Laviola S., Gabriele S., Levizzani V., Miglietta M. M., Baldini L., Federico S., Marra G.P., Niccoli R., 2015, A prototype system for the analysis and investigation of extreme rainfall events,
2015 EUMETSAT meteorological satellite conference, Toulouse, France, 21-25 September 2015,
Abstract
A prototype system for the analysis and investigation of extreme rainfall events ...
A prototype system for the analysis and investigation of extreme rainfall events
Giordan D.; Manconi A.; Allasia P.; Bertolo D., 2015, Brief Communication_ On the rapid and efficient monitoring results dissemination in landslide emergency scenarios_ The Mont de la Saxe case study,
Natural hazards and earth system sciences (Print) 15 (2015): 2009–2017. doi_10.5194/nhess-15-2009-2015,
DOI: 10.5194%2Fnhess-15-2009-2015
Abstract
Straightforward communication of monitoring results is of major importance in emergency scenarios relevant to large ...
Straightforward communication of monitoring results is of major importance in emergency scenarios relevant to large slope instabilities. Here we describe the communication strategy developed for the Mont de La Saxe rockslide threatening La Palud and Entrèves hamlets in the Courmayeur municipality (Aosta Valley, Italy). Starting from the definition of actions and needs of the landslide management team, including scientists, technicians, civil protection operators, decision makers, and politicians, we show that sharing and disseminating ad hoc information simplifies the understanding of the landslide evolution, as well as the correct communication of the level of criticality.
Daniele Giordan , Andrea Manconi, Dwayne D. Tannant , Paolo Allasia, 2015, UAV: Low-cost remote sensing for high-resolution investigation of landslides,
Geoscience and Remote Sensing Symposium (IGARSS), 2015 IEEE International, pp. 5344–5347, Milano, 26-31/7/2015,
Abstract
The civilian use of small inexpensive mini- and micro-UAVs has increased dramatically in the past ...
The civilian use of small inexpensive mini- and micro-UAVs has increased dramatically in the past few years. UAVs can be used for natural hazards management. In this context, UAVs can be very useful for surveying and monitoring of active small landslides in urban environments. In this paper, a methodology for the data acquisition and processing that considers the landslide typology is presented and discussed. Two case studies from the northwest part of Italy are also described to illustrate the presented methodology.
Anna Facello, Daniele Giordan, Andrea Manconi, 2015, Analysis of snow cover in landslide prone areas_ The example of Tena Valley, Central Pyrenees, Spain,
Geoscience and Remote Sensing Symposium (IGARSS), 2015 IEEE International, pp. 766–769, Milano, 26-29/7/2015,
Abstract
In this work, we analyze the characteristics of snow cover using two space borne products ...
In this work, we analyze the characteristics of snow cover using two space borne products (Level 1C and Level 2A) provided by the SPOT4 Take 5 Initiative. The principal aim of this initiative is to evaluate the benefits of Sentinel 2 acquisition mode before its launch. We processed SPOT4 images acquired from February 2013 to June 2013 over the site of Midi-Pyrénées (South West). The Normalized Difference Snow Index (NDSI) and Fraction of Snow Cover (SCF) are calculated on all dataset and the snow surface map and its evolution over the time is obtained. The distribution of snow cover is slightly larger using the Level 1C than in the Level 2A data. This information will be merged with climatic data and snow depth ground measures in order to derive the melt rate, the snow cover depletion rate and the snow water equivalent, and to analyze the groundwater level variations and their interaction with the landslide activity.
Nigrelli G., Lucchesi S., Fioraso G., Chiarle M., 2015, Clima e ghiacciai nelle Alpi Occidentali italiane_ variabilità ed evoluzione negli ultimi 150 anni,
GEAM. Geoingegneria ambientale e mineraria 52 (2015): 13–22.,
Abstract
Nel presente lavoro vengono analizzate la variabilità climatica e l'evoluzione dei ghiacciai delle Alpi Piemontesi ...
Nel presente lavoro vengono analizzate la variabilità climatica e l'evoluzione dei ghiacciai delle Alpi Piemontesi centro-meridionali dalla fine della Piccola Età Glaciale (PEG) ai giorni nostri. Durante il periodo 1950-2012 le temperature medie mensili riferite ai valori massimi e minimi hanno evidenziato una significativa tendenza all'aumento. Dopo il 1980, i trend positivi sono stati ancor più evidenti ed hanno riguardato soprattutto le temperature minime. Le precipitazioni non hanno mostrato segnali netti, anche se per alcune stazioni si sono osservate diminuzioni statisticamente significative per quanto riguarda il periodo invernale. Dalla fine della PEG al 2006, il numero di ghiacciai si è ridotto notevolmente, passando da 96 a 40 e la riduzione areale è stata di circa il 78%. Il presente lavoro mette in evidenza come l'aumento delle temperature minime agisca sulla riduzione delle aree glacializzate non come unica causa ma come acceleratore di un processo già in atto dalla fine della Piccola Età Glaciale.
S. Critelli, D. Biondino, L. Borrelli, G. Cofone, S. Coniglio, G. Gullà, F. Muto, F. Perri, F. Scarciglia, 2015, I processi di alterazione delle rocce e suscettibilità all’erosione e trasporto,
Tecniche per la difesa dall'inquinamento, pp. 355–382, Guardia Piemontese, 17-20 giugno 2015,
Abstract
È da tempo nota l'incidenza che l'alterazione delle rocce ha sulla stabilità dei versanti, e ...
È da tempo nota l'incidenza che l'alterazione delle rocce ha sulla stabilità dei versanti, e quindi sulla franosità, che risulta essere il predominante meccanismo di evoluzione
morfologica in aree caratterizzate da notevoli spessori di rocce cristalline alterate. I processi di weathering che si mettono in atto dipendono da numerosi fattori quali la chimica e mineralogia delle rocce, il rilievo, le caratteristiche chimiche delle acque interagenti, l'attività biologica e il clima. Il grado di sviluppo dei caratteri dell'alterazione è funzione del tempo e del clima, che controlla anche la tipologia dei processi dominanti. Tali processi inducono nelle rocce cristalline variazioni nelle caratteristiche chimicofisiche, con conseguente formazione di spessori di roccia alterata, più o meno consistenti. Le caratteristiche del materiale roccia e le condizioni di fratturazione dell'ammasso roccioso determinano, in termini generali, i profili di alterazione. La Calabria, in particolare, è una regione con una storia geologica complessa ed estremamente attiva, in cui gli ammassi rocciosi cristallino-metamorfici sono caratterizzati da una condizione di intensa e profonda alterazione, la quale rappresenta uno dei principali fattori di predisposizione agli eventi di dissesto idrogeologico. L'esempio di studio del Massiccio della Sila, i cui studi sul weathering sono stati particolarmente significativi, offre l'opportunità di stimare quantitativamente il grado di alterazione delle rocce cristalline e la loro suscettibilità a movimenti gravitativi, all'erosione e al rapido trasporto, nonché consente di stimare i tassi di erosione del suolo medi annui.
G. Gullà, L. Borrelli, G. Cofone, 2015, Scenari di pericolo,
XIX Conferenza Nazionale ASITA, pp. 437–444, Lecco, 29 settembre-1 ottobre 2015,
Abstract
Gli eventi di frane superficiali possono indurre condizioni di pericolo/rischio molto elevato. Tali condizioni, che ...
Gli eventi di frane superficiali possono indurre condizioni di pericolo/rischio molto elevato. Tali condizioni, che si possono verificare quando è diffusa la presenza di fattori predisponenti le frane superficiali, interessano generalmente aree molto estese e quindi possono interagire con numerosi tratti viari. La ricerca in itinere si propone di definire, con diversi metodi, possibili scenari di pericolo/rischio determinati da eventi di frane superficiali per le reti viarie, con riferimento ad un'area di studio della Stretta di Catanzaro (Calabria). Per le finalità delineate sono stati utilizzati i dati relativi a frane superficiali (SLs) verificatesi nel 2008-2010, nelle litologie prevalentemente
sabbiose (LU-SC) ed argillose (LU-MC). Le informazioni relative alle SLs sono trasferite nelle celle 5x5 m del DTM prodotto dalla carta tecnica regionale. Considerando nella prima fase di lavoro solo i principali fattori predisponenti le SLs cartografate (litologie, inclinazioni e quote), sono individuate le celle potenzialmente instabili suscettibili alle SLs ed il conseguente possibile scenario di pericolo che consente, infine, di individuare i tratti potenzialmente a rischio delle reti viarie. I risultati conseguiti forniscono indicazioni per supportare la gestione di eventuali emergenze, in corso di evento e nella fase post-evento, nonché per la pianificazione di eventuali necessari potenziamenti
delle reti viarie. Gli stessi forniscono, inoltre, spunti per le successive fasi della ricerca.
Cascini L.; Ciurleo M.; Di Nocera S.; Gullà G., 2015, A new-old approach for shallow landslide analysis and susceptibility zoning in fine-grained weathered soils of southern Italy,
Geomorphology (Amst.) 241 (2015): 371–381. doi_10.1016/j.geomorph.2015.04.017,
DOI: 10.1016%2Fj.geomorph.2015.04.017
Abstract
Rainfall-induced shallow landslides involve several geo-environmental contexts and different types of soils. In clayey soils, ...
Rainfall-induced shallow landslides involve several geo-environmental contexts and different types of soils. In clayey soils, they affect the most superficial layer, which is generally constituted by physically weathered soils characterised by a diffuse pattern of cracks. This type of landslide most commonly occurs in the form of multiple-occurrence landslide phenomena simultaneously involving large areas and thus has several consequences in terms of environmental and economic damage. Indeed, landslide susceptibility zoning is a relevant issue for land use planning and/or design purposes.This study proposes a multi-scale approach to reach this goal. The proposed approach is tested and validated over an area in southern Italy affected by widespread shallow landslides that can be classified as earth slides and earth slide-flows. Specifically, by moving from a small (1:100,000) to a medium scale (1:25,000), with the aid of heuristic and statistical methods, the approach identifies the main factors leading to landslide occurrence and effectively detects the areas potentially affected by these phenomena. Finally, at a larger scale (1:5000), deterministic methods, i.e., physically based models (TRIGRS and TRIGRS-unsaturated), allow quantitative landslide susceptibility assessment, starting from sample areas representative of those that can be affected by shallow landslides. Considering the reliability of the obtained results, the proposed approach seems useful for analysing other case studies in similar geological contexts.
