Hydrologic modeling using GIS. Evaluating the surface runoff using SCS-CN model 

 ABSTRACT. - Hydrologic modeling using GIS. Evaluating the surface runoff using SCS-CN model. The SCS-CN method is one the most popular method for computing surface runoff for rainfall event. This approach involves the use of simple empirical formula and readily available tables and curves. It is only one method, which can incorporate the land-use for computation of runoff from rainfall. SCS-CN method provides a rapid means for estimating runoff change due to land-use change. This article describes the methodology used to build and test the model for Ocna Sibiului Lake, taking into account a period of twenty-nine years (1971-2000).

Keywords: hydrologic modelling, GIS, surface runoff, rainfall, modelling