익산 밭경지 특성을 고려한 초생대 유출 및 유사 저감효과 모의
Simulations of Reduction Effects on Runoff and Sediment for VFS Applications by Considering Uplands Characteristics in Iksan
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The goal of this study was to evaluate sediment reduction effects of VFS (vegetative filter strip) applied for Iksan area in Saemangeum watershed. Thisstudy simulated runoff and sediment load from different types of uplands using VFSMOD-W. The general upland characteristics of the study area wasinvestigated to build reasonable scenarios of the simulation. The simulation scenarios were designed by various areas, shapes, and slopes of uplands. Grassmixture was selected as VFS vegetation and the size of VFS was fixed as 10 % of uplands area. Additionally 50mm, 100mm, 150mm of daily rainfall wereapplied for the runoff and sediment simulation. As results, the calculated runoff and sediment loads were obtained 20.7∼1,030.6 m3 and 568.4∼675,731.4 kg for the range of 0.1∼1.0 ha of uplands with 7 % and 15 % slopes. The reduction effects on runoff and sediment were obtained 5∼10 % and21.0∼47.7 % respectively from VFS applications. The VFSMOD-W simulations showed that runoff tended to increase as upland area and amount ofrainfall increased while sediment increased when slope, length and area of uplands and amount of rainfall increased. These results indicated that rainfallamount and upland size are the critical factors for the generation of runoff and sediment load. In order to support this conclusion, further studies such as,long term monitoring, field experiments, and to calibrate and evaluate the model are necessary.
Abstract
The goal of this study was to evaluate sediment reduction effects of VFS (vegetative filter strip) applied for Iksan area in Saemangeum watershed. Thisstudy simulated runoff and sediment load from different types of uplands using VFSMOD-W. The general upland characteristics of the study area wasinvestigated to build reasonable scenarios of the simulation. The simulation scenarios were designed by various areas, shapes, and slopes of uplands. Grassmixture was selected as VFS vegetation and the size of VFS was fixed as 10 % of uplands area. Additionally 50mm, 100mm, 150mm of daily rainfall wereapplied for the runoff and sediment simulation. As results, the calculated runoff and sediment loads were obtained 20.7∼1,030.6 m3 and 568.4∼675,731.4 kg for the range of 0.1∼1.0 ha of uplands with 7 % and 15 % slopes. The reduction effects on runoff and sediment were obtained 5∼10 % and21.0∼47.7 % respectively from VFS applications. The VFSMOD-W simulations showed that runoff tended to increase as upland area and amount ofrainfall increased while sediment increased when slope, length and area of uplands and amount of rainfall increased. These results indicated that rainfallamount and upland size are the critical factors for the generation of runoff and sediment load. In order to support this conclusion, further studies such as,long term monitoring, field experiments, and to calibrate and evaluate the model are necessary.
참고문헌 (29)
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