Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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An Analysis on Water Pollution Degree by the Watershed considering Landcover Types in the Mid-Nakdong River

낙동강중류의 토지피복형태를 고려한 유역별 수질오염도 분석

  • Lee, Woo-Sung (Department of Landscape Architecture, Kyungpook National University) ;
  • Jung, Sung-Gwan (Department of Landscape Architecture, Kyungpook National University) ;
  • Park, Kyung-Hun (Department of Environmental Engineering, Changwon National University) ;
  • You, Ju-Han (Chungcheongbuk-do Research Center for Wild Plants)
  • Published : 2006.04.01
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Abstract

The purpose of this study is to evaluate the water pollution degree in the Mid-Nakdong River watershed regarding to landcover types using GIS method. As a result of landcover classification, rate of urban appeared highly on Daegu Metropolitan city. Also, rate of agriculture showed highly in the riparian zones of the Nakdong and Guemho River and rate of forest appeared highly in the borders of the study area. To identify the groups of watershed with similar landcover patterns using the Cluster Analysis. According to the cluster analysis, the fifty sub-watersheds were grouped in three clusters, 'Urban watershed', 'Agriculture watershed', 'Forest watershed'. The proportion of urban area in each cluster had a positive correlation with water pollution degree. Otherwise, the proportion of agriculture in the Agriculture watershed had a high positive correlation with water pollution degree. Therefore, it is necessary to estimate environmental capacity of water duality considering ecological and environmental characteristics of watershed ecosystem and expand water duality monitoring systems to small stream.

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