利用區域化法推估台灣地區未設站地點年最大一日雨量之頻率
學年 97
學期 1
發表日期 2008-10-28
作品名稱 利用區域化法推估台灣地區未設站地點年最大一日雨量之頻率
作品名稱（其他語言） Frequency Analysis of Annual Maximum 1-Day Rainfall for Ungauged Sites in Taiwan Using Regionalization Approach
著者 蕭政宗; 黃亮芸
作品所屬單位 淡江大學水資源及環境工程學系
出版者
會議名稱 2008農業工程研討會
會議地點 臺北市, 臺灣
摘要 The purpose of the study aims to estimate frequencies of annual maximum 1-day rainfall for ungauged sites in Taiwan using regionalization approach. The index flood method with parameters estimated by L-moments is used to establish the regional frequency model of dimensionless annual maximum 1-day rainfall. Kriging is then employed to estimate the mean annual maximum 1-day rainfall of ungauged sites. Delineation of homogeneous regions is determined by cluster analysis in this study based on the coordinates of the rainfall gauge stations, the means and coefficient of variation of the annual maximum 1-day rainfall. The L-moment based discordancy, heterogeneity, and goodness-of-fit measures are then used to detect unusual sites and select the optimal regional probability models. In this study, a total of 77 rainfall gauge stations are used as the basis to estimate the frequencies of the annual maximum 1-day rainfall for ungauged sites. The number of homogeneous regions derived by the cluster analysis is 3. The best regional probability model for one region is the generalized Pareto distribution, and the Pearson type Ⅲ distribution is the best model for the other two regions. Frequency analysis for ungauged sites needs to establish the variogram models of the mean and coefficient of variation of the annual maximum 1-day rainfall first. The obtained variogram models are then used to estimate the mean annual maximum 1-day rainfall for the ungauged sites. The ungauged sites belong to which homogeneous regions depend on the minimum distance to the centroid of the homogeneous regions. Combined with the derived regional frequency model and estimated mean annual maximum 1-day rainfall, the computing procedures of frequency analysis for ungauged sites are identical with the procedures of gauged sites.
關鍵字 區域頻率分析;指數洪水法;線性動差;克利金;年最大一日雨量;Regional frequency analysis;Index flood method;L-moment;Kriging;Annual maximum 1-day rainfall
語言 zh_TW
收錄於
會議性質 國內
校內研討會地點
研討會時間 20081028~20081028
通訊作者
國別 TWN
公開徵稿 Y
出版型式 紙本
出處 2008農業工程研討會論文集，18頁
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/95746 )

機構典藏連結