R. Schlögel (1), J.-P. Malet (1), A. Remaître (1), P. Reichenbach (2), and C. Doubre (1), 2015, Analysis of a landslide multi-date inventory in a complex mountain landscape_ the Ubaye valley case study,
Natural hazards and earth system sciences (Online) (2015): 2051–2098. doi_10.5194/nhessd-3-2051-2015,
DOI: 10.5194%2Fnhessd-3-2051-2015
Abstract
We propose a methodology (1) to prepare a multi-date landslide inventory for a mountainous area ...
We propose a methodology (1) to prepare a multi-date landslide inventory for a mountainous area affected by several landslide types with different degrees of activity, and (2) to estimate the temporal occurrence and the intensity of the landslides through the analysis of morphological indicators. The inventory, covering the period 1956-2010, is constructed for the middle section of the Ubaye valley (South French Alps) based on the analysis of multi-source documents (geomorphological maps, historical reports of landslide events, field surveys, series of orthophotographs and SAR satellite images). The uncertainties in the interpretation of the documents and the landslide morphological features are taken into account in relation to the scale of the source documents.
Several morphological indicators are calculated to describe quantitatively the evolution of the landslides (length, area, relative elevation, runout distance). Frequency-area density functions are calculated to estimate the changes in the landslide distributions. A Poisson model is used to estimate the probability of reactivation of the observed landslides. The proposed multi-date inventory and the associated statistics give additional information to the event catalogue managed by local authorities.
Polemio Maurizio (Responsabile Scientifico), Limoni Pier Paolo, Romanazzi Andrea, Zuffianò Livia Emanuela, 2015, Studio idrogeologico per l’analisi di rischio per la discarica sita in località Contrada Martucci, comune di Conversano (Bari) – III Relazione Tecnica di progresso,
2015,
Abstract
La società "Progetto Gestione Bacino Bari Cinque s.r.l." ha affidato
all'Istituto di Ricerca per la Protezione ...
La società "Progetto Gestione Bacino Bari Cinque s.r.l." ha affidato
all'Istituto di Ricerca per la Protezione Idrogeologica del CNR (CNR-IRPI) la
redazione dello studio idrogeologico per l'analisi di rischio del sito in cui è
collocata la discarica della medesima società, posta in località Contrada
Martucci, comune di Conversano (Bari). Il sito in oggetto dista circa 4,5 km in
direzione nord-ovest dall'abitato di Conversano. Nel sito ricade l'impianto per il
trattamento e lo smaltimento di rifiuti solidi urbani della Società Progetto
Ambiente Bacino Bari Cinque s.r.l..
Lo studio è svolto dal personale dell'Unità Organizzativa di Supporto di
Bari del CNR IRPI, sotto la responsabilità scientifica del Dott. Maurizio Polemio
La presente relazione illustra, in modo sintetico, i risultati del terzo ciclo di
campionamento delle acque di falda effettuato da CNR-IRPI. L'attenzione è
posta sui dati direttamente acquisiti in sito dal CNR-IRPI e, in generale, è data
alla descrizione delle attività di sito.
Il campionamento delle acque sotterranee ha interessato 11 pozzi di
proprietà pubblica e privata, ubicati nell'intorno delle discarica, sia a valle che a monte (1) della stessa, in un area di circa 25 km2.
Vittoria Dragone, Marco Muciaccia, Alessia Basso, Luciano Ciciretti, Mauro Palombella, Maurizio Polemio, 2015, Una molteplicità di approcci a supporto della mitigazione dei rischi idrogeologici perseguita dai Consorzi di Bonifica (Gargano, Puglia),
Le Giornate dell'Idrologia, Perugia, 6-8 ottobre 2015,
Abstract
Il Progetto GarganoLab ovvero "Sistema informativo integrato per la gestione del territorio, il monitoraggio ambientale ...
Il Progetto GarganoLab ovvero "Sistema informativo integrato per la gestione del territorio, il monitoraggio ambientale ed allerta di emergenza", finanziato dalla Regione Puglia grazie alle misure "Living Labs", è stato concepito dal consorzio tra le imprese Staer Sistemi, W-Enterprise e Gemict a supporto della domanda di innovazione tecnologica del Consorzio di Bonifica Montana del Gargano (CBMG), al fine di perseguire la riduzione dei rischi idrogeologici e l'ottimale gestione delle opere di mitigazione. La nota descrive il contributo offerto in particolare dal partner di progetto, il Laboratorio di Idrologia del CNR-IRPI.
Il progetto ha perseguito la mitigazione dei rischi naturali, dovuti a frane e, soprattutto, piene, e gli effetti della siccità nel territorio del Consorzio di Bonifica Montana del Gargano, con maggiore dettaglio nelle zone più esposte, come il bacino idrografico Molinella di Vieste, drammaticamente interessato anche dal più recente evento alluvionale, occorso nel Gargano dall'1 al 6/9/2014.
Francesca Santaloia, Vittoria Dragone, Pier Paolo Limoni, Andrea Romanazzi, Livia Emanuela Zuffianò, Maurizio Polemio (Responsabile Scientifico), 2015, II Technical Report of progress -Checklist,
2015,
Abstract
This Technical Report is a part of the activities realised for the Cooperation Covenant ...
This Technical Report is a part of the activities realised for the Cooperation Covenant "Formulation of a framework to guide the development of a numerical groundwater model to estimate the sustainable yield of the main sea level aquifer system", agreed between the Research Institute for Geo-Hydrological Protection (Istituto di Ricerca per la Protezione Idrogeologica) of the Italian National Research Council (Consiglio Nazionale delle Ricerche, CNR), thereinafter CNR IRPI, and the Maltese Sustainable and Water Conservation Unit of Ministry for Energy and Health, thereinafter SEWCU. SEWCU within the Ministry for Energy and Health is currently undertaking the development of Malta's 2nd River Basin Management Plan under the implementation process of the EU's Water Framework Directive. This process will identify a set of measures addressing the qualitative and quantitative status of groundwater, with the aim of ensuring the achievement of good status for the resource. The achievement of good quantitative status is assessed by means of a water balance calculation, which compares inputs and outputs from the groundwater system. The system inputs define the sustainable yield of the particular groundwater system, where for the achievement of good status system outputs must not exceed this sustainable level. The final purpose of the cooperation will be the numerical modelling of the Maltese coastal aquifer system to permit the sustainable management of groundwater resources considering the effects of climate change, including the variability of recharge, sea level and seawater salinity. The process could be utilised to define reliable figures for the safe-yield from these aquifers and the establishment of annual groundwater abstraction thresholds or optimal discharge schema utilising scientific up-to-date methodological approaches.
Stefano Luigi Gariano (1,2), Olga Petrucci (3), Fausto Guzzetti (1), 2015, Changes in the occurrence of rainfall-induced landslides in Calabria, southern Italy, in the 20th century,
Natural hazards and earth system sciences (Online) 15 (2015): 2313–2330. doi_10.5194/nhess-15-2313-2015,
DOI: 10.5194%2Fnhess-15-2313-2015
Abstract
Only a few studies have investigated the geographical and temporal variations in the frequency and ...
Only a few studies have investigated the geographical and temporal variations in the frequency and distribution of rainfall-induced landslides, and the consequences of the variations on landslide risk. Lack of information limits the possibility to evaluate the impact of environmental and climate changes on landslide frequency and risk. Here, we exploit detailed historical information on landslides and rainfall in Calabria, Southern Italy, between 1921 and 2010 to study the temporal and the geographical variation in the occurrence of rainfall-induced landslides and in their impact on the population. We exploit a catalogue with information on historical landslides from June 1920 to December 2010, and daily rainfall records obtained by a network of 318 rain gauges in the same period, to reconstruct 448,493 rainfall events (RE). Combining the rainfall and the landslide information, we obtain a catalogue of 1466 rainfall events with landslides (REL), where a REL is the occurrence of one or more landslide during or immediately after a rainfall event. We find that (i) the geographical and the temporal distributions of the rainfall-induced landslides have changed in the observation period, (ii) the monthly distribution of the REL has changed in the observation period, and (iii) the average and maximum cumulated event rainfall that have resulted in landslides in the recent 30-year period 1981 - 2010 are lower than the rainfall necessary to trigger landslides in previous periods, whereas the duration of the RE that triggered landslides has remained the same. We attribute the changes to variations in the rainfall conditions and to an increased vulnerability of the territory. To investigate the variations in the impact of REL on the population, we compared the number of REL in each of the 409 municipalities in Calabria, with the size of the population in the municipalities, measured by national Censuses conducted in 1951, 1981, and 2011. We adopted two strategies; the first strategy considered impact as IREL = #REL / P, and the second strategy measured impact as RREL = #REL × P, where #REL is the total number of REL in a period, and P is the size of the population in the same period and geographical area. The analysis has revealed a complex picture of changes in the impact of rainfall-induced landslides in Calabria in the recent past, with areas where IREL and RREL have increased, and other areas where they have decreased. Municipalities where IREL has increased are mainly in the mountains, and municipalities where RREL has increased are mainly along the coasts. The complexity of the changes in the frequency and impact of rainfall-induced landslides observed in Calabria suggests that it remains difficult and uncertain to predict the possible variations in the frequency and impact of landslide in response to future climatic and environmental changes.
Trizzino Rosamaria, 2015, Le Grandi Frane della Città del Vasto,
, pp. 9–10. Vasto_ Cannarsa Editoria-grafica, 2015,
Abstract
Molto interessante è l'analisi storica che Daniele Taddei propone in queste pagine, fornendo una ...
