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Gamma Family군의 분포형에 의한 강우의 빈도분석
류경식 ( Ryoo Kyoung-sik ),이순혁 ( Lee Soon-hyunk ),맹승진 ( Maeng Sung-jin ),송기헌 ( Song Ki-hurn ),김기창 ( Kim Gi-chang ) 한국농공학회 2003 한국농공학회 학술대회초록집 Vol.2003 No.-
This study was conducted to choose optimal distribution and to estimate properly parameters for the derivation of design rainfall in Gamma Family. Design rainfall derived by Gamma Family Distributions were compared by the Relative Mean Errors (RME) and Relative Absolute Errors(RAE) for the consecutive durations of 1, 3, 6, 12, 24, 36, 48 and 72hr and 65 regions all over the regions except Cheju and Wulreung islands in Korea. Consequently, Design rainfall derived by Indirect Method of Moments in the Log-Pearson Type 3 distribution are seemed to be more reasonable than those of other distributions in Gamma Family.
Log-Pearson Type III 및 GEV분포모형에 의한 강우의 지점 및 지역빈도 비교분석
류경식 ( Ryoo Kyong Sik ),이순혁 ( Lee Soon Hyunk ) 한국농공학회 2003 한국농공학회 학술대회초록집 Vol.2003 No.-
This study was conducted to draw design rainfall for the regional design rainfall derived by the optimal distribution and method of frequency analysis. The design rainfalls were calculated by the regional and at-site analysis for Log-Pearson type III and GEV distributions and were compared with Relative efficiency(RE) which is ratio of Relative root-mean-square error (RRMSE) by the regional and at-site analysis for Log-Pearson type III and GEV distributions. Consequently, optimal design rainfalls following the regions and consecutive durations were derived by the regional frequency analysis for GEV distribution and design rainfall maps were drawn by GIS techniques.