A Study on Rainfall intensity-Duation-Frequency Analysis in Taiwan

• Main Authors: Wu, Shiang-Jen, 吳祥禎
• Other Authors: Liang-Cheng Chang
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/18433594853272823005

碩士 === 國立交通大學 === 土木工程學系 === 84 === The purpose of this study is to identify appropriate probability distributions for the annual maximum precipitation of various duration at ninety-two recording rain gauging stations in Taiwan .The method used in the frequency analysis is the L-moment method along with various goodness-of-fit procedures. Also, this study aims at developing a non- dimensional rainfall intensity-duration-frequency (IDF) equations based on a rainfall intensity with 25-year return period and 1-hour duration.To enhance the accuracy of the regional analysis, the cluster analysis was applied using the parameter in the IDF equation and geographical coordinates of each station. It is found the 92 raingage stations can be clustered separated by into two areas separated by the line connecting ({EMBED Equation |} E , {EMBED Equation |} N) and ({EMBED Equation |} E , {EMBED Equation |}N), as the demarcation.In the regional analysis, empirical relationships for each groupwere developed to relate each parameter in the IDF equation to the mean annual precipitation and elevation. The regional equations for the parameters in the IDF equation can be used to estimate extreme precipitation characteristics at locations where there is no precipitation record.