臺灣博碩士論文加值系統

　 臺灣地區降雨在時間及空間分佈皆十分不平均，本研究以碎形幾何學的觀點分析此現象，以探求降雨在時間及空間分佈之不規則性與碎形維度之關係。
本研究採用盒算法推求台灣地區降雨量時間序列之碎形維度值，所分析的雨量時間序列包括時雨量資料及日雨量資料。
由本研究結果得知，北部地區乾、濕季碎形維度的差值為0.016 ，且降雨不規則度差異較小；南部地區乾、濕季碎形維度的差值為0.17，且降雨不規則度差異較大。此結果顯示在乾、濕季降雨不規則度差異較大之地區，其碎維值差異亦大，此結果在南部地區尤為顯著。而碎維值與高程也有密切的關係，二者間有明顯的冪次相關。此外經由碎維值在空間上分佈的趨勢可發現，其與年降雨量之主成份分析與群集分析之結果有明顯的相關趨勢。
由本研究討論之結果，可提供本省各地區降雨特性之參考，未來在雨量站網規劃、設計及雨量資料補遺之依據。此外，在水資源調配與評估及水利工程設計及農業區水資源供需區分等，亦可供作參考。
式，展示其開發潛力。至於更精確之模擬結果及展示成果尚待進一步之研究與開發。

The study investigates the irregularity of rainfall both in
time and in space in light of their fractal dimensions. Box-counting method was employed to calculate the fractal dimension of hourly and daily rainfall time series for rainfall station of no-rthern, central and southern Taiwan area.
The result show that difference of average fractal dimension of dry seasonand wet season is 0.016 and 0.17 for northern and southern Taiwan, respectively, indicating the irregularity of rainfall occurrence in dry and wet season is significantly different for southern Taiwan, however, not as significantly different for the north. Fractal dimension of rainfall occurrence calculated for each statison is found to be closely related to station elevation, thus, exemplies the influence of orographic factor on rainfall characteristics which calls for the consideration of orographic influence in raingage network design.