Preliminary insights from hydrological field monitoring for the evaluation of landslide triggering conditions over large areas

Luca Schilirò (), Gian Marco Marmoni, Matteo Fiorucci, Massimo Pecci and Gabriele Scarascia Mugnozza
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Luca Schilirò: Consiglio Nazionale delle Ricerche (CNR)
Gian Marco Marmoni: Sapienza Università di Roma
Matteo Fiorucci: Sapienza Università di Roma
Massimo Pecci: Consiglio dei Ministri (DARA)
Gabriele Scarascia Mugnozza: Sapienza Università di Roma

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2023, vol. 118, issue 2, No 24, 1426 pages

Abstract: Abstract Rainfall-induced landslides represent a major threat to human activities, and thus an improved understanding of their triggering mechanisms is needed. The paper reports some preliminary inferences on this topic, based on the data recorded over a 2-year period by a multi-parametric monitoring station located on one of the slopes of the Monterosso catchment (Cinque Terre, north-western Italy). This catchment has experienced multiple, concurrent shallow landslides after intense rainfall events. After defining a soil hydraulic model through data interpretation and numerical simulations, slope stability analyses were performed to elucidate several aspects related to shallow landslide occurrence. Both long-term climate conditions and single rainfall events were simulated via physically based approaches. The findings from these simulations enabled us to assume the pattern of infiltration and quantify the impact of soil hydraulic behavior on landslide triggering conditions. In this regard, various analyses were carried out on the same triggering event both at local scale and in the overall catchment, with a view to highlighting the role of initial soil moisture and soil hysteretic behavior in slope stability.

Keywords: Rainfall-induced landslides; Stability analysis; Hydraulic conditions; Physically based model; Field monitoring; Italy (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1007/s11069-023-06064-0

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