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Three geomorphological rainfall-runoff models based on the linear reservoir concept

Auteur(s) et Affiliation(s)

NOURANI, V.
Fac. of Civil Eng., Univ., Tabriz, Iran, Republique Islamique d'
SINGH, V.P.
Fac. of Biological and Agricultural Eng., Univ., Texas, Etats-Unis
DELAFROUZ, H.
Fac. of Civil Eng., Univ., Tabriz, Iran, Republique Islamique d'


Description :
Three geomorphological models, based on linear reservoirs cascade, are developed; two of the models are unit hydrograph (UH) models and one contains a non-linear routing approach. In the first UH model, each sub-basin is represented as a cascade of equal linear reservoirs (Nash's model) which directly discharges to the watershed oulet through a linear channel. In the second UH model each sub-basin is represented as a linear reservoir arranged in a sequence based on the drainage network. Two important properties of these three models are that they consider the effect of watershed geomorphology and include only one parameter which can be estimated using observed rainfall-runoff data. GIS tools are used for determining the watershed geomorphological parameters. The results of these models are compared with the Nash's black box and the geomorphological SCS models for the Amameh watershed, Iran. Although the results show that the proposed models yield good efficiency in rainfall-runoff modeling, the semi-distributed routing ability in the second and third models produces better results.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2009, vol. 76, n°. 3, p. 206-214, nombre de pages : 9, Références bibliographiques : 32 ref.

Date :
2009

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais
Droits :
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