Rainfall Intensity - Duration - Frequency Analysis in Taiwan

• Main Authors: Hung,Ging-Fu, 洪菁甫
• Other Authors: Hsu,Ming-hsi
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/99382868401122179053

碩士 === 國立臺灣大學 === 農業工程學系 === 82 === The data files of rainfall including the weather stations of CentralWeather Bureau, Taiwan Provincial Water Conservancy Bureau, and Taiwan Electric Power Company were collected and analysed in order todevelop the relations among rainfall intensity , duration and frequency for Taiwan area. The annual maximum serious is used for selection of rainfall in frequency analysis. The criteria for selection of weather stations is those have record length longer than ten years. In this research, 167 stations were chosen, which include 21 stations from Central Weather Bureau, 96 stations from Taiwan Provincial Water Conservancy Bureau, and 50 stations from Taiwan Eletric Power Company. Frequency analysis was done for a total of 167 stations based on Pearson Type of III distribution . The results from frequency analysis is used as the source data for developing rainfall intensity , duration and frequency relations. Then, multiple regression is applied to estimate the coefficients of Rainfall Intensity - Duraion - Frequency formula. The regression is based on the source data from frequency analysis corresponding return period and duration. In order to improve the accuracy of Rainfall Intensity - Duration - Frequency formula, The rainfall duration was divided into long duration and short duration. The long duration is five to seventy - two hours, and the short duration is ten minutes to five hours. The established regional Rainall Intensity - Duration - Frequency relationship for Taiwan has been preliminarily verified and shown applicable in planning and design of hydraulic works.