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Map of runoff potential, have various applications in the Hydrogeomorphology, including identifying potential of flooding, erosion and sediment yield a conditions. Often sub-basins as a study unit is used for this purpose. but The sub-basins have not homogeneity conditions in the vegetation and topography to calculate the producing of runoff. In this study, a new approach, hydrologic response units (HRU) was introduced as a unit of work, and Gare-Soo basin and also feature identification and extraction of the runoff is calculated separately for each unit. and the ability to produce runoff using the Soil Conservation Service (SCS) has been done. The results of study, sixteen of hydrologic response to Gare-Soo basin shows that each unit has the same geomorphology, topography and vegetation. The eight hydrologic response units due to the high potential of producing runoff, with most processes water excavation and scour phenomenon was detected that the type of land use has a significant role. It seems that using of the hydrological response unit, as a unit of work is more effective in accurate identification in the basin runoff ability and erosion conditions.