Molto interessante è l'analisi storica che Daniele Taddei propone in queste pagine, fornendo una visione d'insieme ed una "lettura esperta" degli eventi franosi che hanno ripetutamente e pesantemente colpito il territorio della Città del Vasto. Di particolare interesse e valenza scientifica è la ricostruzione del modello geologico-evolutivo del versante orientale di Vasto, a partire dal Pleistocene medio (250.000 anni fa), quando ha avuto inizio l'emersione del territorio vastese. L'analisi degli step evolutivi del versante, correlati alle curve eustatiche di variazione del livello del mare e dell'insolazione del settore adriatico, rappresenta un risultato innovativo e originale, basato su solide argomentazioni scientifiche, che risulta fondamentale per la comprensione dei meccanismi alla base dei fenomeni di frana che oggi flagellano questo territorio.
Caprioli Mauro, Trizzino Rosamaria, 2015, Esperienze di rilievi UAV per la prevenzione del rischio ambientale,
XIX Conferenza Nazionale ASITA, pp. 215–216, Lecco (Italy), 29 settembre-1 ottobre 2015,
Abstract
Nel presente lavoro vengono esposti i risultati di alcuni rilievi effettuati con sistema UAV in ...
Nel presente lavoro vengono esposti i risultati di alcuni rilievi effettuati con sistema UAV in due
zone del territorio pugliese, affette da gravi problematiche ambientali. I rilievi sono stati
eseguiti con un "esacottero" munito di fotocamera CANON EOS 550D e sistema di
posizionamento satellitare GNSS. Nel primo caso il rilievo è stato effettuato su una torre di
avvistamento aragonese in una zona costiera di grande interesse per il patrimonio
artistico-culturale della regione Puglia, in località San Vito, Polignano a Mare (Bari).
Successivamente, è stato eseguito il rilievo di un tratto di costa rocciosa del Salento
(Puglia meridionale), affetta da gravi rischi ambientali dovuti al possibile crollo di
elementi rocciosi, denominati "falesie". L'elevata accuratezza delle immagini ottenute dal rilievo
ed elaborate con Agisoft Photoscan ha permesso di individuare elementi fondamentali per la
caratterizzazione e l'analisi della stabilità di ciascun sito.
Petrucci O., Caloiero T., Aceto L., Pasqua A.A., 2015, Assessment of severity levels of Damaging Hydrogeological Events in Calabria (Southern Italy),
IUGG 2015 - Symposium HW06 Socio-Hydrology: The Dynamic Interplay between Water and Human Systems, Praga, 22/06-02/07/2015,
Abstract
A Rainfall Event and a subsequent Damage Event, resulting from floods and landslides triggered by ...
A Rainfall Event and a subsequent Damage Event, resulting from floods and landslides triggered by rainfall, are the two components which characterize a Damaging Hydrogeological Event (DHE). Since the same rainfall amount can cause different degrees of damage, depending on both rivers and slopes conditions, both Rainfall and Damage Event characteristics are related to climatic, geomorphological and anthropogenic factors. Moreover, as to what concerns the damage, and specifically the damage occurrence, this also depends on the geographical distribution of damageable elements such as population, lifelines and urbanized sectors.
In this paper, a methodology for the classification of the severity of the DHEs, which have been recorded in a region of southern Italy (Calabria), is proposed. The applied methodology was based on a chart which considers some indicators of both the Damage (Dscore) and the daily Rainfall values (Rscore) recorded in the study area; the chart was applied to a series of 30 DHEs which occurred between 1981 and 2010. As a result, four types of events have been identified_ ordinary events, obtained by low Dscore and Rscore values; extraordinary events, with high Rscore values but low Dscore values; catastrophic events, characterized by non-exceptional rainfall (low Rscore) and severe damage (high Dscore); major catastrophic events, having high Dscore and Rscore values. Given that, media accounts and first or second-hand personal accounts fail to provide an objective classification, the aim of this study was to provide an objective classification of the severity of the DHEs through the production of a chart.
Caprioli M., Trizzino R. , Pagliarulo R., Scarano M., Mazzone F., Scognamiglio A., 2015, MANAGEMENT OF ENVIRONMENTAL RISKS IN COASTAL AREAS,
ISPRS Geospatial Week 2015, edited by S. Zlatanova, G. Sithole, M. Nakagawa, and Q. Zhu, pp. 263–268. London_ ISPRS Council - London, 2015,
Abstract
The present work deals with the assessment and management of environmental risk conditions in a ...
The present work deals with the assessment and management of environmental risk conditions in a
typical costal area of Southern
Italy. This area, located in the Salento peninsula, is subject to recurrent widespread instability
phenomena due to the presence of steep rocky cliffs. Along the coast there are numerous beach
resorts that are very crowded in the summer season. The environmental hazard deriving from the
possible rock falls is unacceptably high for the people safety. Moreover, the land-based mapping of
the dangerous natural structures is very difficult and time and resources expending. In this
context, we carried out an UAV survey along about 1 km of coast, near the towns of San Foca, Torre
dell'Orso and Sant' Andrea ( Lecce, Southern Italy). The UAV platform was equipped with a
photogrammetric measurement system that allowed us to obtain a mobile mapping of the fractured
fronts of dangerous rocky cliffs. UAV-images data have been processed using dedicated software
(Agisoft Photoscan). The total error obtained was of centimeter-order that is a very satisfactory
result. The environmental information has been arranged in an ArcGIS platform in order to assess
the risk levels. The possibility to repeat the survey at time intervals more or less close together
depending on the measured levels of risk and to compare the output allows following the trend of
the dangerous phenomena. In conclusion, for inaccessible locations of dangerous rocky bodies the
UAV survey coupled with a GIS methodology proved to be a key engineering tool for the management of
environmental risks.
Olga Petrucci (1), Luigi Aceto (1); Montserrat Llasat-Botija (2), A. Aurora Pasqua (1), Joan Rosselló, (3), Maria Carmen Llasat (2), 2015, Causes and effects of the 2010 March damaging hydrogeological event in Catalonia, Calabria and Balearic Islands,
9th HyMeX Workshop, Mykonos Island, Greece, 21 - 25 September 2015,
Maria Carmen Llasat (1), Vassiliki Kotroni (2), Kostas Lagouvardos (2), Olga Petrucci (3), Joan Rosselló (4), Freddy Vinet (5), Montserrat Llasat-Botija (1), Katerina Papagiannaki (2), A. Aurora Pasqua (3), 2015, Building a platform to show the flood events recorded in the Mediterranean area,
9th HyMeX Workshop, Mykonos Island, Greece, 21 - 25 September 2015,
A. Longobardi, G. Buttafuoco, T. Caloiero, R. Coscarelli, 2015, Analysis of the precipitation regime in a wide Mediterranean area,
Rome 2015 - Science Symposium on climate, pp. 80–81, Roma, November 19-20, 2015,
Abstract
The precipitation climate regime of a region is characterized by the distribution of the monthly ...
The precipitation climate regime of a region is characterized by the distribution of the monthly precipitation contribution. Its temporal and spatial analysis is of particularly interest for many fields of applied sciences, such as climatology, hydrology and water resources management especially in arid or semi-arid environment [1, 2]. With the aim to describe the climate regime, its spatial feature and relevant potential temporal shift, for a large area of southern Italy (Mediterranean basin), a database of about 559 stations, has been explored through the statistical analysis of rainfall time series spanning between 1917-2006. After a change point analysis, aimed at the assessment of data quality, a trend analysis has been performed on both monthly precipitation, monthly percentage of annual rainfall amount and Precipitation Concentration Index (PCI) series [3]. The broad extension of the area under investigation highlights a better understanding of precipitation distribution patterns over space, illustrating how particular geographical location are characterized by climatic features apart from the average climate regime predicted for a particular period of the year [4,5]. Results of PCI trend analysis indicate a significant shift, for about 40%-50% of total gauging station, over the time toward a more uniform climate regime, especially for the hilly areas. Results of monthly rainfall series trend analysis further indicate that the shift is produced by a reduction of rainfall amount during the winter season, particular consistent over the Tyrrhenian side of the peninsula, and an increase during the summer season quite widespread over the whole investigated territory [6].
Taylor, Faith E and Malamud, Bruce D and Santangelo, Michele and Marchesini, Ivan and Guzzetti, Fausto, 2015, Statistical Patterns of Triggered Landslide Events and their Application to Road Networks,
egu 2015, Vienna, 12-17 april 2015,
Abstract
In the minutes to weeks after a landslide trigger such as an earthquake or heavy ...
In the minutes to weeks after a landslide trigger such as an earthquake or heavy rainfall, as part of a triggered landslide event, one individual to tens of thousands of landslides may occur across a region. If in the region, one or more roads become blocked by landslides, this can cause extensive detours and delay rescue and recovery operations. In this paper, we show the development, application and confrontation with real data of a model to simulate triggered landslide events and their impacts upon road networks. This is done by creating a 'synthetic' triggered landslide event inventory by randomly sampling landslide areas and shapes from already established statistical distributions. These landslides are then semi-randomly dropped across a given study region, conditioned by that region's landslide susceptibility. The resulting synthetic triggered landslide event inventory is overlaid with the region's road network map and the number, size, location and network impact of road blockages and landslides near roads calculated. This process is repeated hundreds of times in a Monte Carlo type simulation. The statistical distributions and approaches used in the model are thought to be generally applicable for low-mobility triggered landslides in many medium to high-topography regions throughout the world. The only local data required to run the model are a road network map, a landslide susceptibility map, a map of the study area boundary and a digital elevation model. Coupled with an Open Source modelling approach (in GRASS-GIS), this model may be applied to many regions where triggered landslide events are an issue. We present model results and confrontation with observed data for two study regions where the model has been applied_ Collazzone (Central Italy) where rapid snowmelt triggered 413 landslides in January 1997 and Oat Mountain (Northridge, USA), where the Northridge Earthquake triggered 1,356 landslides in January 1994. We find that when the landslide susceptibility map is adjusted along road corridors to take into account interactions between landslides and roads, the model reasonably well matches the two observed results. In Collazzone (length of road = 153 km, landslide density = 5.2 landslides km-2), the median number of road blockages over 100 model runs was 5.0 (±2.5 s.d.), compared to the observed number of 5 road blocks. In Northridge (length of road = 780 km, landslide density = 8.7 landslides km-2), the median number of road blockages over 100 model runs was 28.0.* (±14.4 s.d.) compared to the observed number of 48.0 road blocks. We are now working on applying the model to other locations and developing more sophisticated network impact analysis tools to improve the applicability of the model.
