河川流域长期雨量及流量对水资源变化之影响the-水土保持学系.pdfVIP

河川流域長期雨量及流量對水資源變化之影響 林文英 (1) 林俐玲(2) 摘 要 台灣地區各種用水主要取自河川及水庫，而水源多仰賴降雨量之補注，本研究主要藉由長 期雨量及流量資料收集，探討基隆河流域及濁水溪流域的水資源變化情形。根據歷年平均雨量 記錄，基隆河流域長期雨量變化顯然有遞減的趨勢，但是流量記錄顯示卻呈現遞增現象；濁水 溪流域長期雨量變化雖然有遞增的趨勢，但流量記錄顯示卻呈現上游段流量變化不明顯、中游 段流量有遞增趨勢、下游段則呈現遞減現象；綜合本研究分析結果顯示，全省雨量變化是呈現 遞減趨勢，而此趨勢表示河川流域長期雨量及流量變化已暗示水資源減少。 關鍵詞( ：河川流域，雨量，流量，水資源) The Study of River Basin Long-Term Rainfall and Discharge Effect on Water Resource Variation (1) (2) W.Y. Lin , L.L. Lin Candidate(1) and Professor(2), Department of Soil and Water Conservation, National Chung Hsing University, Taichung 402, Taiwan, R.O.C. Abstract The water used mainly takes from the river and the reservoir in Taiwan, and the water source was depended on the rainfall supply. The long term rainfall and runoff records were collected to investigate the variation of water resource in Keelung River and Jhuoshuei River. According to historical record, the long-term rainfall decreased obviously, but the runoff increased in Keelung River. The Jhuoshuei River has opposite phenomenon. However, the totally results showed that the rainfall has the tendency of decrease in the whole island, and the weather change influenced the rainfall distribution and amount, which may imply the crisis of water resource shortage. (Key words ：river basin ，rainfall ，runoff ，water resource) (1)國立中興大學水土保持學系博士候選人 (2)國立中興大學水土保持學系博士教授 169 水土保持學報 41(2) ：169-180 (2009) Journal of Soil and Water Conservation, 41(2) ：169-180 (2009) 分循環是降雨的重要來源。 一、前言 另外降