國立屏東技術學院院區降雨強度公式之推求與其逕流量之估算

THE DEDUCTION OF THE FORMULA OF NATIONAL PINGTUNG POLYTECHNIC INSTITUTE RAINFALL INTENSITY AS WELL AS THE ESTIMATION OF RUNOFF

李錦育(Ching-Yuh Lee)

《中華水土保持學報》 23卷1期 (1992/05) Pp. 73-80

https://doi.org/10.29417/JCSWC.199205_23(1).0006

摘要

本研究採用四種頻率分析方法及三種降雨強度公式，分別就機率雨量分布情形與決定最適型降雨強度式詳加探討；得如下結果：1.由迴歸分析中之判定係數值及其估計誤差知悉：甘保一周文德法及皮爾遜第三型分布為最佳之頻率分析方法；對數常態及對數皮爾遜第三型分佈法次之；岩井法再次之。2.最適型降雨強度公式依序為：Sherman，Iwai及Talbot。3.以合理化公式推求尖峰逕流量時，宜就集水區特性（面積、覆蓋度等）先詳加調査與分析，以免造成工程結構物過大或不足之弊。

關鍵字

頻率分析 ； 機率雨量 ； 降雨強度

並列摘要

Four frequency analysis methods & three rainfall-intensity formulas were used in this study. The best probable rainfall distribution and optimal rainfall-intensity formula in the National Pingtung Polytechnic Institute were discussed. The results are summarize as follows: 1. According to the results of coefficient of determination and estimation of standard error by regression analysis, the Gumbel-Chow & Pearson type III distribution methods were found to be the best for frequency analysis. The Log-Normal and Log-Pearson type III distribution methods were the second. And the lwai method was the third. 2. The optimal rainfall-intensity formulas could be .arranged in a descending order as Sherman. Iwai, and Talbot. 3. When calculating the peak runoff by rational formulas, survey and analysis of the watershed characteristics, such as area and covers must be carried out beforehand, so as to prevent miscalculation and design errors in engineering constructions.

並列關鍵字

Frequency analysis ； Probable rainfall ； Rainfall-intensity