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http://dx.doi.org/10.3741/JKWRA.2007.40.11.851

Evaluation for usefulness of Chukwookee Data in Rainfall Frequency Analysis  

Kim, Kee-Wook (Dept. of Architectural, Civil & Environmental Eng., Korea Univ.)
Yoo, Chul-Sang (Dept. of Architectural, Civil & Environmental Eng., Korea Univ.)
Park, Min-Kyu (Dept. of Architectural, Civil & Environmental Eng., Korea Univ.)
Kim, Hyeon-Jun (Korea Institute of Construction Technology)
Publication Information
Journal of Korea Water Resources Association / v.40, no.11, 2007 , pp. 851-859 More about this Journal
Abstract
In this study, the chukwookee data were evaluated by applying that for the historical rainfall frequency analysis. To derive a two parameter log-normal distribution by using historical data and modem data, censored data MLE and binomial censored data MLE were applied. As a result, we found that both average and standard deviation were all estimated smaller with chukwookee data then those with only modern data. This indicates that rather big events rarely happens during the period of chukwookee data then during the modern period. The frequency analysis results using the parameters estimated were also similar to those expected. The point to be noticed is that the rainfall quantiles estimated by both methods were similar. This result indicates that the historical document records like the annals of Chosun dynasty could be valuable and effective for the frequency analysis. This also means the extension of data available for frequency analysis.
Keywords
historical frequency analysis; censored data MLE; binomial censored data MLE;
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