APPLICATION OF HEC-HMS MODEL FOR RUNOFF SIMULATION: A CASE STUDY OF KANKAI RIVER BASIN IN NEPAL
- Vol,41(2), Apri
- Roorkee Indian Water Resources Society 2021
- 14-19p
Nepal is the world’s second-richest country in water resources after Brazil. Most of Nepal’s rivers area unit either ungauged or poorly gauged due to extreme terrains and climatical condition, and lack of technical and support. Hence, the hydrological model’s role is beneficial for adequately managing water resources to gain the optimum benefits. The present study concerns simulating the Kankai River Basin (KRB) flow and validating the flow at the gauge station at Mainachuli. Furthermore, estimation and analysis of discharges for each sub-basins of the KRBhave been performed in this study. The HEC-HMS hydrologic model is used to calibrate (from 1992-1999) and validate (from 2000-2008) the KRB. The primary data required as input includes precipitation, Digital elevation model, soil data, land-use land cover data as spatial data for basin model preparation in HMS. Furthermore, various temporal data like time series of daily rainfall and daily discharge, Evapo-transpiration data has been used to develop the metrological model. The model performance was tested for the geographic area throughout the standardization and validation using the parameters like Nash Sutcliffe Efficiency(NSE) and co-efficient of determination(R²). The results obtained were found to be satisfactory and accepted for simulation of runoff. Thus, this study shows that the HEC-HMS hydrological model can be a suitable modelfor the KRBfor further assessment and prediction of simulation of the hydrological responses. So it will be fruitful to carry on more studies that incorporate the land-use amendment of the basin within the model.