Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Analysis of Road-to-Stream Linkage Characteristics in a Mountain Catchment using the Discriminant Analysis

판별분석을 이용한 산악지역 도로-하천 연결 특성 분석

  • Park, Sang-Hyoung (Research Planning Team, National Institute for Disaster Prevention) ;
  • Park, Changyeol (School of Civil, Environment and Architectural Engineering, Korea University) ;
  • Yoo, Chulsang (School of Civil, Environment and Architectural Engineering, Korea University)
  • 박상형 (국립방재연구소 연구기획팀) ;
  • 박창열 (고려대학교 공과대학 건축사회환경공학부) ;
  • 유철상 (고려대학교 공과대학 건축사회환경공학부)
  • Received : 2010.07.26
  • Accepted : 2011.01.28
  • Published : 2011.03.30
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Abstract

This study analyzed the linkage characteristics between road runoff and the nearest streams in mountain regions using a discriminant analysis. The road-to-stream linkage is an important characteristic to evaluate whether the contaminant on road surface is transported directly into the nearby channel system. This study evaluated a total of 51 drainage outlets of mountain roads near the Soyanggang Dam. The linkage between road and stream, slope and width of road, and other information necessary for the discriminant analysis have been collected by in situ investigation and by analyzing the Digital Elevation Model. Finally, as independent variables in the discriminant analysis, the contributing road representing the road characteristics (similar to the runoff from the road drainage outlet) and the distance and slope of the connecting channel between road and nearest stream were selected. Among these three, the distance was found to have the highest discriminant power, the contributing road the lowest. Using the discriminant function derived, 40 out of 51 cases (78.4%) were correctly discriminated and the remaining 11 cases (21.6%) were wrongly discriminated. Reasons of wrongly discriminated cases were mainly due to change in drainage outlet direction, excessive runoff, change in road-to-stream path, etc. This result also indicates that the road-to-stream linkage can be introduced or prohibited by exactly the same way.

Keywords

Acknowledgement

Supported by : 한국연구재단

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