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| Titel |
Advances in rainfall-runoff estimation using the NRCS-CN model in a changing
climate in semiarid zones in both the northern and southern hemispheres |
| VerfasserIn |
Pablo Durán-Barroso, Maria João Simas Guerreiro, Eunice Maia De Andrade, Javier González |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250135284
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| Publikation (Nr.) |
 EGU/EGU2016-16131.pdf |
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| Zusammenfassung |
| Extreme events runoff is one of the most important variables in water resources
management, but its quantification in semiarid watersheds is not easy, especially
because of their large retention capacity. In the worldwide used NRCS Curve Number
model (CN), retention capacity is conditioned by the initial abstraction parameter,
for which this manuscript questions its assessment procedure. We propose a more
accurate procedure to compute the initial abstractions based on previous cumulative
dry days (CDD). We also analyze the combined effect of initial abstractions and
climatic characteristics by analyzing CN in a dry (Walnut Gulch, US) and wet (Ceará,
Brazil) semiarid environment. With this new methodology and the evolution of
rainfall volumes and CDD analysis, it is possible to suggest consequences of climate
change on floods forecast of extreme rainfall-runoff events in a semiarid environment. |
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