Salvati, Paola and Pernice, Umberto and Bianchi, Cinzia and Fiorucci, Federica and Marchesini, Ivan and Guzzetti, Fausto, 2015, Approaches to communication in response to geo-hydrological risk_ POLARIS an Italian web initiative.,
EGU General Assembly 2015, vienna, 12-17 april 2015,
Abstract
In the contemporary information and knowledge-based society, communication can foster effective responses to geo-hydrological risks, ...
In the contemporary information and knowledge-based society, communication can foster effective responses to geo-hydrological risks, by increasing awareness on the causes and consequences of specific hazards, e.g., landslides, debris flows, and floods, and by fostering the capacity of individuals, groups, and organizations to prepare, manage and recover from geo-hydrological events. In this context, communication plays a vital role in all phases of the disaster cycle. Although in the last few years the scientific community has begun to disseminate information on geo-hydrological hazards and the associated risks through thematic websites, these remain mainly addressed to experts for specific technical purposes with contents and web interfaces hardly appreciated by a wider audience and rarely synchronised with social networks. To address the problem posed by the lack of communication on geo-hydrological hazards with potential human consequence in Italy, we designed the POLARIS Web site. The initiative we are conducting has the main object of contributing, in different ways and at different geographical scales, to raise awareness about landslides and floods, and their impact on the Italian society. The website is structured into six main sections (i.e. Reports, Are you ready, Events, Alert Zones, Focus and Blog) that provide different and complementary information including, respectively_ periodical reports on landslide and flood risk to the population of Italy, suitable behaviors to adopt during damaging events, data and analyses on specific events, visual and detailed info on damaging events of the Italian Alert Zones defined by the Civil Protection Authority and blog-posts on landslide and flood events encouraging citizens' participation to crowd-sourcing information. Consultants experienced in project management, web-communication strategies on natural hazards, info-graphics, and user experience design were involved in the initiative to arrange and publish the information, considering usability and accessibility of the website, and key graphic aspects of web 2.0 information, making the web site communication more effective to users pertaining to diversified audiences. Specific icons are designed to describe the geo-hydrological events and maps to visualize their impact on the territory. The scientific and technical contents are edited using appropriate communication strategies which adopt a less technical and more widely comprehensible language, using intuitive and engaging web interfaces and linking messages to social media that encourage citizens' interactions. Monitoring the access of users to the website during more than a year after its publication, we noticed how the majority of the access corresponds to the occurrence of the worst geo-hydrological events and, in particular, when journalists or scientists promoted the website through television. Such a positive effect on the growth of users access suggested us to enhance our collaboration with scientific journalists by linking traditional (i.e. TV) and social media to further enlarge the awareness of website and to better explain users how to use the website information for increasing their resilience to geo-hydrological hazards.
Marchesini, Ivan and Mergili, Martin and Schneider-Muntau, Barbara and Alvioli, Massimiliano and Rossi, Mauro, 2015, Physically-based landslide susceptibility modelling_ geotechnical testing and model evaluation issues,
EGU General Assembly 2015, vienna, 12-17 april 2015,
Abstract
We used the software r.slope.stability for physically-based landslide susceptibility modelling in the 90 km2 Collazzone
area, ...
We used the software r.slope.stability for physically-based landslide susceptibility modelling in the 90 km2 Collazzone
area, Central Italy, exploiting a comprehensive set of lithological, geotechnical, and landslide inventory data.
The model results were evaluated against the inventory.
r.slope.stability is a GIS-supported tool for modelling shallow and deep-seated slope stability and slope failure
probability at comparatively broad scales. Developed as a raster module of the GRASS GIS software,
r.slope.stability evaluates the slope stability for a large number of randomly selected ellipsoidal potential sliding
surfaces. The bottom of the soil (for shallow slope stability) or the bedding planes of lithological layers (for
deep-seated slope stability) are taken as potential sliding surfaces by truncating the ellipsoids, allowing for the
analysis of relatively complex geological structures. To take account for the uncertain geotechnical and geometric
parameters, r.slope.stability computes the slope failure probability by testing multiple parameter combinations
sampled deterministically or stochastically, and evaluating the ratio between the number of parameter combinations
yielding a factor of safety below 1 and the total number of tested combinations. Any single raster cell may be
intersected by multiple sliding surfaces, each associated with a slope failure probability. The most critical sliding
surface is relevant for each pixel.
Intensive use of r.slope.stability in the Collazzone Area has opened up two questions elaborated in the present
work_
(i) To what extent does a larger number of geotechnical tests help to better constrain the geotechnical characteristics
of the study area and, consequently, to improve the model results? The ranges of values of cohesion and angle
of internal friction obtained through 13 direct shear tests corresponds remarkably well to the range of values suggested
by a geotechnical textbook. We elaborate how far an increased number of tests may help to further improve
the geotechnical parameterization of the model and, consequently, how much effort and resources should be put
into geotechnical sampling and testing for physically-based landslide susceptibility modelling.
(ii) What is the spatial unit most suitable to discretize landslide susceptibility maps? Whilst the GIS pixel is
the most commonly used level of discretization, slope units represent a valid alternative. Tests have shown that
the area under the ROC curve increases significantly when evaluating the slope failure probabilities yielded with
r.slope.stability at the level of slope units instead of pixels. At the level of slope units, the physically-based model
r.slope.stability outperforms statistical models applied to the Collazzone Area. However, there is good reason to
discuss the validity and the usefulness of different levels of discretization.
Marchesini, Ivan and Rossi, Mauro and Balducci, Vinicio and Salvati, Paola and Guzzetti, Fausto and Bianchini, Andrea and Grzeleswki, Emanuell and Canonico, Andrea and Coccia, Rita and Fiorucci, Gianni Mario and others, 2015, High-school software development project helps increasing students’ awareness of geo-hydrological hazards and their risks,
EGU General Assembly 2015, vienna, 12-17 april 2015,
Abstract
In Italy, inundation and landslides are widespread phenomena that impact the population and cause significant ...
In Italy, inundation and landslides are widespread phenomena that impact the population and cause significant economic damage to private and public properties. The perception of the risk posed by these natural geo-hydrological hazards varies geographically and in time. The variation in the perception of the risks has negative consequences on risk management, and limits the adoption of effective risk reduction strategies. We maintain that targeted education can foster the understanding of geo-hydrological hazards, improving their perception and the awareness of the associated risk. Collaboration of a research center experienced in geo-hydrological hazards and risks (CNR IRPI, Perugia) and a high school (ITIS Alessandro Volta, Perugia) has resulted in the design and execution of a project aimed at improving the perception of geo-hydrological risks in high school students and teachers through software development. In the two-year project, students, high school teachers and research scientists have jointly developed software broadly related to landslide and flood hazards. User requirements and system specifications were decided to facilitate the distribution and use of the software among students and their peers. This allowed a wider distribution of the project results. We discuss two prototype software developed by the high school students, including an application of augmented reality for improved dissemination of information of landslides and floods with human consequences in Italy, and a crowd science application to allow students (and others, including their families and friends) to collect information on landslide and flood occurrence exploiting modern mobile devices. This information can prove important e.g., for the validation of landslide forecasting models.
Marchesini, I. and Santangelo, M. and Guzzetti, F. and Cardinali, M. and Bucci, F., 2015, Assessing the influence of morpho-structural setting on landslide abundance,
Georisk (Online) (2015). doi_10.1080/17499518.2015.1058956,
DOI: 10.1080%2F17499518.2015.1058956
Abstract
Knowing the factors that influence landslide abundance and distribution is important to evaluate landslide susceptibility ...
Knowing the factors that influence landslide abundance and distribution is important to evaluate landslide susceptibility and hazard. Visual interpretation of aerial photographs (API) can be used to collect spatially distributed information on bedding attitude (BA), in an area. Where a map of the location of bedding traces (BTs), i.e. lines showing the intersection of bedding planes with the local topography, is available, the map can be used to obtain BA point data and to prepare maps showing morpho-structural domains. The possibility of using BA maps to investigate the influence of morpho-structural settings on landslide abundance is hampered by the lack of understanding of the influence of the length of the BTs, and of the parameters used to interpolate the BA data on the structural zonation. To investigate the problem, we used information on 207 BTs obtained through API in the Collazzone area, Central Italy, and we prepared 150 maps showing BA information. This was accomplished using 15 different values for the segmentation length of the BTs (S), and 10 different values for the tension parameter (T) used for the interpolation. We compare the results against previous results obtained for the same area adopting a heuristic approach to the segmentation of the same set of BTs. Next, we compare the geographical distribution of old deep-seated, deep-seated and shallow landslides in five morpho-structural domains in the study area, and we analyse the influence of the structural settings on the abundance of the different types of landslides
Santangelo, M. and Marchesini, I. and Bucci, F. and Cardinali, M. and Fiorucci, F. and Guzzetti, F., 2015, An approach to reduce mapping errors in the production of landslide inventory maps,
Natural hazards and earth system sciences (Print) 15 (2015): 2111–2126. doi_10.5194/nhess-15-2111-2015,
DOI: 10.5194%2Fnhess-15-2111-2015
Abstract
Landslide inventory maps (LIMs) show where
landslides have occurred in an area, and provide information
useful to ...
Landslide inventory maps (LIMs) show where
landslides have occurred in an area, and provide information
useful to different types of landslide studies, including
susceptibility and hazard modelling and validation, risk assessment,
erosion analyses, and to evaluate relationships between
landslides and geological settings. Despite recent technological
advancements, visual interpretation of aerial photographs
(API) remains the most common method to prepare
LIMs. In this work, we present a new semi-automatic procedure
that makes use of GIS technology for the digitization
of landslide data obtained through API. To test the procedure,
and to compare it to a consolidated landslide mapping
method, we prepared two LIMs starting from the same set of
landslide API data, which were digitized (a) manually adopting
a consolidated visual transfer method, and (b) adopting
our new semi-automatic procedure. Results indicate that the
new semi-automatic procedure (a) increases the interpreter's
overall efficiency by a factor of 2, (b) reduces significantly
the subjectivity introduced by the visual (manual) transfer
of the landslide information to the digital database, resulting
in more accurate LIMs. With the new procedure, the
landslide positional error decreases with increasing landslide
size, following a power-law. We expect that our work will
help adopt standards for transferring landslide information
from the aerial photographs to a digital landslide map, contributing
to the production of accurate landslide maps.
