Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Sensitivity analysis of effective imperviousness estimation for small urban watersheds

도시 소유역 유효불투수율의 민감도 분석

  • 김대근 (목포대학교 공과대학 건설공학부 토목공학전공) ;
  • 고영찬 (당대학교 건설정보공학과)
  • Received : 2008.09.26
  • Accepted : 2009.02.25
  • Published : 2009.04.15
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Abstract

In this study, a runoff hydrograph and runoff volume were calculated by using the kinetic wave theory for small urban watersheds based on the concept of low impact development(LID), and the effective imperviousness was estimated based on these calculations. The degree of sensitivity of the effective imperviousness of small watersheds to the impervious to pervious area ratio, infiltration capability, watershed slope, roughness coefficient and surface storage depth was then analyzed. From this analysis, the following conclusions were obtained: The effective imperviousness and paved area reduction factor decreased as the infiltration capability of pervious area increased. As the slope of watersheds becomes sharper, the effective imperviousness and the paved area reduction factor display an increasing trend. As the roughness coefficient of impervious areas increases, the effective imperviousness and the paved area reduction factor tend to increase. As the storage depth increases, the effective imperviousness and the paved area reduction factor show an upward trend, but the increase is minimal. Under the conditions of this study, it was found that the effective imperviousness is most sensitive to watershed slope, followed by infiltration capability and roughness coefficient, which affect the sensitivity of the effective imperviousness at a similar level, and the storage depth was found to have little influence on the effective imperviousness.

Keywords

Acknowledgement

Supported by : 한국과학재단

References

  1. 건설교통부 (2000) 1999년도 수자원관리기법개발연구조사 보고서, 제1권 한국확률강우량도 작성
  2. 김대근, 박선중 (2008) 월류위험도 기반 침투형저류지 설계를 위한 평균무강우지속시간도 작성, 상하수도학회지, 22(2), pp. 195-203
  3. 이두진, 윤현식, 선상운, 곽수동, 이동훈 (2004) 강우유출 모델을 이용한 합류식 하수관거 월류수 저류시설의 용량결정에 관한 연구 (II) - 저류조 설계를 중심으로, 대한환경공학회지, 26(3), pp. 370-380
  4. Guo, J.C.Y. (2008), Volume-based imperviousness for storm water designs, J. of Irrigation and Drainage Engineering, 134(2), pp. 193-196 https://doi.org/10.1061/(ASCE)0733-9437(2008)134:2(193)
  5. Guo, J.C.Y. and Urbonas, B. (2002), Runoff capture delivery curves for storm-water quality control designs, J. of Water Resources Planning and Management, 128(3), pp. 208-215 https://doi.org/10.1061/(ASCE)0733-9496(2002)128:3(208)
  6. Huber, W.C. and Dickinson, R.E. (1992), Storm water management model, ver. 4: User's manual, Rep. No. EPA/600/3-88/001a, Environmental Research Lab. Office of Research and Development, USEPA, Athens, Georgia
  7. UDFCD (2001), Urban storm water drainage criteria manual, Vol. 3, UDFCD, Denver
  8. USEPA (1983), Results of the nationwide urban runoff program, NTIS Final Rep. No. PB84185545, Washington, D.C