عنوان مقاله [English]
The aim of this study, is to evaluate the effect of loss methods application on run-off volume and hydrograph shape used by hydrologic models. In this research, four loss methods including constant loss (φ index), initial loss-loss rate, SCS and constant fraction approach were applied to be evaluated. To do this, Clark Rainfall-Runoff model was applied for 24 storm events from kasilain basin. Then, the characteristics of calculated hydrographs were compared with the same characteristics of the same observed hydrographs. The result of statistical analysis showed that methods of SCS, initial loss-loss rate, constant loss (φ index) and constant fraction loss have relative advantage respectively to be used for the mentioned basin.
Key words: Loss methods, Kasilian, Flood Hydrograph, Clark