Abstract
Increased runoff and flood management has become more difficult as a result of climate change and land use change. Hydrological modeling is a crucial and decisive tool to estimate the hydrological process and the water resources availability. This study aims to develop a hydrological model for the Hasdeo River basin which is a tributary of Mahanadi River, Chhattisgarh, to examine the effects of rainfall on surface runoff and peak discharges. The model also incorporates ArcGIS extension, i.e., HEC-GeoHMS for the spatial analyst to develop a number of hydrologic modeling inputs. To compute runoff volume, peak runoff rate, base flow, and flow routing methods, SCS Curve Number method, SCS unit hydrograph, Recession method, and Muskingum routing methods are chosen respectively. Model calibration both manually and automatically (i.e., by optimization method), validation, and sensitivity analysis have been done. The Nash-Sutcliffe model efficiency criterion, the percentage error in volume, coefficient of determination (R2), and percentage bias of observed and simulated flow were used for the calibration model. The results are ranges from (0.43 to 0.64), (3.00 to 8.20), (0.7 to 0.8), and (3.02 to 7.76) respectively. Finally, it can be concluded that the model can be used with reasonable approximation in hydrologic simulation in the Hasdeo watershed.
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