Application research of SCS model based on GIS grid in Binjiang Basin

By means of GIS method, the digital elevation model (DEM) of Binjiang Basin was established, and the boundary of the basin was drawn. Based on SCS model, the Grid SCS model was established; with witch the flood volumes were computed. This research indicates that the Grid SCS model can calculate the spatial distribution of the runoff and the calculation precision of runoff yield is improved.