In Tuscany (Central Italy) hillslopes are often affected by landslides that mainly involve the shallow regolith (i.e. the first 2 m) and the soil. An assessment of the factors controlling the geotechnical and hydrological features is crucial to understand the occurrence of slope instability mechanisms. The aim of this study is to improve the reliability of the outputs of the deterministic HIRESSS (HIgh REsolution Slope Stability Simulator) model. This software makes use of Monte Carlo simulation techniques to manage the uncertainty inherent in the geotechnical and hydrological input parameters. In situ determinations of geotechnical properties were made to assess the variation and uncertainty in these parameters. The data collected allowed a map of the input parameters for HIRESSS to be made, and a case study in the northern-western part of Tuscany have been evaluated. So far, the difficulty in determining the soil initial saturation state didn’t allowed to achieve a fully satisfying result in terms of prediction reliability. However, a step further has been made and the simulations performed making use of the in situ collected data are expected to show substantial improvement in the results compared to the use of literature parameters.

Geotechnical in situ measures to improve landslides forecasting models: A case study in Tuscany (Central Italy) / Bicocchi G.; D’Ambrosio M.; Rossi G.; Rosi A.; Tacconi-Stefanelli C.; Segoni S.; Nocentini M.; Vannocci P.; Tofani V.; Casagli N.; Catani F.. - STAMPA. - (2016), pp. 419-424. (Intervento presentato al convegno 12th International Symposium on Landslides tenutosi a Naples, Italy nel 12-19 June 2016).

Geotechnical in situ measures to improve landslides forecasting models: A case study in Tuscany (Central Italy)

BICOCCHI, GABRIELE;D'AMBROSIO, MICHELE;ROSSI, GUGLIELMO;ROSI, ASCANIO;TACCONI STEFANELLI, CARLO;SEGONI, SAMUELE;NOCENTINI, MASSIMILIANO;VANNOCCI, PIETRO;TOFANI, VERONICA;CASAGLI, NICOLA;CATANI, FILIPPO
2016

Abstract

In Tuscany (Central Italy) hillslopes are often affected by landslides that mainly involve the shallow regolith (i.e. the first 2 m) and the soil. An assessment of the factors controlling the geotechnical and hydrological features is crucial to understand the occurrence of slope instability mechanisms. The aim of this study is to improve the reliability of the outputs of the deterministic HIRESSS (HIgh REsolution Slope Stability Simulator) model. This software makes use of Monte Carlo simulation techniques to manage the uncertainty inherent in the geotechnical and hydrological input parameters. In situ determinations of geotechnical properties were made to assess the variation and uncertainty in these parameters. The data collected allowed a map of the input parameters for HIRESSS to be made, and a case study in the northern-western part of Tuscany have been evaluated. So far, the difficulty in determining the soil initial saturation state didn’t allowed to achieve a fully satisfying result in terms of prediction reliability. However, a step further has been made and the simulations performed making use of the in situ collected data are expected to show substantial improvement in the results compared to the use of literature parameters.
2016
Landslides and engineered slopes. Experience, theory and practice - Vol.2
12th International Symposium on Landslides
Naples, Italy
12-19 June 2016
Bicocchi G.; D’Ambrosio M.; Rossi G.; Rosi A.; Tacconi-Stefanelli C.; Segoni S.; Nocentini M.; Vannocci P.; Tofani V.; Casagli N.; Catani F....espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1044060
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