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자료유형
학술저널
저자정보
저널정보
한국환경영향평가학회 환경영향평가 환경영향평가 제14권 제3호
발행연도
2005.1
수록면
97 - 107 (11page)

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The purpose of this study is to develop a system, which estimates watershed pollutant loadingrate through the combination of GIS and computational mode. Also, the applicability of thisstudy was estimated by the application of the above system for Chuncheon City. The detailedresults of these studies are as follows;The pollutant loading estimation system was developed for more convenient estimation ofpollutant loading rate in watershed, and the system load was minimized by the separation ofestimation module for point and non-point source. This system on the basis of GIS is veryeconomical and efficient because it can be applied to other watershed with the watershed map.System modification is not needed.The pollutant loading estimation system for point source was developed to estimate thepollutant loading rate in watershed through the extraction of the proper data from all districtsand yearly data and the execution of spatial analysis which is main function of GIS. From theverification result of spatial analysis, real watershed area and the administrative districtareaextracted by spatial analysis were 1,114,893,340.15m2 and 1,114,878,683.68m2, respectively. Itshows that the spatial analysis results were very exact with only 0.001% error. The pollutant loading estimation system for non-point source was developed to calculate the pollutant loading rate through the overlaying of land-use and watershed map after the construction of new land-use map using the land register database with most exact land use classification. Application result for Chuncheon City shows that the proposed system results in one percent land use error while the statistical method results in five percent. More exact nonpoint source pollutant loading was estimated from this system.

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