Current Research on Agriculture and Life Sciences
- 제7권
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- Pages.55-66
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- 1989
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- 2287-271X(pISSN)
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- 2288-0356(eISSN)
유역(流域)의 지상인자(地上因子)를 이용(利用)한 홍수량(洪水量) 해석(解析)
Analysis of the Direct Runoff by Using the Geomorpologic Parameters of Watersheds
- Suh, Seung Duk (Dept. of Agricultural Engineering, Coll. of Agric., Kyungpook Natl. Univ.) ;
- Lee, Seung Yook (Dept. of Agricultural Engineering, Coll. of Agric., Kyungpook Natl. Univ.)
- 발행 : 1989.12.30
초록
낙동강수계중(洛東江水系中)의 3개(個) 중대(中大) 유역(流域)인 안동댐 유역(流域)(
The purpose of this study is to estimate the flood discharge and peak time by the SCS method and the probability method using the geomorpologic parameters obtained from the topographic maps following the law of stream classifying and, ordering by Horton and Strahler. The SCS method and the probability method are used in estimating the times to peak and the flood discharges at An-dong, Im-ha, and Sun-san basins in the Nakdong River system. The results obtained are as follows : 1. The range of the values of the area ratio, the bifurcation ratio and the length ratio agree with those of natural streams presented by Horton and Strahler. 2. Comparisons of the probability method and observed values show that small relative errors of 0-7% of flood discharge, and 0-2hr, difference in time to peak respectivly. But the SCS method shows that large relative errors of 10-40% of flood discharge, and 0-4hr, difference in time to peak. 3. When the rainfall intensity is large, the error of flood discharge estimated by using the probability method is relativly small.
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