Polemio Maurizio (Responsabile Scientifico)
Romanazzi Andrea
Zuffianò Livia Emanuela
Limoni Pier Paolo, 2015, STUDIO IDROGEOLOGICO PER L’ANALISI DI RISCHIO PER LA DISCARICA SITA IN LOCALITÀ CONTRADA MARTUCCI, COMUNE DI CONVERSANO (BARI) – II Relazione Tecnica di progresso,
2015,
Abstract
L'Istituto di Ricerca per la Protezione Idrogeologica del CNR (CNR-IRPI) ha assunto il compito della ...
L'Istituto di Ricerca per la Protezione Idrogeologica del CNR (CNR-IRPI) ha assunto il compito della redazione dello studio idrogeologico di base per l'analisi di rischio del sito in cui è collocata una discarica posta in località Contrada Martucci, comune di Conversano (Bari). Il sito in oggetto dista circa 4,5 km in direzione nord-ovest dall'abitato di Conversano. Nel sito ricade l'impianto per il trattamento e lo smaltimento di rifiuti solidi urbani della Società Progetto Ambiente Bacino Bari Cinque s.r.l..
La presente relazione illustra, in modo sintetico, i risultati del secondo ciclo di campionamento delle acque di falda effettuato da CNR-IRPI. L'attenzione è posta sui dati direttamente acquisiti in sito dal CNR-IRPI e, in generale, è data alla descrizione delle attività di sito. Si integra la relazione con alcune elaborazioni geochimiche di natura grafica di alcuni parametri determinati dai laboratori che hanno analizzato i campioni prelevati da CNR-IRPI che ne confermano la validità.
Il campionamento delle acque sotterranee ha interessato 12 pozzi di proprietà pubblica e privata, ubicati nell'intorno delle discarica sia a valle che a monte della stessa in un area di circa 25 km2.
Lucía A., Comiti F. Borga M., Cavalli M., Marchi L., 2015, Dynamics of large wood during a flash flood in two mountain catchments,
Natural hazards and earth system sciences (Online) 15 (2015): 1741–1755. doi_10.5194/nhess-15-1741-2015,
DOI: 10.5194%2Fnhess-15-1741-2015
Abstract
Understanding and modelling the dynamics of
large wood (LW) in rivers during flood events has spurred
a ...
Understanding and modelling the dynamics of
large wood (LW) in rivers during flood events has spurred
a great deal of research in recent years. However, few studies
have documented the effect of high-magnitude flash floods
on LW recruitment, transport and deposition. On 25 October
2011, the Magra river basin (north-western Italy) was
hit by an intense rainstorm, with hourly rainfall rates up to
130mmh/1 and event rain accumulations up to 540mm in
8 h. Such large rainfall intensities originated flash floods in
the main river channels and in several tributaries, causing
severe damages and loss of lives. Numerous bridges were
partly or fully clogged by LW jams. A post-flood survey was
carried out along the channels of two catchments that were
severely and similarly affected by this event, the Gravegnola
(34.3 km2) and Pogliaschina (25.1 km2). The analysis highlighted
a very relevant channel widening in many channel
reaches, which was more marked in the Gravegnola basin
due to highly erodible material forming the slopes adjacent
to the fluvial corridor. Large wood recruitment rates were
very high, up to 1270 m3 km-1, and most of it (70-80 %) was
eroded from the floodplains as a consequence of channelwidening
processes, while the rest came from hillslopes processes.
Overall, drainage area and channel slope are the most
relevant controlling variables in explaining the reach-scale
variability of LW recruitment, whereas LW deposition appears
to be more complex, as correlation analysis did not evidence
any statistically significant relationship with the tested
controlling variables. Indeed, in-channel LW displacement
during the flood has been mostly limited by the presence of
bridges, given the relatively large width attained by channels
after the event.
Mauro CAPRIOLI*, Francesco MANCINI**, Francesco MAZZONE***, Mario Scarano***, Rosamaria TRIZZINO****, 2015, UAV Surveys for Representing and Document the Cultural Heritage,
Le Vie dei Mercanti _ XIII Forum Internazionale di Studi - HERITAGE and TECHNOLOGY Mind Knowledge Experience, pp. 476–483, Aversa-Capri, Italy, 11-13 June, 2015,
Abstract
The new survey techniques allow for a more detailed depiction of the characteristics of the ...
The new survey techniques allow for a more detailed depiction of the characteristics of the cultural heritage of which our country is so rich. Unmanned Aerial Vehicles (UAV) are emerging as a key engineering tool for future environmental survey tasks. UAV aerial imagery offers both timely (on demand) and more detailed (higher resolution) information than comparable satellite imagery. In the present study the opportunities of obtaining more detailed documentation of cultural goods throughout UAV survey have been investigated. The survey was conducted on an ancient Aragonese watchtower of the seventeenth century, located near the Abbey of San Vito in the countryside of Polignano a Mare (in the province of Bari, Southern Italy) (Fig.1). The high resolution of the produced images, approximately 1 cm x pixels, allows to obtain all elements of both structural and qualitative information required for a conservative restoration project of the monument. The peculiarity of the transportation vehicle of the camera has also made it possible to detect the top surface of the roof covering of the building, normally not accessible, with the presence of a chimney and an access hatch, on which to intervene for the proper disposal of rainwater. The research refers to the metric characteristics, accuracy, level of detail, the particular crack patterns, etc., reachable by photogrammetric methods, with the help of dedicated software (PHOTOSCAN) comparable with the methodologies of Computer Vision.
fausto Guzzetti, 2015, Competenze e responsabilità: un problema aperto,
2015,
Abstract
Per combattere il dissesto occorre uscire dalla logica dell'emergenza, con prospettive di lungo periodo basate ...
Per combattere il dissesto occorre uscire dalla logica dell'emergenza, con prospettive di lungo periodo basate su regole certe e condivise e su una volonta? collettiva di farle rispettare. Devono anche allargarsi le competenze necessarie per la pianificazione e gestione del territorio.
Fausto Guzzetti, 2015, Previsione operativadelle frane_ il sistema SANF,
2015,
Abstract
PER SUPPORTARE IL CENTRO FUNZIONALE NAZIONALE DI PROTEZIONE CIVILE, CNR-IRPI HA SVILUPPATO UN SISTEMA DI ...
PER SUPPORTARE IL CENTRO FUNZIONALE NAZIONALE DI PROTEZIONE CIVILE, CNR-IRPI HA SVILUPPATO UN SISTEMA DI ALLERTAMENTO NAZIONALE PER LA POSSIBILE OCCORRENZA DI FENOMENI FRANOSI INDOTTI DA PIOGGE. LE CARATTERISTICHE TECNICHE E OPERATIVE DEL SISTEMA SANF, UTILIZZATO DAL 2009.
Fausto Guzzetti, 2015, Statistica e modellisticaper valutare il rischio frane,
2015,
Abstract
VALUTARE IL RISCHIO DA FRANA E? OPERAZIONE COMPLESSA. LA VALUTAZIONE DELLA SUSCETTIBILITA? DI FRANE DI ...
VALUTARE IL RISCHIO DA FRANA E? OPERAZIONE COMPLESSA. LA VALUTAZIONE DELLA SUSCETTIBILITA? DI FRANE DI SCORRIMENTO SI PUO? AVVALERE DI METODI STATISTICI BASATI SU VARIABILI GEO-AMBIENTALI O SU MODELLI NUMERICI CHE ACCOPPIANO MODELLI DI STABILITA? A MODELLI DI INFILTRAZIONE E A MODELLI IDROLOGICI O IDROGEOLOGICI SEMPLIFICATI.
Fausto Guzzetti, 2015, Frane e alluvioni, una lunga storia italiana,
2015,
Abstract
LE PRIME INFORMAZIONI SU FRANE E INONDAZIONI IN ITALIA RISALGONO ALL'EPOCA ROMANA. LA PIU? ANTICA ...
LE PRIME INFORMAZIONI SU FRANE E INONDAZIONI IN ITALIA RISALGONO ALL'EPOCA ROMANA. LA PIU? ANTICA INONDAZIONE DI CUI ABBIAMO NOTIZIA AVVENNE LUNGO IL TEVERE NEL 414 AC. NEGLI ULTIMI 100 ANNI SI SONO VERIFICATE ALMENO 1.319 FRANE CHE HANNO PRODOTTO 7424 VITTIME (MORTI, DISPERSI E FERITI). I DATI DEL CATALOGO E DEI RAPPORTI CNR-IRPI.
Francesca Santaloia
Andrea Romanazzi
Pier Paolo Limoni
Maurizio Polemio, 2015, Formulation of a framework to guide the development of a numerical groundwater model to estimate the sustainable yield of the main sea level aquifer system. Technical Report of progress,
2015,
Abstract
This Technical Report is part of the activities realised for the Cooperation Covenant "Formulation of ...
This Technical Report is part of the activities realised for the Cooperation Covenant "Formulation of a framework to guide the development of a numerical groundwater model to estimate the sustainable yield of the main sea level aquifer system", agreed between the Research Institute for Geo-Hydrological Protection (Istituto di Ricerca per la Protezione Idrogeologica) of the Italian National Research Council (Consiglio Nazionale delle Ricerche, CNR), thereinafter CNR IRPI, and the Maltese Sustainable and Water Conservation Unit of Ministry for Energy and Health, thereinafter SEWCU.
SEWCU within the Ministry for Energy and Health is currently undertaking the development of Malta's 2nd River Basin Management Plan under the implementation process of the EU's Water Framework Directive. This process will identify a set of measures addressing the qualitative and quantitative status of groundwater, with the aim of ensuring the achievement of good status for the resource.
The achievement of good quantitative status is assessed by means of a water balance calculation, which compares inputs and outputs from the groundwater system. The system inputs define the sustainable yield of the particular groundwater system, where for the achievement of good status system outputs must not exceed this sustainable level.
