simulation of runoff on murun dam watershed (idanak) using by

in iran, most mountainous watersheds do not have enough hydrometery stations and defective stations have sparse data. because of limited availability of hydrologic data, watershed modeling plays a crucial role in development of local resources. in this study, swat was applied to simulate runoff in marun dam (idanak) watershed, a sub-basin of marun catchment. calibration and sensivity analyses were performed with sufi-2 program. the model was run for period of 1994-2006and data of one hydrometery station at idanak watershed were used for calibration and validation. for calibration of monthly runoff, the nash-sutcliffe, r2, p-factor and d-factor were 0.63, 0.73, 0.59 and 1.23 and for validation, these values were 0.70, 0.75, 0.67 and 1.05 respectively. the results showed that swat could be a proper tool for simulating the flow rate values of the river.