2013•International Journal of Hydraulic EngineeringOpen access

Simulation of Event Based Runoff Using HEC-HMS Model for an Experimental Watershed

Reshma Talari, Venkata Reddy K, Deva Pratap

Abstract

Estimation of accurate runoff for a g iven rainfall event is a difficu lt task due to various influencing factors. Several co mputer based hydrological model have been developed for simu lation of runoff in watershed and water resource studies. In this study, Hydrologic Engineering Center -Hydrologic Modeling System (HEC-HMS) hydrological model has been used to simu late runoff process in Walnut Gulch watershed located in Arizona, USA. To co mpute infilt ration, rainfall excess conversion to runoff and flow routing, methods like Green-A mpt, Clark's Unit hydrograph and Kinemat ic wave routing were chosen. The model has been calibrated and validated for the seven rainfall events. Fro m the results, it is observed that HEC-HMS model has performed satisfactorily for the simulat ion runoff fo r the different rainfall events.

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Key concepts: Watershed, Hydrograph, Surface runoff, HEC-HMS, Environmental science, Hydrology (agriculture), Vflo, Routing (electronic design automation)