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| Titel |
Estimation of synthetic flood design hydrographs using a distributed rainfall–runoff model coupled with a copula-based single storm rainfall generator |
| VerfasserIn |
A. Candela, G. Brigandí, G. T. Aronica |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Sciences ; 14, no. 7 ; Nr. 14, no. 7 (2014-07-24), S.1819-1833 |
| Datensatznummer |
250118545
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| Publikation (Nr.) |
 copernicus.org/nhess-14-1819-2014.pdf |
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| Zusammenfassung |
In this paper a procedure to derive synthetic flood design hydrographs (SFDH)
using a bivariate representation of rainfall forcing (rainfall duration and
intensity) via copulas, which describes and models the correlation between
two variables independently of the marginal laws involved, coupled with a
distributed rainfall–runoff model, is presented. Rainfall–runoff modelling
(R–R modelling) for estimating the hydrological response at the outlet of a
catchment was performed by using a conceptual fully distributed procedure
based on the Soil Conservation Service – Curve Number method as an excess
rainfall model and on a distributed unit hydrograph with climatic
dependencies for the flow routing. Travel time computation, based on the
distributed unit hydrograph definition, was performed by implementing a
procedure based on flow paths, determined from a digital elevation model
(DEM) and roughness parameters obtained from distributed geographical
information. In order to estimate the primary return period of the SFDH,
which provides the probability of occurrence of a hydrograph flood, peaks and
flow volumes obtained through R–R modelling were treated statistically using copulas. Finally, the shapes of
hydrographs have been generated on the basis of historically significant
flood events, via cluster analysis.
An application of the procedure described above has been carried out and results presented for the case study of
the Imera catchment in Sicily, Italy. |
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