Relationship between Rainfall-Runoff using SCS-CN and Remote Sensing Technique in Upper-Helmand River Basin, Afghanistan

For the design of hydraulics structures, rainfall-runoff relationship is one of the most important aspects. The present study revealed the runoff estimation using SCS-CN method with Arc-GIS and remote sensing for Upper-Helmand river basin, Afghanistan. SCS-CN method can be effectively used for the runoff estimation which is now being used worldwide. It depends upon only few number of parameters, such as Curve Number (CN) and precipitation. The LULC map and HSG map are prepared using Arc-GIS for Upper-Helmand river basin to Generate CN.