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頁籤選單縮合
題名 | 臺灣地區降水量時季分佈不均性的變化=The Change of the Unevenness of Seasonal Distribution of Precipitation in Taiwan |
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作者 | 張伯宇; Chang, Po-yu; |
期刊 | 中國地理學會會刊 |
出版日期 | 20000700 |
卷期 | 28 2000.07[民89.07] |
頁次 | 頁145-161 |
分類號 | 328.63 |
語文 | chi |
關鍵詞 | 降水量; 時季分佈不均性; 變化; Precipitation; Unevenness of seasonal distribution; Change; |
中文摘要 | 降水的時間分佈不均性是探討水文環境特徵的重要環節,本文利用熵值計算所得的有序度指數,量化臺灣地區降水量在時季上分佈的不均程度,並針對直線演變趨勢、波動趨勢、變動幅度三個面向進行統計的檢定分析。分析結果指出,雖受到北部冬季多雨的影響,臺灣地區降水量的時季分佈不均程度有由東北向西南遞增的現象,全區時季分佈不均程度的差距約達30%,但整體而言此不均性並未隨時間產生顯著的增減趨勢;有序度指數相對於趨勢線呈上、下振盪,其波動趨勢具有3.70年至5.78年的平均變化週期,空間上無顯著差異,而有序度指數相對於趨勢線的平均變動幅度介於1.89%至8.95%,呈現出由東北向西南遞增的空間差異,然變動幅度也並未隨時間產生顯著的增減趨勢。 |
英文摘要 | The unevenness of temporal distribution is an important component of the characteristics of hydrological environment. In this paper the index of order derived from entropy statistics is used to measure the unevenness of seasonal distribution of precipitation, and the changes in secular trend, f1uctuation period and amplitude of f1uctuationare analyzed by statistical methods. The result of analysis shows that average seasonal unevenness in precipitation of Taiwan increases from northeast to southwest because the monsoon causes the higher precipitation relatively in northern region in winter and the spatial difference is about 30%, but it does not exhibit any significant change through time. The average f1uctuation period is from 3.70~5.78 years and its spatial difference is not significant. The average amplitude is from 1.89%~8.95% and increases from northeast to southwest, but does not exhibit any significant trend through time too. |
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