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Published in

European Geosciences Union, Hydrology and Earth System Sciences, 4(10), p. 589-601, 2006

DOI: 10.5194/hess-10-589-2006

European Geosciences Union, Hydrology and Earth System Sciences Discussions, 6(2), p. 2393-2425

DOI: 10.5194/hessd-2-2393-2005

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Relationships between statistics of rainfall extremes and mean annual precipitation: an application for design-storm estimation in northern central Italy

Journal article published in 2006 by G. Di Baldassarre ORCID, A. Castellarin ORCID, A. Brath
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Several hydrological analyses need to be founded on a reliable estimate of the design storm, which is the expected rainfall depth corresponding to a given duration and probability of occurrence, usually expressed in terms of return period. The annual series of precipitation maxima for storm duration ranging from 15 min to 1 day are observed at a dense network of raingauges sited in northern central Italy are statistically analyzed using an approach based on L-moments. The study investigates the statistical properties of rainfall extremes and identifies important relationships between these properties and the mean annual precipitation (MAP). On the basis of these relationships, we develop a regional model for estimating the rainfall depth for a given storm duration and recurrence interval in any location of the study region. The reliability of the regional model is assessed through Monte Carlo simulations. The results are relevant given that the proposed model is able to reproduce the statistical properties of rainfall extremes observed for the study region.