FLOOD FORCASTING USING HEC-HMS (CASE STUDY: MAROON CATCHMENT-UPSTREAM OF BEHBAHAN)

摘要

The Maroon River, one of the Jarahi River head waters, is located in Maroon Catchment and atrnthe upstream of Behbahan City. Maroon Dam with maximum volume of 1193 MCM was builtrnon this river by Khuzestan Water & Power Authority (Dams Identity). The dam prevents fromrnseasonal high flood damages and saves large amounts of water for agricultural consumptions.rnThe river has flash floods with high peaks, so it seems that flood control and managementrnare cases of high importance in this catchment and it is necessary to have information aboutrnflood volume for flood management, downstream programming and consumption estimationrnin a water year. Therefore, runoff data were calibrated based on the real precipitation data,rnusing HEC-HMS Rainfall-Runoff Model and Schneider Method. Considering several samplernobserved floods in the past years, observed and calculated runoff values were compared andrnthe best parameters were calculated for initial & final soil infiltration and time of concentration.