The final purpose of the cooperation will be the numerical modelling of the Maltese coastal aquifer system to permit the sustainable management of groundwater resources considering the effects of climate change, including the variability of recharge, sea level and seawater salinity. The process could be utilised to define reliable figures for the safe-yield from these aquifers and the establishment of annual groundwater abstraction thresholds or optimal discharge schema utilising scientific up-to-date methodological approaches.
The first phase of activities includes a data exchange and a visit of the Italian research group to Malta to share the type and the amount of available rough data, technical surveys on the aquifers and technical discussions of both research groups to delineate the schematic characteristics of the activities to define the conceptualisation and modelling of Maltese aquifers and the type of results to be obtained with the modelling.
This Report summarizes the results capitalised after the visit of the Italian research group to Malta.
Rosa María Mateos (1), Inmaculada García-Moreno (1), Paola Reichenbach(2), Gerardo Herrera (1),
Roberto Sarro (1), Joan Rius (3), Raúl Aguiló (3), Federica Fiorucci (2), 2015, Calibration and validation of rockfall modelling at regional scale_ application along a roadway in Mallorca (Spain) and organization of its management,
Landslides (Berl., Internet) (2015). doi_10.1007/s10346-015-0602-5,
DOI: 10.1007%2Fs10346-015-0602-5
Abstract
The Tramuntana range, in the northwestern sector of the island of Mallorca (Balearic Islands, Spain), ...
The Tramuntana range, in the northwestern sector of the island of Mallorca (Balearic Islands, Spain), is frequently affected by rockfalls which have caused significant damage, mainly along the road network. In this work, we present the procedure we have applied to calibrate and validate rockfall modelling in this region, using 103 cases of the available detailed rockfall inventory (630 rockfall events collected since the eighteenth century). We have exploited STONE (Guzzetti et al. 2002), a GIS-based rockfall simulation software which computes 2D and 3D rockfall trajectories starting from a DTM and maps of the dynamic rolling friction coefficient and of the normal and tangential energy restitution
coefficients. The appropriate identification of these parameters
determines the accuracy of the simulation. To calibrate them, we
have selected 40 rockfalls along the range which include a wide
variety of outcropping lithologies. Coefficients values have been
changed in numerous attempts in order to select those where the
extent and shape of the simulation matched the field mapping.
Best results were summarized with the average statistical values for
each parameter and for each geotechnical unit, determining that
mode values represent more precisely the data. Initially, for the
validation stage, 10 well-known rockfalls exploited in the calibration
phase have been selected. Confidence tests have been applied
to their modelling results taking into account not only the success
but also the mistakes. The best accuracy is obtained when the
rockfall has a preferential trajectory and worse results when the
rockfall follows two or more trajectories. Additionally, the greater
the rockfall runout length, the less precise the simulation is. We
have further validated the calibrated parameters along the Maroad
(111 km), the main transportation corridor in the range, using
63 rockfall events that occurred during the past 18 years along the
road. Of the rockfalls where source areas were properly identified,
81.5 % are well represented by STONE modelling, as the travel
paths and the depositional areas are successfully ascertained. Results
of the analysis have been used by the Road Maintenance
Service of Mallorca to assess hazard and risk posed by rockfall at
regional scale to design the road management plan
A. Tarpanelli, L. Brocca, S. Barbetta, T. Lacava, M. Faruolo, and T. Moramarco, 2015, Integration of MODIS and Radar Altimetry Data for River Discharge Estimation from Space,
Engineering Geology for Society and Territory - River Basins, Reservoir Sedimentation and Water Resources, edited by Giorgio Lollino, Massimo Arattano, Massimo Rinaldi, Orazio Giustolisi, Jean-Christophe Marechal, Gordon E. Grant, pp. 607–610. CH-6330 Cham (ZG): Springer International Publishing, 2015,
Abstract
The study integrates data provided by Moderate Resolution Imaging Spectroradiometer, MODIS, onboard AQUA satellite and ...
The study integrates data provided by Moderate Resolution Imaging Spectroradiometer, MODIS, onboard AQUA satellite and by RA-2 altimeter onboard ERS-2 and ENVISAT satellites for river discharge estimation along the Po River (northern Italy). The discharge is estimated by multiplying the velocity estimated from MODIS by the flow area computed considering the water level derived by altimetry data. In the case of river cross-section survey not available, the entropy theory may be applied for reconstructing the bathymetry starting from the water surface elevation observed or retrieved by the altimeter. The discharge estimation is validated using in-situ measurements of the nearest hydrometric station where daily observations are available for the period from February 2005 to August 2010. The agreement with the observed discharge is fairly satisfactory with coefficient of correlation equal to 0.91 and root mean square error of 37 % against observed discharge. The results suggest that the proposed methodology has potential applications from the forthcoming SENTINEL-3 mission, in which two similar sensors will be onboard the same satellite platform and where significant improvements will be obtained in terms of vertical accuracy and spatial and temporal resolution.
Lacava, T., Brocca, L., Coviello, I., Faruolo, M., Pergola, N., Tramutoli, V., 2015, Integration of Optical and Passive Microwave Satellite Data for Flooded Area Detection and Monitoring,
Engineering Geology for Society and Territory - Engineering Geology for Society and Territory, edited by Giorgio Lollino, Massimo Arattano, Massimo Rinaldi, Orazio Giustolisi, Jean-Christophe Marechal, Gordon E. Grant, pp. 631–635. CH-6330 Cham (ZG): Springer International Publishing, 2015,
Abstract
Flooding represents a serious threat to millions of people around the world and its hazard ...
Flooding represents a serious threat to millions of people around the world and its hazard is rising as a result of climate changes. From this perspective, flood risk management is a key focus of many governments, whose priority is to have frequently updated and accurate information about the flood state and evolution to promptly react to the disaster and to put in place effective countermeasures devoted to limit damages and human lives losses. Remote sensing technology allows for flood monitoring at different spatial and temporal resolutions with an adequate level of accuracy. In particular, for emergency response purposes, an integrated use of satellite data, acquired by both optical and passive or active microwave instruments, has to be preferred to have more complete and frequently updated information on soil conditions and to better support decision makers. In this framework, multi-year time series of MODIS (Moderate Resolution Imaging Spectroradiometer) and AMSR-E (Advanced Microwave Scanning Radiometer for Earth Observing System) data were processed and analyzed. In detail, the Robust Satellite Techniques (RST), a multi-sensor approach for satellite data analysis, has been implemented for studying the August 2002 Elbe river flood occurred in Germany, trying to assess the potential of such an integrated system for the determination of soil status and conditions (i.e. moisture variation, water presence) as well as for a timely detection and a near real time monitoring of critical soil conditions.
Ciabatta, L., Brocca, L., Moramarco, T., Wagner, W., 2015, Comparison of different satellite rainfall products over the Italian territory,
Engineering Geology for Society and Territory, pp. 623–626, 2015,
Abstract
In this study, a preliminary analysis of three satellite-derived rainfall products is carried out in ...
In this study, a preliminary analysis of three satellite-derived rainfall products is carried out in order to evaluate their reliability and accuracy. Specifically, two state-of-art rainfall products are used_ the PR-OBS-5 provided by EUMETSAT within the Satellite Application Facility on Support to Operational Hydrology and Water Management (H-SAF) project and the 3B42-RT product from the Tropical Rainfall Measuring Mission (TRMM) Multiple Precipitation Analysis (TMPA). The third product is obtained by applying a new inversion method, called SM2RAIN, to satellite soil moisture data. In this latter approach, the soil is considered to be a "natural raingauge" that is employed for "measuring" rainfall. As benchmark, quality checked daily rainfall observations throughout the Italian territory for the period 2010-2011 are used. The comparison with ground observations is carried out in terms of correlation coefficients, R, and root mean square error, RMSE. The results show satisfactory R-values (and low RMSEs) between satellite and observed 5-day rainfall data with median R-values greater than 0.50. Moreover, by analyzing the error spatial patterns, and by considering the different temporal resolution of the products, the potential of integrating them in space and time is underlined as this can be expected to further improve the estimation of rainfall for hydrological applications over the Italian territory.
Christian Massari 1;*, Luca Brocca 1, Luca Ciabatta 1, Tommaso Moramarco 1, Simone Gabellani 2, Clement Albergel 3, Patricia De Rosnay 3, Silvia Puca 4 and Wolfgang Wagner 5, 2015, The use of H-SAF soil moisture products for operational hydrology_ flood modelling over Italy,
Hydrology 2 (2015): 2–22. doi_10.3390/hydrology2010002,
DOI: 10.3390%2Fhydrology2010002
Abstract
The ever increasing availability of new remote sensing and land surface model datasets opens new ...
The ever increasing availability of new remote sensing and land surface model datasets opens new chances for hydrologists in improving flood forecasting systems. The current study investigates the performance of two operational soil moisture (SM) products provided by "EUMETSAT Satellite Application Facility on Support to Operational Hydrology and Water Management" (H-SAF, http_//hsaf.meteoam.it/) within a recently developed hydrological model called "Simplified Continuous Rainfall-Runoff Model" (SCRRM) and the possibility to use such a model at an operational level. The model uses SM datasets derived from external sources (i.e. remote sensing and land surface models) as input for calculating the initial wetness conditions of the catchment prior to the flood event. Hydro-meteorological data from 35 Italian catchments ranging from 800 to 7400 km2 was used for the analysis for a total of 593 flood events. The results show that H-SAF operational products used within SCRRM satisfactorily reproduces the selected flood events providing a median Nash-Sutcliffe efficiency index equal to 0.64 (SM-OBS-1) and 0.60 (SM-DAS-2), respectively. Given the results obtained along with the parsimony, the simplicity and independence of the model from continuously recorded rainfall and evapotranspiration data, the study suggests that i) SM-OBS-1 and SM-DAS-2 contain useful information for flood modelling which can be exploited in flood forecasting, ii) SCRRM is expected to be beneficial as a component of a real-time flood forecasting systems in regions characterized by low data availability where a continuous modelling approach can be problematic.
