Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Analysis of Baseflow Contribution to Streamflow at Several Flow Stations

수계별 주요 유량 지점에 대한 강수량과 기저유출 기여도 분석

  • Choi, Youn Ho (Department of Water Environment Research, National Institute of Environmental Research) ;
  • Park, Youn Shik (Agricultural Biological Engineering, Purdue University) ;
  • Ryu, Jichul (Department of Water Environment Research, National Institute of Environmental Research) ;
  • Lee, Dong June (Department of Regional Infrastructures, Kangwon National University) ;
  • Kim, Yong Seok (Department of Water Environment Research, National Institute of Environmental Research) ;
  • Choi, Joongdae (Department of Regional Infrastructures, Kangwon National University) ;
  • Lim, Kyoung Jae (Department of Regional Infrastructures, Kangwon National University)
  • 최윤호 (국립환경과학원 유역총량연구과) ;
  • 박윤식 ;
  • 류지철 (국립환경과학원 유역총량연구과) ;
  • 이동준 (강원대학교 지역건설공학과) ;
  • 김용석 (국립환경과학원 유역총량연구과) ;
  • 최중대 (강원대학교 지역건설공학과) ;
  • 임경재 (강원대학교 지역건설공학과)
  • Received : 2014.04.24
  • Accepted : 2014.07.29
  • Published : 2014.07.30
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Abstract

Streamflow is typically divided into two components that are direct runoff and baseflow, it is required to analyze and estimate behaviors of those two flow components to understand watershed characteristics so that watershed management plan can be effective in pollutant reductions. Since pollutant load behaviors in a stream or river are variable by flow component behaviors, best management practices need to be applied in a watershed based on the pollutant load behaviors varying with flow components. Thus, baseflow behaviors were analyzed separating baseflow from streamflow data collected from fifteen streamflow gaging stations in the 4 major river watersheds which are the Han river, Nakdong river, Guem river, and Yeongsan Somjin river watersheds. Moreover, precipitation trends throughout the 4 River Systems were investigated, thus daily precipitation data were collected from sixty-five locations. The Hank river watershed displayed the largest precipitation (925.2 mm) in summer but the lowest precipitation (71.8 mm) in winter, indicating the watershed has the most fluctuating precipitation characteristic. While the precipitation trends in the Four River Systems varied, a distinct feature in baseflow trends was not found, moreover baseflow percentages to streamflow were typically greater than 50% in the Four River Systems. As shown in this study, it would be expected significant amount of pollutants could be contributed to the stream in the form of baseflow at the watershed.

Keywords

References

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