Gamma 및 비Gamma군 분포모형에 의한 강우의 지점 및 지역빈도 비교분석 (I) = Comparative Analysis of Regional and At-site Analysis for the Design Rainfall by Gamma and Non-Gamma Family (I)

다국어 초록 (Multilingual Abstract)

This study was conducted to derive the design rainfall by the consecutive duration using the at-site frequency analysis. Using the errors, K-S tests and LH-moment ratios, Log Pearson type 3 (LP3) and Generalized Extreme Value (GEV) distributions of Gamma and Non-Gamma Family, respectively were identified as the optimal probability distributions among applied distributions. Parameters of GEV and LP3 distributions were estimated by the method of L and LH-moments and the Indirect method of moments respectively. Design rainfalls following the consecutive duration were derived by at-site frequency analysis using the observed and simulated data resulted from Monte Carlo techniques. Relative root-mean-square error (RRMSE) and relative efficiency (RE) in RRMSE for the design rainfall derived by at-site analysis in the observed and simulated data were computed and compared. It has shown that at-site frequency analysis by GEV distribution using L-moments is confirmed as more reliable than that of GEV and LP3 distributions using LH-moments and Indirect method of moments in view of relative efficiency.

참고문헌 (Reference)

1 "Using Higher Probability Weighted Moments for Flood Frequency Analysis" 194 : 95-106, 1997b

2 "LH Moments for Statistical Analysis of Extreme Events" 33 (33): 2841-2848, 1997

3 "Flood Estimation Handbook" 1999

4 "Comparative Studies on the Design Floods Derived by Different Methods for the Parameters of the Log Pearson Type Ⅲ Distribution" 4 (4): 34-50, 1997

5 "Analysis and Estimation of Distributions using Linear Combinations of Order Statistics. J. R. Stat. Soc." 1990.l-moments

6 "1991. The Gamma Family and Derived Distributions applied in Hydrology. Water Resources Publications."