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水保技術研討會
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中文摘要
近年來平均降雨強度持續向上攀升，坡地災害也隨之而來，而處於多山地形的台灣，山坡
地野溪河道在土石流或高含砂水流的衝擊下，常造成大量土石淤積，若無適當土石清淤，當再
次遭遇颱風暴雨時，很容易造成下游人民身家財產之損失，而本文以水文分析模式為土石流及
輸砂模擬之基礎，於先期進行水文分析，採用目前普遍應用於河道集水區之水文分析模組
HEC-HMS 進行集水區水文演算，得到清水流之流量歷線線，之後則以土石流模擬之FLO-2D 數
值模式進行集水區內土石流及輸砂模擬，期能提供後續之土石清淤，清疏量體之依據，並用以
評估整治工程之效益。
英文摘要
Recently, an statistics result show the average rainfall clumb. Massive sediment deposit usually happens when debris flow or high sand flow occurs in hillslope. If there is not any treatment such as sediment dredging, the loss in life and property usually arise during the period of typhoon. Therefore, a suitable assessment method, which can be used to select the most possible place of disaster in thefuture,is necessary for the follow-up sediment dredging. This study use FLO-2D and HECHMS establishes the assessment method of sediment dredging for Hillslope using the example of Yilan county.