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Erschienen in:
2013 | OriginalPaper | Buchkapitel
Operational Procedure for a Hydrogeological Warning System in Aosta Valley
verfasst von : Sara Maria Ratto, Hervé Stevenin, Evelyne Navillod, Marco Cauduro
Erschienen in: Landslide Science and Practice
Verlag: Springer Berlin Heidelberg
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Abstract
The main mission of a Functional Centre consists in the daily issuing of the “criticality bulletin” defining the alert level for hydrogeological and hydraulic risk at regional scale. The forecast system of the hydrogeological risk in the Aosta Valley used to be based on a threshold system, developed by the Italian Civil Protection Department. The operator was used to decide the alert level on the basis of his experience, using the maximum precipitation threshold as the only indicator for landslide triggering processes. A new operational multi-parametric threshold system has been developed, taking into account the maximum precipitation and the snow level too, calibrated through a back analysis of the previous 10 years. At the same time a new procedure has been drafted in order to take advantage of the experience acquired by operators and to uniformize the warning selection criteria. A new method to predict criticality scenarios has been developed and it is now being tested.