Monitoring of the Gollone landslide, Acceglio (CN)

evidenza-gollone

Background

The landslide monitoring represents a strategic activity, especially for those phenomena for which it is not possible (for technical or financial reasons) to realize stabilization interventions of the landslide. Nevertheless, the data acquisition is only the first part of the project, to which it is necessary to couple an on line management of the processed data and to realize monitoring bulletins.

Purpose

The aim of the study is the comprehension of the instability phenomenon of Gollone, a complex rocky landslide that triggered catastrophic failures in the past, which destroyed part of the residential zone of Acceglio (CN).

Methods

The landslide is monitored by a robotized total station and a high-resolution photo camera. Data are collected at the servers in Torino and published in real-time on the Geohazard Monitoring Group web site. Moreover, campaigns with GBSAR and UAV surveys have been performed.

Results

The study scheduling includes the landslide monitoring and possible individuation of areas characterized by anomalous behaviors that might (partially) reactivate the landslide. At the present moment, only a limited portion of the landslide shows movement signs. Furthermore, the project plans an integrated data analysis, coupling the UAV surveys and the GBSAR data with those of the total station.

Products

The study aims at a deeper comprehension of the landslide features and at the developing of a methodology of data and report management. Specifically, the report is also transmitted to the Regione Piemonte and it is utilized for reference for the definition of the communication protocol of the topographic monitoring network.

Conclusions

The study of the Gollone landslide establishes different objectives, among which:
i) knowledge improvement of the landslide phenomenon, ii) the development of a system for coupling the different employed monitoring devices, iii) the definition of a report model in order to periodically update the activity state of the landslide.