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Environmental Engineering Research 1997;2(2): 73-81.
Identifying Critical Areas of Urban Water Pollution Using a GIS
Kyehyun Kim1, Dongil Jung2, Juwan Kim3, Jungdan Choi3, Mangyu Sung3, and Sungryong Ha4
1Department of Geoinformatic Engineering, Inha University, Yonghyundong, Inchon, Korea 402-751
2National Institute of Environmental Research, Bulkwangdong 280-17, Eunpyunggu, Seoul, Korea 122
3Systems Engineering Research Institute, P.O.Pox 1, Yusung, Taejon, Korea 305-333
4Department of City Planning, Chungbuk National University, Chongju, Chungbuk, Korea 360-763
Corresponding Author: Kyehyun Kim ,Tel: +82-32-860-7602 , Email: kyehyun @dragon.inha.ac.kr
Received: July 6, 1996;  Accepted: April 6, 1997.
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Geographical Information System (GIS) was used to estimate the magnitude of water pollution from an area with major land uses of urban and agricultural in South Han River watershed. A digital elevation model (DEM) made from SPOT satellite imagery was used to delineate sub-basin boundaries. GIS coverages and attributes for the individual sub-basin areas were generated to obtain the data necessary for estimating point and nonpoint pollutant loadings. Point source loadings were mainly counted from population, industry, livestock, and wastewater treatment plants while nonpoint source loadings were counted from land use activities. Major pollutant loadings of Biochemical Oxygen Demand (BOD), Total Nitrogen (TN), and Total Phosphorus (TP) were calculated for each sub-basin to identify' the critical areas with higher pollutant loadings. An analysts of pollutant loadings was made to identify major factors contributing to pollutant loadings.
Keywords: Geographical Information System | DEM | Coverage | Point Source Pollution | Nonpoint Source Pollutioa
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