Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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Changes and Influences of Stream Water Quantity due to Urbanization: Focusing on Urban Streams in Gyeonggi-do

도시화에 따른 하천수량 변화 및 영향_경기도 도심하천을 중심으로

  • Noh, Huiseong (Hydro Science and Engineering Research Institute, KICT) ;
  • Jo, Dongho (Department of Water Resources, ISAN Corporation) ;
  • Kim, Yonsoo (Department of Insurance Business Service Division, LIG System Co., Ltd.) ;
  • Ahn, Taejin (Department of Civil, Safety & Environmental Engineering, Hankyong National University)
  • 노희성 (한국건설기술연구원 수자원.하천연구소) ;
  • 조동호 ((주)이산 수자원부) ;
  • 김연수 ((주) LIG시스템 손보서비스본부) ;
  • 안태진 (한경대학교 토목안전환경공학과)
  • Received : 2017.10.18
  • Accepted : 2017.11.07
  • Published : 2017.11.30
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Abstract

Stream water quantity is the most basic, fundamental and important element for stream water quality and for conservation of ecological environment. This study aims to analyze causes of changes in stream water quantity based on the percentage of impervious surface area (%ISA) in urban streams of Gyeonggi-do, and also to present a method to secure water quantity of urban streams in Gyeonggi-do and data to be applied to River Management Policy. For this purpose, the Anyangcheon watershed, the Tancheon watershed, and the Osancheon watershed were selected as samples of the urban streams. In addition, the stream water quantity and the changes in stream water quality which were based on the amount of ISA, and methods to directly and indirectly secure stream water quantity were investigated. The results are as follows. The amounts of ISA of the Anyangcheon watershed, of the Tancheon watershed, and of the Osancheon watershed showed a 5.32%, 6.32%, and 7.22% increase, respectively, from 2014 which was approximately 10 years ago. The runoff coefficient generally increased as the amount of ISA was increased. Water reuse quantity of stream in the Tanchon watershed had a positive effect on securing stream water quantity, but both in the Anyangcheon watershed and in the Osancheon watershed, it did not have a positive effect on that. However, water reuse quantity of stream improved the water quality of each stream.

하천수량은 하천의 수질, 생태환경보전에 있어 가장 근원적이고 기본적인 사항으로 매우 중요한 요소이다. 본 연구의 목적은 경기도 도심하천의 불투수면적률에 따른 하천수량 변화 원인 및 영향을 분석하여, 경기도 도심하천의 하천수량 확보 방안 및 하천관리 정책에 반영할 있는 자료를 제시하는 것이다. 이를 위해 안양천유역, 탄천유역, 오산천유역을 표본 도심하천으로 선정하고, 불투수면적률(%ISA)에 따른 하천수량 및 수질의 변화와 직 간접적인 하천수 확보방안을 검토하였다. 그 결과를 정리하면 다음과 같다. 안양천유역, 탄천유역, 오산천유역의 불투수면적률은 2014년을 기준으로 약 10년전 보다 각각 5.32%, 6.32%, 7.22% 증가하였으며, 전반적으로 불투수면적률이 증가할수록 유출계수는 증가하는 경향을 보였다. 하천 재이용수량은 탄천유역에서 하천수 확보에 긍정적 효과가 나타났지만 안양천유역과 오산천유역은 하천수 확보 효과가 미흡하였다. 그러나 하천 재이용수량으로 인해 각 하천 수질등급이 개선되는 것으로 나타났다.

Keywords

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