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題 名 | A Study of Mean Areal Precipitation and Spatial Structure of Rainfall Distribution in the Tsen-wen River Basin=曾文溪流域降雨分佈之平均雨量及空間研究結構 |
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作 者 | 溫志超; | 書刊名 | 中國工程學刊 |
卷 期 | 24:5 2001.09[民90.09] |
頁 次 | 頁649-658 |
分類號 | 328.63 |
關鍵詞 | 徐昇法; 克利金法; 序率統計; 半變異元; Thiessen method; Kriging method; Stochastic approach; Semivariogram; |
語 文 | 英文(English) |
中文摘要 | 本研究以序率統計中克利金法進行降雨空間結構研究。其中以半變異元原理檢定 於曾文溪流域發生的六場颱風降雨之空間結構及其平均降雨量。 研究發現曾文溪流域的地貌變化會對流域內降雨分佈造成影響。此一影響可以由克利金法計 算所得之平均降雨量分佈不同於傳統徐昇法計算所得之平均降雨量, 此一差量約為 2.5 % 的差量。 而另一證據為克利金法所求得之六場颱風降雨分佈的平均範圍( range )約為 46.17 公里,此一結果與曾文溪河川流入平原地區後的總長度 47 公里非常接近。此外,本 研究亦發現,當降雨分佈的標準偏差愈小時,本研究所假設之二階定常檢定降雨空間結構假 設越合適。 |
英文摘要 | In this paper, the kriging method with stochastics was applied in order to study the spatial structure of precipitation distributions. Mean areal precipitation and the spatial structure of six storms over the Tsen-Wen River basin were examined by semivariograms of the storms. Findings revealed topographic influences on the rainfall distributions in the study area. These impacts were reflected in the difference between the mean areal precipitation of the kriging and the Thiessen methods and the correlation structure (or range) of the rainfall distributions. The mean areal precipitation showed a difference of 2.5% in favor of the kriging method. The range of the rainfall distribution averaged about 46.17-km, a very close correlation to the down-stream length, 47-km, of the Tsen-Wen River. In addition, the smaller the standard deviations of the precipitation distributions, the more appropriate it is to use the assumption of the second-order stationarity for investigating the storm structures. |
本系統中英文摘要資訊取自各篇刊載內容。