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http://dx.doi.org/10.3741/JKWRA.2012.45.7.713

Bivariate Rainfall Frequency Analysis and Rainfall-runoff Analysis for Independent Rainfall Events  

Park, Cheol-Soon (School of Civil, Environmental and Architectural Engineering, College of Engineering, Korea University)
Yoo, Chul-Sang (School of Civil, Environmental and Architectural Engineering, College of Engineering, Korea University)
Jun, Chang-Hyun (School of Civil, Environmental and Architectural Engineering, College of Engineering, Korea University)
Publication Information
Journal of Korea Water Resources Association / v.45, no.7, 2012 , pp. 713-727 More about this Journal
Abstract
In this study, the bivariate frequency analysis of the independent annual rainfall event series was done to be used for the runoff analysis, whose results were also compared with those from the conventional univariate frequency analysis. This study was applied to three differently-sized basins such as the Joongryang Stream, Chunggye Stream, and Ooyi Stream. The Clark model was used as the runoff model, and the SCS method was applied for the calculation of the effective rainfall. The alternating block method and the Huff method were considered to be compared for the temporal distribution of rainfall event. Summarizing the results are as follows. (1) The difference between the univariate and bivariate frequency analysis results were large when the rainfall duration was short, but significantly decreased as the rainfall duration increased. The univariate frequency analysis results were bigger when the rainfall duration was short, but smaller in opposite case. (2) The peak flow derived by applying the alternating block method was bigger than that by the Huff method. Also, the peak flow when applying the alternating block method increased as the rainfall duration increased, but converged smoothly around the rainfall duration of 24 hours. (3) For the Joongryang Stream, when applying the Huff method, the peak flow derived for the bivariate frequency analysis was bigger than that for the univariate case, but for the other two basins, the results were opposite. When applying the alternating block method, the results were consistent for all three basins that the peak flow derived by applying the bivariate frequency analysis was bigger than those by the univariate frequency analysis.
Keywords
independent rainfall events; bivariate frequency analysis; runoff analysis; flood discharge;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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