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| Titel |
Forest cover influence on regional flood frequency assessment in Mediterranean catchments |
| VerfasserIn |
F. Preti, G. Forzieri, G. B. Chirico |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 15, no. 10 ; Nr. 15, no. 10 (2011-10-07), S.3077-3090 |
| Datensatznummer |
250012986
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| Publikation (Nr.) |
 copernicus.org/hess-15-3077-2011.pdf |
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| Zusammenfassung |
| The paper aims at evaluating to what extent the forest cover can explain the
component of runoff coefficient as defined in a regional flood frequency
analysis based on the application of the rational formula coupled with a
regional model of the annual maximum rainfall depths. The analysis is
addressed to evaluate the component of the runoff coefficient which cannot
be captured by the catchment lithology alone. Data mining is performed on 75
catchments distributed from South to Central Italy. Cluster and correlation
structure analyses are conducted for distinguishing forest cover effects
within catchments characterized by hydro-morphological similarities. We
propose to improve the prediction of the runoff coefficient by a linear
regression model, exploiting the ratio of the forest cover to the catchment
critical rainfall depth as dependent variable. The proposed regression
enables a significant bias correction of the runoff coefficient,
particularly for those small mountainous catchments, characterised by larger
forest cover fraction and lower critical rainfall depth. |
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