Maccioni P.1, Kossida M.2, Brocca L.3, Moramarco T.4, 2015, Assessment of the drought hazard in the Tiber River Basin in Central Italy and a comparison of new and commonly used meteorological indicators,
Journal of hydrologic engineering 20 (2015): 05014029. doi_10.1061/(ASCE)HE.1943-5584.0001094,
DOI: 10.1061%2F(ASCE)HE.1943-5584.0001094
Abstract
Drought is one of the most common natural hazards with adverse impacts on agriculture and ...
Drought is one of the most common natural hazards with adverse impacts on agriculture and the water resources. This study aims to spatially analyse the drought hazard in the Upper Tiber River basin and find a representative indicator on the basis of meteorological data which are widely available. To this end, the significance of using solely precipitation versus including evapotranspiration (ET) in drought characterisation is thoroughly investigated. Three relevant indicators are considered_ 1) a new index SP*ETI (Standardized effective Precipitation EvapoTranspiration Index) incorporating, besides ET, the losses due to runoff; 2) the commonly used SPI (Standardized Precipitation Index) and 3) the RDI (Drought Reconnaissance Index). A comparison is undertaken at various time scales (9, 12, 24-months) using precipitation and temperature data from 2 stations for the period 1953-2011, for which complete rainfall and temperature timeseries are available. This analysis demonstrates_ i) the very similar evolution and behaviour of the 3 indexes; ii) the reliability of the SPI for drought monitoring and characterisation in the case of the Upper Tiber River basin, also using observed hydrological impacts as well. Based on these findings, a longer data set of available precipitation data (45 stations, 96 years long timeseries from 1916-2011) is used to calculate the SPI12, and to derive four new sub-indicators 2 reflecting the intensity, magnitude, duration and frequency of drought events. These sub-indicators, once classified, are blended into a Drought Hazard Index (DHI), thus providing a more holistic characterization of the drought hazard on a scale 1-4. A spatial analysis is finally performed across the resulting DHI values in order to investigate the spatial variability of drought hazard and identify drought prone areas. It is found that the most vulnerable areas are located in the southern and eastern part of the Upper Tiber River basin, while the north-central part is less affected by drought conditions.
Ciabatta, Luca; Brocca, Luca; Massari, Christian; Moramarco, Tommaso; Puca, Silvia; Rinollo, Angelo; Gabellani, Simone; Wagner, Wolfgang, 2015, Integration of Satellite Soil Moisture and Rainfall Observations over the Italian Territory,
Journal of hydrometeorology (Print) 16 (2015): 1341–1355. doi_10.1175/JHM-D-14-0108.1,
DOI: 10.1175%2FJHM-D-14-0108.1
Abstract
State-of-the-art rainfall products obtained by satellites are often the only way of measuring rainfall in ...
State-of-the-art rainfall products obtained by satellites are often the only way of measuring rainfall in remote areas of the world. However, it is well known that they may fail in properly reproducing the amount of precipitation reaching the ground, which is of paramount importance for hydrological applications. To address this issue, an integration between satellite rainfall and soil moisture SM products is proposed here by using an algorithm, SM2RAIN, which estimates rainfall from SM observations. A nudging scheme is used for integrating SM-derived and state-of-the-art rainfall products. Two satellite rainfall products are considered_ H05 provided by EUMESAT and the real-time (3B42-RT) TMPA product provided by NASA. The rainfall dataset obtained through SM2RAIN, SM2R(ASC), considers SM retrievals from the Advanced Scatterometer (ASCAT). The rainfall datasets are compared with quality-checked daily rainfall observations throughout the Italian territory in the period 2010-13. In the validation period 2012-13, the integrated products show improved performances in terms of correlation with an increase in median values, for 5-day rainfall accumulations, of 26% (18%) when SM2R(ASC) is integrated with the H05 (3B42-RT) product. Also, the median root-mean-square error of the integrated products is reduced by 18% and 17% with respect to H05 and 3B42-RT, respectively. The integration of the products is found to improve the threat score for medium-high rainfall accumulations. Since SM2R(ASC), H05, and 3B42-RT datasets are provided in near-real time, their integration might provide more reliable rainfall products for operational applications, for example, for flood and landslide early warning systems.
Brocca, Luca; Massari, Christian; Ciabatta, Luca; Moramarco, Tommaso; Penna, Daniele; Zuecco, Giulia; Pianezzola, Luisa; Borga, Marco; Matgen, Patrick; Martinez-Fernandez, Jose, 2015, Rainfall estimation from in situ soil moisture observations at several sites in Europe_ an evaluation of the SM2RAIN algorithm,
Vodohospodársky casopis (Tlacené vyd.) 63 (2015): 201–209. doi_10.1515/johh-2015-0016,
DOI: 10.1515%2Fjohh-2015-0016
Abstract
Rain gauges, weather radars, satellite sensors and modelled data from weather centres are used operationally ...
Rain gauges, weather radars, satellite sensors and modelled data from weather centres are used operationally for estimating the spatial-temporal variability of rainfall. However, the associated uncertainties can be very high, especially in poorly equipped regions of the world. Very recently, an innovative method, named SM2RAIN, that uses soil moisture observations to infer rainfall, has been proposed by Brocca et al. (2013) with very promising results when applied with in situ and satellite-derived data. However, a thorough analysis of the physical consistency of the SM2RAIN algorithm has not been carried out yet. In this study, synthetic soil moisture data generated from a physically-based soil water balance model are employed to check the reliability of the assumptions made in the SM2RAIN algorithm. Next, high quality and multiyear in situ soil moisture observations, at different depths (5-30 cm), and rainfall for ten sites across Europe are used for testing the performance of the algorithm, its limitations and applicability range.
SM2RAIN shows very high accuracy in the synthetic experiments with a correlation coefficient, R, between synthetically generated and simulated data, at daily time step, higher than 0.940 and an average Bias lower than 4%. When real datasets are used, the agreement between observed and simulated daily rainfall is slightly lower with average R-values equal to 0.87 and 0.85 in the calibration and validation periods, respectively. Overall, the performance is found to be better in humid temperate climates and for sensors installed vertically. Interestingly, algorithms of different complexity in the reproduction of the underlying hydrological processes provide similar results. The average contribution of surface runoff and evapotranspiration components amounts to less than 4% of the total rainfall, while the soil moisture variations (63%) and subsurface drainage (30%) terms provide a much higher contribution. Overall, the SM2RAIN algorithm is found to perform well both in the synthetic and real data experiments, thus offering a new and independent source of data for improving rainfall estimation, and consequently enhancing hydrological, meteorological and climatic studies.
Cavalli M., Crema S., Viero A., Marchi L., 2015, Attività di studio sulle conoidi con sviluppo di una metodologia di raccolta dati e loro applicazione su aree test.,
2015,
Abstract
In accordo con quanto previsto dall'Art. 4 della convenzione tra la Regione del Veneto e ...
In accordo con quanto previsto dall'Art. 4 della convenzione tra la Regione del Veneto e il Consiglio Nazionale delle Ricerche - Istituto di Ricerca per la Protezione Idrogeologica per "attività di studio sulle conoidi con sviluppo di una metodologia di raccolta dati e loro applicazione su aree test", il presente documento descrive lo stato di avanzamento delle attività.
Il presente rapporto si compone di quattro sezioni_ la sezione 2 introduce le principali classificazioni dei processi torrentizi e descrive i principali approcci per il loro riconoscimento, la sezione 3 descrive e integra la procedura regionale per il riconoscimento della tipologia dei processi attesi ed alla successiva valutazione del grado di pericolosità dei conoidi alluvionali, nella sezione 3 vengono descritte la scheda finalizzata alla raccolta dei dati e delle informazioni necessarie del sistema bacino-conoide per l'applicazione della procedura sviluppata e una prima struttura di database geografico dei conoidi ed, infine, la sezione 4 riporta i risultati ottenuti nell'area test in Provincia di Vicenza.
Aigner J., Habersack H., Rindler R., Blamauer B., Wagner B., Schober B., Comiti F., Dell'Agnese A., Engel M., Liebault F., Bel C., Bellot H., Fontaine F., Piegay H., Benacchio V., Lemaire P., Ruiz-Villanueva V., Vaudor L., Cavalli M., Marchi L., Crema S., Brardinoni, F., Bezak N., Rusjan S., Miko? M., Abel J., Becht M., Heckmann T., Rimböck A., Schwaller G., Höhne R., Cesca M., Vianello A., Krivograd Klemen?i? A., Pape? J., Lenzi M.A., Picco L., Moretto J., Ravazzolo D., Jäger G., Moser M., Hübl J., Chiari M., 2015, Sediment transport monitoring,
2015,
Abstract
The SedAlp project contributes to an integrated management of sediment transport in Alpine basins. It ...
The SedAlp project contributes to an integrated management of sediment transport in Alpine basins. It is directed to an effective reduction of sediment-related risk while promoting the enhancement of riverine ecosystems and reducing the impacts of hydropower plants (balancing the implementation of EU Directives and national law e.g. RES, WFD, NGP etc.). SedAlp includes pilot actions in various representative Alpine river basins of five countries and contributes in particular to monitor sediment and wood transfer in a large set of Alpine catchments. A major goal of the project was to understand spatial and temporal variability of processes and to provide planning, warning and predictive tools but also sediment and wood management recommendations for protecting people. Furthermore the project includes strategy policy development and implementation actions for the improvement of sediment continuity in Alpine river basins. SedAlp regards the geological and climatic variability across the Alps that generate complex patterns of sediment transfer, whereas management conflicts are similar. To reach the ambitious goals of the project, it is essential to understand the key processes of sediment and wood transport.
Workpackage 5 with the title "sediment transport monitoring" was focused to enhance the knowledge about these transport processes by conducting the first standardized transnational monitoring of sediment and wood transport in Alpine basins. WP5 concentrated on monitoring and assessing fluxes of sediment and wood at the local scale. Measured fluxes are strongly depending on the supply from the catchment and on the connectivity to source areas, analysed in WP4. The output of WP5 feeds WP6 which studied the interferences between structures and sediment/wood fluxes and forms the basis for WP7 which linked the catchment with channel processes. Finally, the results of WP5 contribute to policy recommendations in WP8.
