Regional Methods For Shallow Landslide
Hazard Evaluation: A Comparison Between Italy
And Central America
Author(s)
D. Brambilla, L. Longoni & M. Papini
Abstract
Landslides are a serious issue in the Latin American and Caribbean region,
causing disasters and casualties every year. Since these regions suffer from
endemic poverty and few resources can be allocated for civil protection, the need
to maximize results is strong. In order to diminish vulnerability and increase
effectiveness of any intervention, a wide knowledge of territory critical situations
needs to be achieved. This paper suggests two useful tools to build hazard maps
of a chosen territory; these maps can be useful as a Decision Support System
(DSS) to help the management of economical resources and to identify the
situations that have the greatest need. The two methods proposed are Stability
Index MAPping (SINMAP) and the Mora and Vahrson method. Both methods
start from the digital terrain model and other various parameters, linked mainly
to slope lithology and rainfalls, and obtain a map of the relative hazard from
shallow landslides. The methods have been applied to two study cases: one in
Guatemala, a perfect example of what has been mentioned about the difficult
Central American situation, and one in the Varese district in Italy, a well known
site which provides plenty of data and information that was useful to the authors
for rigorous testing of methods. Finally the results have been compared,
highlighting the strong influence of input data quality on results and the
interesting potential of the tested methods; these proved to be successful when
input data have enough resolution and to be useful as a DSS in order to identify
critical areas and intensify efforts in these areas.
Keywords: shallow landslides, Central America, Stability Index MAPping
(SINMAP), Mora and Vahrson, GIS, hazard map.
Keywords
shallow landslides, Central America, Stability Index MAPping
(SINMAP), Mora and Vahrson, GIS, hazard map
Related Book
Other papers in this volume
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