Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Improving Low Flow Estimation for Ungauged Basins in Korea

국내 미계측유역의 갈수량 산정 개선

  • Cho, Tak-Guen (School of Civil, Urban & Geosystem Engrg., Seoul National Univ.) ;
  • Lee, Kil-Seong (School of Civil, Urban & Geosystem Engrg., Seoul National Univ.) ;
  • Kim, Young-Oh (School of Civil, Urban & Geosystem Engrg., Seoul National Univ.)
  • 조탁근 (서울대학교 공과대학 지구환경시스템공학부) ;
  • 이길성 (서울대학교 공과대학 지구환경시스템공학부) ;
  • 김영오 (서울대학교 공과대학 지구환경시스템공학부)
  • Published : 2007.02.28
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Abstract

Low flow is a minimum flow discharging during a dry season in a unregulated stream which can be shared by nature and human being. It is also a standard flow that determines a diversion requirement by evaluating water supply ability of streamflow in the aspect of water use. Low flow indices are used as average low flow and 1-day 10-year low flow in Korea and Japan and as 7-day 10-year low flow in the United States of America and the United Kingdom. In this research, these three indices were compared by the data observed and generated. Although daily records are needed to calculate the low flow, gauging stations are limited and records of the dry season are insufficient in Korea. Drainage-area ratio method is mainly used in Korea to estimate the low flow. This research shows the guideline when the drainage-area ratio method, the regional regression method, and the baseflow correlation method to calculate the low flow of ungauged basins are applied and recommends low flow estimation method suitable to Korea.

갈수량(low flow)은 과거 자연상태 하천에서 갈수기에 흘렀던 유량으로서 자연과 사람이 공유할 수 있는 최소한의 유량이며, 이수측면에서 하천수의 공급능력을 평가하여 취수량을 설정하는 기준 유량이다. 일본과 우리나라에서는 평균갈수량과 기준갈수량을, 미국과 영국 등에서는 10년빈도 7일 갈수량($7Q_{10}$)을 갈수량 지표로 사용하고 있다. 본 연구에서는 위의 세 지표를 관측자료와 모의 생성자료를 이용하여 비교하고 고찰하여 보았다. 갈수량 산정을 위해서는 과거의 관측 유량자료가 필요하나 국내에는 수위관측시설이 한정되어 있을 뿐 아니라 홍수기에 비해 갈수기 자료가 턱없이 부족하여 갈수량 산정에 많은 어려움을 겪고 있다. 국내에서는 대부분 비유량법(drainage-area ratio method)으로 미계측유역의 갈수량을 산정하고 있다 본 연구에서는 미계측유역(ungauged basin)의 갈수량을 산정하기 위한 방법으로 비유량법과 지역회귀기법(regional regression method), 기저유량상관법(baseflow correlation method)을 국내에 적용하여 보고, 각 방법의 적용시 지침과 국내에 적합한 갈수량 산정방법을 제시하였다.

Keywords

References

  1. 건설교통부 (1997). 감천 하천정비기본계획(보완)보고서. 보고서, 건설교통부
  2. 건설교통부 (2002a). 금강수계 하천정비기본계획보고서. 보고서, 건설교통부
  3. 건설교통부 (2002b). 안양천 하천정비기본계획(보완) 보고서. 보고서, 건설교통부
  4. 김경덕, 김돈수, 허준행, 김규호 (2003). '한강유역의 확률갈수량 추정기볍 비교연구' 한국수자원학회 논문집, 제36권, 제2호, 한국수자원학회, pp. 315-324
  5. 서울특별시 (2002). 성내천. 감이천 하천정비기본계획보고서. 보고서, 서울특별시
  6. 안상진, 윤용남, 강관원 (1981). '금강수계의 하천형태학적 특성인자에 의한 갈수량 산정.' 한국수자원학회지, 제14권, 제1호, 한국수자원학회, pp. 31-37
  7. 이명섭 (1993). 유역특성을 이용한 갈수량 산정에 관한 연구, 석사학위논문, 한양대학교
  8. 이재형, 조기태 (1999). '미계측 산지하천 유역의 설계 갈수량 추정식 개발' 대한토목학회논문집, 제19권, 제 II-2호, 대한토목학회, pp. 169-181
  9. 한국수자원공사 (1995). 하천유지유량 결정방법의 개발 및 적용 보고서
  10. Arihood, L.D., and Glatfelter, D.R (1991). 'Method for estimating low-flow characteristics of ungaged streams in Indiana.' U.S. Geological Survey Water-Supply Paper 2372, U.S. Geological Survey
  11. Fennessey, N., and Vogel, R.M. (1990). 'Regional flow-duration curves for ungauged sites in Massachusetts.' Journal of Water Resources Planning and Management, Vol. 116, No.4, pp. 530-549 https://doi.org/10.1061/(ASCE)0733-9496(1990)116:4(530)
  12. Flynn, R.H. (2003). 'Development of regression equation to estimate flow durations and low-flaw-frequency statistics in New Hampshire streams.' Water-Resources Investigations Report, U.S. Geological Survey, Pembroke, New Hampshire
  13. Parker, G.W. (1977). 'Methods for determining selected flow characteristics for streams in Maine.' US. Geological Survey Open File Report, U.S. Geological Survey
  14. Reilly, C.F., and Kroll, C.N. (2003). 'Estimation of 7-day, 10-year low-streamflow statistics using baseflow correlation.' Water Resources Research, Vol. 39, No.9, pp. 1236-1246 https://doi.org/10.1029/2002WR001740
  15. Ries, K.G., and Friesz, P.J, (2000). 'Methods for estimating low-flow statistics for Massachusetts streams.' Water-Resources Investigations Report, U.S. Geological Survey, Northborough, Massachusetts
  16. Smakhtin, V.U. (2001). 'Low flow hydrology: A review.' Journal of Hydrology, Vol. 240, pp. 147-186 https://doi.org/10.1016/S0022-1694(00)00340-1
  17. Stedinger, J.R., and Thomas Jr., W.O. (1985). 'Low-flow frequency estimation using base-flow measurements.' Us. Geological Survey Open File Report, 85-95
  18. Stedinger, J.R., Vogel, R.M, and Foufoula-Georgiou, E. (1992). 'Chapter. 18 Frequency analysis of extreme events.' Handbook of Hydrology, edited by D.R. Maidment, McGraw-Hill
  19. Thomas, D.M, and Benson, M.A. (1970) 'Generalization of streamflow characteristics from drainage-basin characteristics.' U.S. Geological Survey Water Supply Paper
  20. Vogel, R.M., and Kroll, C.N. (1990). 'Generalized low-flow frequency relationships for ungaged sites in Massachusetts.' Water Resources Bulletin, Vol. 26, No.2, pp. 241-253
  21. Vogel, R.M, and Kroll, C.N. (1992). 'Regional geohydrologic-geomorphic relationships for the estimation of low-flow statistics.' Water Resources Research, Vol. 28, No.9, pp. 2451-2458 https://doi.org/10.1029/92WR01007
  22. Wilson, J.T. (2000). 'Evaluation of a method of estimating low-flow frequencies from base-flow measurements at Indiana streams.' Waterresources Investigations Report, U.S. Geological Survey, Indianapolis, Indiana

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