Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Change characteristic of basin topographical parameters according to the threshold area of minimum order stream

최소차 하천의 임계면적에 따른 유역 지형매개변수의 변화특성

  • Ahn Seung-Seop (Dept. of Urban Information & Cadastral Engi., Kyungil University) ;
  • Park Ro-Sam (School of Civil Engineering, Kyungil University) ;
  • Kim Jong-Ho (School of Civil Engineering, Kyungil University) ;
  • Lim Ki-Seok (Dept. of Urban Information & Cadastral Engi., Kyungil University) ;
  • Song Si-Hoon (National Institute of Environmental Research, Ministry of Environment)
  • 안승섭 (경일대학교 도시정보지적공학과) ;
  • 박노삼 (경일대학교 토목공학부) ;
  • 김종호 (경일대학교 토목공학부) ;
  • 임기석 (경일대학교 도시정보지적공학과) ;
  • 송시훈 (환경부 국립환경연구원)
  • Published : 2005.01.01
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Abstract

The size of minimum order stream has a very sensitive effect on runoff analysis model using the divergence characteristic of stream. Therefore, in this study, the threshold area of minimum order stream has been examined the change characteristic of topographical parameters. The subject basin of the research was the upper basin of the Kumho water gage station which is located in the middle of the Kumho river. The 1:25,000 numerical geography which was constructed $10{\times}10m$ mesh was used. The range of investigation of topographical parameters are number of stream order, length, area, slope, basin relief, sinuosity ratio, drainage density and total stream length etc. It was found from the result of analysis that the threshold value of minimum order stream has a very big effect on topographical parameters of basin. It was found that the threshold area of minimum ord er stream revealed under $0.10km^{2}.$ Furthermore, the parameters showed a serious change except for over $0.10km^{2}.$

Keywords

References

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