The Impact of Hydrological Parameters on Modelling Slope Safety Factor Towards Shallow Landslides: A Case Study from Oltrepò Pavese

Hydrological monitoring of slope susceptible to shallow landslides allows for identifying the triggering conditions of shallow failures and implementing slope stability analysis at site-specific scale. In this work, a case study of a long-term hydrological monitoring in a slope susceptible to shallo...

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Bibliographic Details
Main Authors: Bordoni, M., Meisina, C., Valentino, R., Persichillo, M.G., Bittelli, M., Chersich, S.
Format: Conference Proceeding
Language:English
Subjects:
Case studies
Environmental monitoring
Hydrology
Landslides
Landslides & mudslides
Mathematical models
Moisture content
Monitoring
Parameters
Pore water
Pore water pressure
Safety
Safety factors
Saturated soils
Slope stability
Stability analysis
Unsaturated soils
Water content
Water pressure
Water table
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Summary:Hydrological monitoring of slope susceptible to shallow landslides allows for identifying the triggering conditions of shallow failures and implementing slope stability analysis at site-specific scale. In this work, a case study of a long-term hydrological monitoring in a slope susceptible to shallow landslides of Oltrepò Pavese (Northern Italy) is presented. The triggering mechanism develops in wet seasons (winter and spring) due to the uprise of a perched water table at about 1 m from ground surface, in consequence of the most intense rainfalls (about > 60 mm in 48 h). Unstable conditions (safety factor < 1.0) are correctly modeled on the basis of both water content and pore water pressure, with a better prediction considering hysteresis effects. Safety factor on the basis of water content can correctly assess the triggering conditions for unsaturated and completely saturated soils. It is possible estimating shallow landslides triggering caused by positive pore water pressures only considering this parameter.
ISSN:2267-1242
2555-0403
2267-1242
DOI:10.1051/e3sconf/20160915005