Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Development and Evaluation of Sediment Delivery Ratio Equation using Clustering Methods for Estimation of Sediment Discharge on Ungauged Basins in Korea

국내 미계측 유역의 유사유출량 예측을 위한 군집별 유사전달율 산정식 도출 및 평가

  • Lee, Seoro (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Park, Sang Deog (Department of Civil Engineering, Gangneung-Wonju National University) ;
  • Shin, Seung Sook (Department of Civil Engineering, Gangneung-Wonju National University) ;
  • Kim, Ki-sung (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Kim, Jonggun (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Lim, Kyoung Jae (Department of Regional Infrastructure Engineering, Kangwon National University)
  • 이서로 (강원대학교 지역건설공학과) ;
  • 박상덕 (강릉원주대학교 토목공학과) ;
  • 신승숙 (강릉원주대학교 토목공학과) ;
  • 김기성 (강원대학교 지역건설공학과) ;
  • 김종건 (강원대학교 지역건설공학과) ;
  • 임경재 (강원대학교 지역건설공학과)
  • Received : 2018.08.28
  • Accepted : 2018.09.21
  • Published : 2018.09.30
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Abstract

Sediment discharge by rainfall runoff affects water quality in rivers such as turbid water, eutrophication. In order to solve various problems caused by soil loss, it is important to establish a sediment management plan for watersheds and rivers in advance. However, there is a lack of sediment data available for estimating sediment discharge in ungauged basins.. Thus, reasonable research is very important to evaluate and predict the sediment discharge quantitatively. In this study, cluster analysis was conducted to classify gauged watersheds into hydrologically homogeneous groups based on the watershed characteristics. Also, this study suggests a method to efficiently predict the sediment discharge for ungauged basins by developing and evaluating the SDR equations based on the PA-SDR module. As the result, the SDR equations for the classified watersheds were derived to predict the most reasonable sediment discharge of ungauged basins with 0.24 % ~ 10.89 % errors. It was found that the optimal parameters for the gauged basins reflect well characteristic of sediment movement. SDR equations proposed in this study will be available for estimating sediment discharge on ungauged basins. Also it is possible to utilize establishing the appropriate sediment management plan for integrated management of watershed and river in Korea.

Keywords

References

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