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WAMIS 토지피복도를 활용한 토양유실량 분석 -무심천 유역을 대상으로-
김주훈 ( Joo Hun Kim ),이충대 ( Chung Dae Lee ),김경탁 ( Kyung Tak Kim ),최윤석 ( Yun Seok Choi ) 한국지리정보학회 2007 한국지리정보학회지 Vol.10 No.4
This study estimates how soil loss in a basin has been occurred according to the change of land cover, and analyzes which type of land cover has the largest soil loss by classifying the land-cover type into each area and a whole basin. Musimcheon, the second branch stream of GeumGang, is chosen as a research area. The result of analysis shows that the average soil loss occurs most largely in a crop land and a paddy field. The yearly soil loss of watershed estimates approximately 14,000 ton/yr in case of using 100-year-frequency rainfall data. A forest area, which takes the largest area in watershed, shows the soil loss occurs approximately 1,000ton/yr. A crop field shows that soil loss increased most largely 4,900 ton/yr (34.6%) in 1985 to 8,100 ton/yr (56.1%) in 2000. The change of land cover in a crop land increased 8% to 14%, and this change influences on the increase of soil loss. As a result of analyzing the area over 200ton/㎢/yr, the soil loss in a crop field accounts for 74% to 96%.
심순보,이충대 충북대학교 건설기술연구소 2003 建設技術論文集 Vol.22 No.2
This research involves the integration of the HEC Hydrologic Modeling System(HEC-MMS) and HECRiver Analysis System (HEC-RAS) with Geographic Information Systems (GIS) to develop a regional model for floodplain determination and representation. HEC-RAS is designed to aid in the determination of water surface profiles associated based on inputs describing the channel shape, hydraulic parameters, and flow. HEC-HMS is designed to simulate the precipitation-runoff processes of dendritic watershed systems. The purpose of this study is created visual floodplain map from water surface profile calculated by HEC-RAS model. Recent developments in GIS-based tools can alleviate some of these shortcomings. Developments in GIS applications allow it to work in conjunction with hydrologic and hydraulic models thus reducing the need for field survey data and making the floodplain mapping process more automated and visual. These models is consist of HEC-RAS cross-section coordinate data and DEM(digital elevation model) of study area. The resulting surface model provides a good representation of the general landscape and contain additional detail the stream channel. The results of the study present that GIS is obvious to effective environmental for floodplain mapping and analysis. In this sturdy, the methodology is applied to Mushim stream, located in Cheongju, Korea.