Application of Snow Melt Runoff Model in a Mountainous Basin of Iran

摘要

Simulation and modeling the stream flow provide major data while it is achallenge in mountainous basins with regard to the important role of snowmeltrunoff as well as the data scarcity in these places. The main purpose of thispaper is to examine the capability of an integrated application of remotesensing data and Snowmelt Runoff Model (SRM) to simulate scheme of daily streamflow in the snow-dominated catchment, located in the North-East region of Iran.The main parameters of the model are Snow Cover Area (SCA), temperature andparticipation. Regarding to the lack of measured data, the input variable andparameters of the model are extracted or estimated based on accessible maps,satellite data and available meteorological and hydrological stations. Thechanges of snow-cover, as spatial-temporal data, which are the most effectivevariable in performance of SRM, are obtained from the Moderate ResolutionImaging Spectroradiometer (MODIS) eight-day composite snow cover images. Theevaluation of the model application efficiency was tested by the coefficient ofdetermination and the volume difference, which are 0.85% and -4.6%respectively. The result depicts the relative capability of SRM though it isevident that the more accurate the estimation of model parameters, the moreefficient simulation results can be obtained.