Peak runoff contributing area as hydrological signature of the probability distribution of floods |
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| Authors: | Mauro Fiorentino Salvatore Manfreda Vito Iacobellis |
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| Institution: | 1. Dipartimento di Ingegneria e Fisica dell’Ambiente (DIFA), Università degli Studi della Basilicata, Potenza, via dell’Ateneo Lucano 10, 85100, Italy;2. Dipartimento di Ingegneria delle Acque e di Chimica (DIAC), Politecnico di Bari, via E.Orabona 4, 70125 Bari, Italy |
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| Abstract: | For the analysis of hydrological extremes and particularly in flood prediction, deeper investigation is needed on the relative effects of different hydrological processes acting at the basin scale in different hydroclimatic areas of the world. In this framework, the theoretical derivation of flood distribution shows a great potential for development and knowledge advancement. In addition, another promising path of investigation is represented by the use of distributed hydrological models via simulation modelling (including Monte Carlo, discrete event and continuous simulation). In this paper results of a theoretically derived flood frequency distribution are analyzed and compared with the results of a simulation scheme that uses a distributed hydrological model (DREAM) in cascade with a rainfall generator (IRP). The numerical simulation allows the reproduction of a large number of extreme events and provides insight into the main control for flood generation mechanisms with particular emphasis to the peak runoff contributing areas, highlighting the relevance of soil texture and morphology in different climatic environments. The proposed methodology is applied here to the Agri and the Bradano basin, in Southern Italy. |
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| Keywords: | Hydrological modelling Numerical simulation Peak runoff contributing areas Flood prediction Climate-soil and vegetation interactions |
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