농업용 저수지 및 관개지구를 고려한 농업유역 물순환율 개발

Abstract

The water circulation in agricultural watersheds changes with the operation of agricultural reservoirs, it is necessary to classify and evaluate them intoupstream, agricultural reservoirs, irrigation districts, and downstream. Therefore, in this study, we developed the agricultural water circulation rate(AWCR) considering an agricultural reservoir and irrigation district by improving the water circulation rate of the Water environmental conservationAct. we applied it to Jinwi watershed using the module-based hydrologic analysis system to simulate the water circulation for agricultural reservoirsand irrigation areas. The model performance during the validation period was NSE of 0.762 for the downstream stream and 0.682 for the reservoirlevel. And the hydrograph separation model was applied to separate the direct and baseflow. As a result of this study, The AWCR of Jinwi watershedwas 71.8% on average, which was higher than the water circulation rate estimated by the downstream hydrograph separation.