농업용 저수지와 토지이용변화가 유역 물순환에 미치는 영향 평가
Impact Assessment of Agricultural Reservoir and Landuse Changes on Water Circulation in Watershed
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초록
Agricultural reservoirs have a great influence on the water circulation in the watershed. It is necessary to evaluate the impact on water circulation bythe agricultural reservoir. Therefore, in this study, we simulated the agricultural watershed through linkage of Hydrological Simulation Program Fortran(HSPF) and Module-based hydrologic Analysis for Agricultural watershed (MASA) and evaluated the contribution of the agricultural reservoir to watercirculation by watershed water circulation index. As a result of simulating the Idong reservoir watershed through the HSPF-MASA linkage model, themodel performance during the validation period was R2 0.74 upstream, 0.78 downstream, and 0.76 reservoir water level, respectively. To evaluate thecontribution of agricultural reservoirs, three scenarios (baseline, present state, and present state without reservoir) were simulated, and the water balancedifferences for each scenario were analyzed. In the evaluation through the agricultural water circulation rate in the watershed, it was found that thewater circulation rate increased by 1.1%, and the direct flow rate decreased by 13.6 mm due to the agricultural reservoir. In the evaluation throughthe Budyko curve, the evaporation index increased by 0.01. Agricultural reservoirs reduce direct runoff and increase evapotranspiration, which has apositive effect on the water circulation.
Abstract
Agricultural reservoirs have a great influence on the water circulation in the watershed. It is necessary to evaluate the impact on water circulation bythe agricultural reservoir. Therefore, in this study, we simulated the agricultural watershed through linkage of Hydrological Simulation Program Fortran(HSPF) and Module-based hydrologic Analysis for Agricultural watershed (MASA) and evaluated the contribution of the agricultural reservoir to watercirculation by watershed water circulation index. As a result of simulating the Idong reservoir watershed through the HSPF-MASA linkage model, themodel performance during the validation period was R2 0.74 upstream, 0.78 downstream, and 0.76 reservoir water level, respectively. To evaluate thecontribution of agricultural reservoirs, three scenarios (baseline, present state, and present state without reservoir) were simulated, and the water balancedifferences for each scenario were analyzed. In the evaluation through the agricultural water circulation rate in the watershed, it was found that thewater circulation rate increased by 1.1%, and the direct flow rate decreased by 13.6 mm due to the agricultural reservoir. In the evaluation throughthe Budyko curve, the evaporation index increased by 0.01. Agricultural reservoirs reduce direct runoff and increase evapotranspiration, which has apositive effect on the water circulation.
참고문헌 (26)
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