수문모니터링과 물수지법을 이용한 농업용 저수지 유역 유출곡선번호 추정
Estimation of Runoff Curve Number for Agricultural Reservoir Watershed Using Hydrologic Monitoring and Water Balance Method
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Abstract
The rainfall-runoff potential of Jangseong reservoir watershed was studied based on SCS (Soil Conservation Service, which is now the NRCS, Natural Resources Conservation Service, USDA) runoff curve number (CN) technique. Precipitation and reservoir operation data had been collected. The rainfall-runoff pairs from the watershed for ten years was estimated using reservoir water balance analysis using reservoir operation records. The maximum retention, S, for each storm event from rainfall-runoff pair was estimated for selected storm events. The estimated S values were arranged in descending order, then its probability distribution was determined as log-normal distribution, and associated CNs were found about probability levels of Pr=0.1, 0.5, and 0.9, respectively. A subwatershed that has the similar portions of land use categories to the whole watershed of Jangseong reservoir was selected and hydrologic monitoring was conducted. CNs for subwatershed were determined using observed data. CNs determined from observed rainfall-runoff data and reservoir water balance analysis were compared to the suggested CNs by the method of SCS-NEH4. The CNⅡ measured and estimated from water balance analysis in this study were 78.0 and 78.1, respectively. However, the CNⅡ, which was determined based on hydrologic soil group, land use, was 67.2 indicating that actual runoff potential of Jangseong reservoir watershed is higher than that evaluated by SCS-NEH4 method. The results showed that watershed runoff potential for large scale agricultural reservoirs needs to be examined for efficient management of water resources and flood prevention.
참고문헌 (17)
- "Daily Stream Flow Modelling and Assessment based on Curve Number Technique", 16, pp.3131~3150 (2002)
- "C.T. and R.E.Schultz. 1987. Return period flow prediction with uncertain parameters Transaction of the ASAE 30", pp.665~669
- "Runoff Curve Numbers for the Southern High Plains Transaction of the ASAE 34", pp.142~148 (1991)
- "Curve Number as Random Variables In Proc. International Symposium on Rainfall-Runoff Modeling" (1982), Mississippi State Univ.
- "Estimating Runoff Curve Numbers for Paddy Fields", 30(4), pp.379~387 (1997)
- "Safety Appraisal of the Jangsung Reservoir" (2000)
- "Master Thesis" (1989), Seoul National University
- "Estimating Curve Number of SCS Method for Calculated Runoff", pp.227~231 (1999)
- "New Concept of Curve Number Applicable to the Korean Watersheds, Proceedings of the 1995 Annual Conference", pp.295~300 (1995)
- "Estimation of Curve Number by DAWAST Model Journal of the Korea Water Resources Association", 30(5), pp.423~430 (1997)
- "Runoff Curve Number: Has it reached Maturity?", 1(1), pp.11~19 (1996)
- "Journal Irrigation and Drainage Engineering", 117(5), pp.656~666
- "U. S. Department of Agriculture" (1972)
- "Determination of Effective Rainfall by US SCS Method and Regression Analysis. Journal of Korea Water Resources Association", pp.101~111 (1977)
- "Runoff Curve Numbers Determined by Three Methods under Conventional and Conservation Tillages Transaction of the ASAE", pp.57~63 (1993)
- "Journal of the Korea Water Resources Association", 24(2), pp.97~108, in Korean
- "Estimation of Runoff Depth and Peak Discharge by SCS Curve Numbers and Time Variation of curve Numbers. Journal of the Korea Water Resources Association", pp.87~95 (1992)