Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Application of a Watershed-Based Land Prioritization Model for the Protection of Drinking Water Reservoir

상수원 보호를 위한 유역기반 토지관리 우선순위 모델 적용

  • Lee, Jee Hyun (Department of Environmental Science and Engineering, College of Engineering Ewha Womans University) ;
  • Choi, Ji Yang (Division of Environmental Policy, Korea Environment Institute) ;
  • Park, Seok Soon (Department of Environmental Science and Engineering, College of Engineering Ewha Womans University)
  • 이지현 (이화여자대학교 공과대학 환경학과) ;
  • 최지용 (한국환경정책.평가연구원, 정책연구부) ;
  • 박석순 (이화여자대학교 공과대학 환경학과)
  • Received : 2003.04.25
  • Accepted : 2004.08.23
  • Published : 2004.09.30
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Abstract

Due to the growing impact of non-point source pollution and limitation of water treatment technology, a new policy of water quality management, called a source protection, is now becoming more important in drinking water supply. The source protection means that the public agency purchases the pollution sensitive area, such as riparian zone, and prohibit locations of point and non-point sources. Many studies have reported that this new policy is more economical in drinking water supply than the conventional one. However, it is very difficult to determine location and size of the pollution sensitive zone in the watershed. In this paper, we presented the scientific criteria for the priority of the pollution sensitive zone, along with a case study of the upstream watershed of the Paldang Reservoir, Han River. This study includes applications of the analytical hierarchy process(AHP) and a watershed-based land prioritization(WLP) model. After major criteria affecting water quality were selected, the AHP and geographic analysis were performed. The WLP model allowed us to include both quantity and quality criteria, using AHP as the multi-criteria method in making decision and reflecting local characteristics and various needs. By adding a travel-time function, which represents the prototype effectively, the results secured adaptability and scientific objectivity as well. As such, the WLP model appeared to provide reasonable criteria in determining the prioritization of land acquisition. If the tested data are used with a validated travel-time and AHP method is applied after further discussion among experts in such field, highly reliable results can be obtained.

Keywords

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