Journal of the Korean Society of Hazard Mitigation (한국방재학회 논문집)

Korean Society of Hazard Mitigation (한국방재학회)
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Improvement of Instream Flow Evaluation Methodology and Application

하천유지유량 산정방법의 개선과 적용

  • Kang, Seongkyu (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Yoo, Chulsang (School of Civil, Environmental and Architectural Engineering, College of Engineering, Korea University) ;
  • Lee, Dongryul (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Choi, Sijung (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
  • 강성규 (한국건설기술연구원 수자원.하천연구소) ;
  • 유철상 (고려대학교 건축사회환경공학부) ;
  • 이동률 (한국건설기술연구원 수자원.하천연구소) ;
  • 최시중 (한국건설기술연구원 수자원.하천연구소)
  • Received : 2015.12.01
  • Accepted : 2015.12.10
  • Published : 2016.02.29
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Abstract

The instream flow is the flow that should be remained in the river for protecting aquatic ecosystem and various natural resources. The first appearance of its concept was 1960's in the law of the Korea. 'Instream Flow Guideline' was built in mid 1990s by government and the term 'instream flow' appeared in the Korean River Act. In late 1990s, instream flows for major rivers were calculated and officially notified in 2006 for management and monitoring. 'Instream Flow Guideline' revised in 2009 and nation wide evaluation project of instream flow had conducted from 2007 to 2011 according to this new guideline. After this project, the instream flows of tributaries was made to public announcement in 2015. The concepts of instream flow abide by time periods, laws and regulations are shown in this study. Hydrological method which contains concept of natural flow regime is essential for evaluating instream flow. Also requirement flows of instream flow should be decreased to 4 types from present 8 types. This new evaluation method applied in the Keumgang river.

하천유지유량이란 수 생태계 및 하천과 관련이 있는 다양한 자연 자원의 보호와 보전을 위해 하천에 남아 흘러야 하는 물이다. 우리나라에서 하천유지유량의 개념이 처음 법에 나타난 것은 1960년대이다. 이후 1990년대 중반 하천유지유량 산정요령이 만들어졌고 하천법에 하천유지유량이라는 용어가 등장하게 된다. 1990년대 후반 주요 하천에 대해 하천유지유량이 산정되었으며, 국가가 2006년 이들 하천유지유량을 고시하고 관리하고 있다. 2009년 하천유지유량 산정요령이 개정되었고 이에 따라 국토교통부는 전국단위의 하천유지유량 재산정 사업을 수행하였다. 그 과정에서 추진된 4대강 살리기 사업의 영향으로 본류구간을 제외한 지류하천의 하천유지유량이 2015년 고시되었다. 본 연구에서는 우리나라 하천유지유량의 개념과 산정방법을 법과 제도적 측면, 기술적 측면에서 살펴보았다. 또한 하천수 사용을 고려한 개선방법으로 유황을 고려한 수문학적 방법의 도입과 필요유량 항목을 현행 8개에서 4개로 조정하고 그 목적을 분명히 해야 함을 제시하였으며, 금강유역에서의 적용결과를 함께 나타내었다.

Keywords

Acknowledgement

Supported by : 국토교통부

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