頁籤選單縮合
| 題 名 | 臺灣地區年一日、二日、三日最大暴雨及年最大日流量之頻率分析研究 |
|---|---|
| 作 者 | 虞國興; 劉振忠; | 書刊名 | 農業工程學報 |
| 卷 期 | 37:3 1991.09[民80.09] |
| 頁 次 | 頁27-37 |
| 分類號 | 443.046 |
| 關鍵詞 | 流量; 臺灣; 暴雨; 頻率; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 本研究主要目的為探討適合臺灣水文資料(年一日、二日、三日最大暴雨及年最大日流量)之機率分布,藉以訂定頻率分析標準,作為有關單位決策實施之參考。研究中以合成資料探討:(1)何種點繪法較佳;(2)何種判斷準則較準確;(3)頻率分析中各機率分布推估參數時資料是否須轉換及(4)偏態係數之推估值應採用何種校正方式。此研究之結果並作為分析實測資料時之依據。結果顯示對數皮爾遜Ⅲ型分布分布最合適於臺灣年一日、二日、三日最大暴雨及年最大日流量資料,同時,推估參數時資料無須經對數轉換,偏態係數之推估值需以Bobee-Robitaille修正公式予以校正及點繪法宜採用海生(Hazen)法為佳。然而,當資料偏態係數與變異係數滿足Cs>Cv³+3Cv時,應與次優分布做一比較,選取一較合適者。當分析年一日、二日及三日最大暴雨資料時,其次優之分布為三參數對數常態分布,當分析年最大日流量資料時,其次優之分布為皮爾遜Ⅲ型分布。 |
| 英文摘要 | The major objective of this research reported herein was to investigate the most appropriate probability distributions for the annual 1-day, 2-day and 3-day maximum rainfall and annual maximum streamflow in Taiwan. Thus, the guidelines for hydrologic frequency analysis could be set up and be used as a reference for the decision maker. In the present study, the following topics were investigated by using the synthetic data:(1) Which plotting position formula is suitable (2) Which criterion is appropriate (3) Does the data need transforming when the parameters are estimated and (4) How to modify the estimated skewness coefficient Then, the results obtained from the synthetic data studies were used for the analysis of real data. The results indicated that Log Pearson Type Ⅲ distribution was the most appropriate for the annual 1-day, 2-day and 3-day maximum rainfall and annual maximum streamflow in Taiwan. Mean while, there is no need to make log transformation when the parameters are estimated, and Bobee-Robitaille formula should be used to modify the estimated skewness coefficient; and Hazen plotting position formula should be used. However, an alterative probability distribution should be used to compare when the value of the estimated skewness coefficient (Cs) and coefficient of variation (Cv) satisfies Cs>Cv³+3Cv. The 3-parameter Log Normal distribution was suggested to be used as the alternative for the annual 1-day, 2-day and 3-day maximum rainfall, while Pearson Type Ⅲ distribution for the annual maximum streamflow. |
本系統中英文摘要資訊取自各篇刊載內容。