Within WP5, monitoring activities on 28 different pilot sites in Austria, Germany, France, Italy and Slovenia have been conducted between 2012 and 2015. The monitored transport processes covered woody debris, debris flow, bedload and suspended load. The different pilot sites showed a great diversity in catchment size, channel slope and hydraulic parameters and covered the whole bandwidth from small, high alpine catchments (e.g. Strimm_ 5 km² catchment size, 2427 m elevation a.s.l) to large catchments in the alpine valleys (e.g. Drau/Dellach: 2131 km² catchment size, 600 m elevation a.s.l). With the results of the monitoring activities, a database using different parameters regarding the transport process has been established and reflects the big diversity of the different pilot sites. The coordinated sediment transport monitoring outlined the links between the various processes responsible for sediment delivery at catchment scale and stresses out the need for a closer integration between the monitoring of various sediment transport processes in Alpine headwaters.
Due to the wide range of different measurement methods used within the project, one focus of this work package was to standardize the measurement procedures and harmonize data analysis. This led to the 1st milestone "Protocol on standardized data collection methods in sediment transport monitoring for transboundary exchange". These protocols were intended to describe the used monitoring techniques and data processing methods for debris flows, wood transport and bedload transport. Furthermore, the protocols work also as guidelines to assist in choosing the appropriate monitoring method for supporting prospective monitoring efforts.
4
An important aspect of the project was to understand spatial and temporal variability of the monitored processes. The observed appearance of clockwise and counter clockwise hysteresis effects between sediment and discharge, showed the significant role of the location of the active sediment source in the temporal variability of sediment transport.
Analysis of the spatial distribution showed an evolvement of the bedload transport width with increasing discharge which provides vital information for an improved planning of river related measures. To determine these process related variability, the use of appropriate monitoring methods as well as their right application is of great importance. Indirect monitoring methods (e.g. geophone devices) pointed out their potential in the automatic and continuous detection of these transport processes. The presented data reflect a high spatial and temporal variability in the occurrence of bedload, suspended load debris flow and wood transport and reveal significant consequences for the practical usage of monitoring methods, data and application.
Many river engineering tasks require detailed information about the extent of sediment transport and wood mobility, which are provided by sediment and wood transport relations and equations. The 3rd milestone "First set of practically applicable bedload/wood transport relations and models" gives an overview about the most common transport relations and formulas. Furthermore it presents the difficulties and challenges in the application of these relations and shows the last developments in improving transport equations. The comparison between measured and calculated specific bedload transport rates showed substantial differences in the derived results. For the practical use of these relations it is strongly recommended to select, calibrate and validate the sediment and wood transport equations using monitored field data.
The evaluation of river restoration projects showed the need of an improved process understanding between sediment transport an engineering measures. The functionality and sustainability of river restoration measures are, beside the hydrologic and hydraulic conditions, mainly depending on the superior sediment regime and thus the sediment input into the reach. By increase or decrease of the mean sediment input, the hydraulic and thus morphological conditions of the reach need to rearrange to the given input by e.g. lateral and vertical adjustments of the river bed or by changing the river type.
Brardinoni F., Cavalli M., Heckmann T., Liebault F., Rimbock A., 2015, Guidelines for assessing sediment dynamics in Alpine basins and channel reaches,
2015,
Abstract
The management of Alpine catchments requires the knowledge of sediment
dynamics; it is related to natural ...
The management of Alpine catchments requires the knowledge of sediment
dynamics; it is related to natural hazards and environmental quality, it may
contribute to the infilling of reservoirs, and it is useful for both investigating
the need for and assessing the effectiveness of erosion-control measures.
In natural catchments, and even more so in those affected by human
impacts, sediment transfer is spatially and temporally discontinuous. The
SedAlp project addresses issues of sediment continuity and Work Package
4 (WP4), specifically, aims at evaluating sediment transfer spatially (i.e.,
location of sediment sources, sinks, and pathways) and quantitatively at
the catchment scale. This report collates SedAlp studies related to this
topic, explains the respective methodology, and gives recommendations.
While it does not present an approach to compare catchments with respect
to their sediment dynamics, it outlines a conceptual and methodological
framework that can be a useful basis towards such purposes.
Lenzi M.A., Picco L., Moretto J., Ravazzolo D., Macconi P., Mazzorana B., Vianello A., Cesca M., Brardinoni F., Perina E., Cavalli M., Bodrato G., Del Vesco R., Tresso F., Piégay H., Roux C., Vaudor L., Rusjan S., Kogoj M., D?ebo, E., Bezak, N., Klösch M., Aigner J., Habersack H., Blamauer B., Bizjak A., Papez J., 2015, Sediment management,
2015,
Abstract
This report provides the results of Work Package 7 (WP7). WP7 focuses on the integration ...
This report provides the results of Work Package 7 (WP7). WP7 focuses on the integration of
methodological approaches across scales and provides guidelines for policy development in
the context of sediment and large wood management.
Two guidelines with methodological explanations and good practice examples are provided
as expected output of this WP. The contents of the first guideline are the estimation of
sediment budget and scenarios determination to be used for flood mitigation in Alpine
basins. The identification of morphological impacts related to hydropower plants and gravel
extraction is dealt with in the second guideline.
Sediment budget analysis consists in the evaluation of fluxes, sources and sinks from
different processes. Different factors influence sediment and wood transport and need to be
carefully evaluated within specific spatial and temporal scales. Correct approaches and tools
to estimate sediment and wood budget that consider the river reach of interest, with its
specific basin and channel processes in order to evaluate the availability of transportable
material are focused on in the first guideline.
Sediment mobility ranges from bedload (mountain and foothill reaches) to
hyperconcentrated and debris flows (mountain reaches). Wood, is instead mainly delivered
by floating, bank erosion processes and landslides. Different scenarios concerning the
interaction with structures, sediment continuity, torrent-control strategies for sediment
erosion and debris flows in relation to an efficient structure design are dealt with in the
second part of the first guideline. In addition, sediment retention management and policy
are discussed to highlight recent trends in the regulatory instruments.
Dams represent one of the most significant human interventions in the hydrological cycle.
Dams and reservoirs are built and operated for several purposes such as power generation,
flood protection, drinking water or agricultural water supply, recreation, fishing, and others.
The construction of a dam results in discontinuities to the river continuum; their presence
can strongly interact with the sediment continuity from the upper parts of the basin to the
area downstream of dams.
While the 20th century focused on dam construction, the 21st will focus on sustaining the
function of existing infrastructure as it becomes increasingly affected by sedimentation. The
objective of sediment management is to manipulate the river-reservoir system to achieve
sediment balance while retaining as much beneficial storage as possible, and minimizing
environmental impacts and socioeconomic costs.
Procedures for the identification of morphological impacts related to hydropower plants and
gravel extraction are provided in the second guideline. The first part of the guideline is
focused on reservoir sediment management plans and proposals for management
improvement. Indicators for the evaluation of fluviomorphological impacts due to sediment
removal or sediment supply reduction are presented in the second part of this guideline.
Finally, recommendations and implications for policy, practitioners and for research are
provided for both guidelines.
Tayfur, Gokmen; Brocca, Luca, 2015, Fuzzy Logic for Rainfall-Runoff Modelling Considering Soil Moisture,
Water resources management (2015). doi_10.1007/s11269-015-1012-0,
DOI: 10.1007%2Fs11269-015-1012-0
Abstract
This study developed Mamdani-type fuzzy logic model to simulate daily discharge as a function of ...
This study developed Mamdani-type fuzzy logic model to simulate daily discharge as a function of soil moisture measured at three different depths (10, 20 and 40 cm) and rainfall. The model was applied to 13 km2 size Colorso Basin in central Italy for a period from October 2002 to April 2004. For each variable of soil moisture, rainfall, and discharge, 9 fuzzy subsets were employed while 30 fuzzy rules, relating the input variables (soil moisture and rainfall) to the output variable (discharge), were optimized. The model employed the min inferencing, max composition, and the centroid method. The model application results revealed that Mamdani-type fuzzy logic model can be employed to incorporate soil moisture along with rainfall to simulate discharge. Using soil moisture measured at 40 cm soil depth along with rainfall produced better simulation of discharge with NS = 0.68 and R = 0.82. The performance of the model was also tested against a conceptual rainfall-runoff model of MISDc (Modello Idrologico Semi-Distribuito in continuo). MISDc couples an event-specific component with a module for continuous time soil water balance for taking into account the variable antecedent wetness conditions. The MISDc model requires estimation of seven parameters and the measurements of the hydrometeorological variables such as rainfall and air temperature. The comparative study revealed that fuzzy model performs better in capturing runoff peak rates and overall trend of high and small flooding events.
Franz, Trenton E.; Wang, Tiejun; Avery, William; Finkenbiner, Catherine; Brocca, Luca, 2015, Combined analysis of soil moisture measurements from roving and fixed cosmic ray neutron probes for multiscale real-time monitoring,
Geophysical research letters 42 (2015): 3389–3396. doi_10.1002/2015GL063963,
DOI: 10.1002%2F2015GL063963
Abstract
Soil moisture partly controls land-atmosphere mass and energy exchanges and ecohydrological processes in natural and ...
Soil moisture partly controls land-atmosphere mass and energy exchanges and ecohydrological processes in natural and agricultural systems. Thus, many models and remote sensing products continue to improve their spatiotemporal resolution of soil moisture, with some land surface models reaching 1km resolution. However, the reliability and accuracy of both modeled and remotely sensed soil moisture require comparison with ground measurements at the appropriate spatiotemporal scales. One promising technique is the cosmic ray neutron probe. Here we further assess the suitability of this technique for real-time monitoring across a large area by combining data from three fixed probes and roving surveys over a 12km×12km area in eastern Nebraska. Regression analyses indicated linear relationships between the fixed probe averages and roving estimates of soil moisture for each grid cell, allowing us to derive an 8h product at spatial resolutions of 1, 3, and 12km, with root-mean-square error of 3%, 1.8%, and 0.9%. Key Points Combine fixed and roving cosmic ray neutron soil moisture data sets Data merging techniques to design soil moisture network at different scales Soil moisture network can provide spatiotemporal data and stats for downscaling