摘要：The present study highlights on the application of an Integrated Water Resources Management (IWRM)tool, Water Evaluation and Planning (WEAP) system model for hydrologic simulation of Mahanadi riverbasin in India. A monthly time step hydrologic model was developed using rainfall-runoff method incorporatedin WEAP with an aim to address the challenge of water resources estimation in Mahanadi basin. Themodel was set-up without taking into account effects of development and it was calibrated againstmeasured flow data available at six gauging stations. A good agreement was observed betweensimulated and measured flow after calibration. Crop coefficient (Kc) and effective precipitation are theparameters changed during calibration. The range of calibrated parameters was found as ± 5 % and± 1 % for Kc and effective precipitation respectively for different catchments. The simulation of streamflow using calibrated values revealed that, in most cases, the variation between measured andsimulated stream flow values is less than 10%. This shows the good agreement with measured databy using calibrated parameters. The calibrated and validated model can be applied for runoff simulationsin other basins with similar hydro-meteorological conditions. The results of the study demonstrate thepotential of using WEAP model for water resource management and assessment of future resourcedevelopment in the basin.
