An Aid In The Most Accurate Rainfall
Thresholds Evaluation
Author(s)
L. Longoni & M. Papini
Abstract
In this paper a new methodology to identify the most accurate rainfall threshold
in relation to some events is presented. The rainfall thresholds definition is one
of the most important aspects in controlling slope stability in colluvial and
detritic materials. For this purpose this study investigates the most important
rainfall thresholds presented in literature: both empirical and physically based
ones. With the aim of contributing to the landslide hazard forecasting, a
comparison among the main rainfall thresholds and real cases was carried out.
Data from different locations (in Alpine areas) and triggering rainfalls have been
analyzed in order to define a methodology for choosing the best threshold in
relation to the local conditions of the slope. On the basis of the available
database, a detailed description of the applicability of the rainfall thresholds to
features of the territory is presented. The effect of the geo-morphological
conditions of the case studies is actually important in the choosing of the rainfall
threshold. This paper suggests a methodology with some determinant rules for
choosing the best available rainfall thresholds for the investigated case. This
procedure is a useful instrument for civil protection services interested in
landslide hazard management, especially for landslide reactivation.
Keywords: rainfall threshold shallow landslides, empirical and physical based
models.
1 Introduction
Rainfall produces some of the most frequent causes that trigger landslide
movement. In particular in debris flow, characterised by a sudden occurrence of
extremely rapid cinematic, recognizing the conditions which produce landslides
Keywords
rainfall threshold shallow landslides, empirical and physical based
models.
Related Book
Other papers in this volume
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