Coexistence of a Marginal Mountain Community with Large-Scale and Low Kinematic Landslide: The Intensive Monitoring Approach

Author:

Godone Danilo1ORCID,Allasia Paolo1ORCID,Notti Davide1ORCID,Baldo Marco1ORCID,Poggi Flavio2,Faccini Francesco13ORCID

Affiliation:

1. Istituto di Ricerca per la Protezione Idrogeologica, Consiglio Nazionale delle Ricerche, 10135 Torino, Italy

2. Dipartimento Ambiente e Protezione Civile, Settore Interventi Difesa del Suolo, Regione Liguria, 16146 Genova, Italy

3. Dipartimento di Scienze della Terra, dell’Ambiente e della Vita, Università degli Studi di Genova, 16132 Genova, Italy

Abstract

Mountain territories affected by natural hazards are vulnerable areas for settlements and inhabitants. Additionally, those areas are characterized by socio-economic marginality, further favoring their abandonment. The study area is located in Liguria (Italy), and a large, slow-moving phenomenon endangers the settlements in the region. Monitoring such phenomena requires the use of instruments capable of detecting yearly, millimetric displacements and, due to their size, the use of remote techniques which can provide deformation measurement of the entire extent of the phenomenon. The methodology proposed here couples long-term interferometric remote sensing data analysis with intensive in situ monitoring (inclinometer, piezometers and global navigation satellite systems). Furthermore, the inclinometric measurements were carried out with an experimental, robotized inclinometer. The aim is to frame the overall context of ground deformation, assure information for inhabitants, stakeholders and land-planners, and secure coexistence with the phenomenon. Remote sensing provided a time series of 28 years of deformation measurements while in situ instrumentations allowed, in the last years, a better understanding of the surficial and deep behavior of the phenomenon, confirming the satellite data. Additionally, the high-frequency monitoring allowed us to record acceleration after precipitation peaks. The proposed approach, including the experimental instruments, proved its viability and can be replicated in similar mountain contexts.

Funder

Regione Liguria and Ne Municipality

Publisher

MDPI AG

Subject

General Earth and Planetary Sciences

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