水文數值模式模擬淹水潛勢-以中港溪流域為例

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题名:	水文數值模式模擬淹水潛勢-以中港溪流域為例
作者:	華道明;Hua, Tao-Ming
贡献者:	土木工程學系
关键词:	風險管理;WASH123D;水文頻率分析;淹水潛勢;Risk management;WASH123D;Rainfall frequency analysis;Flood potential
日期:	2018-08-06
上传时间:	2018-08-31 11:25:32 (UTC+8)
出版者:	國立中央大學
摘要:	台灣降雨季節分布不均，夏季常飽受颱風的侵襲，而且地勢高聳、河床坡度陡，只要短時間降雨量過大，就容易洪水氾濫平原，而近年極端氣候有增加的趨勢，洪水事件頻繁發生，如何減少淹水造成的損失是刻不容緩。我國目前大多使用工程的手段來減少損失，但效果有限且範圍不廣，如果能導入風險管理模式就可以增加解決問題的方法，也能用比較宏觀角度看待問題產生的風險。本研究利用水文數值模式WASH123D模擬台灣中港溪流域，進行定量降雨和重現期降雨的淹水模擬，結果顯示在竹南沿海、頭份平原和中港溪河岸附近所產生的淹水潛勢較其他區域來的大，透過水文數值模擬的結果，將其導入淹水風險評估模型，最終期望應用在台灣水工結構物設計規範、洪災保險制度等領域。 ;Rainfall of Taiwan is not well- distributed during the rainy season.The topography and river are commonly steep and time of concentration is short in Taiwan,where it is often hit hard by typhoon in summer.Because of very short hydrological respone time heavy rains result in flood inundation champaign easily. Extreme precipitation events have been upward trend and hydrological events are high frequency flooding in recent years.How to deal with flooding problems is very important. Our country traditionally uses engineering mitigations to reduce the loss and the effectiveness is limited.If we conduct risk management,the risk can be dealt with in a grander scheme. In this study,the Chungkang-River was selected as the target river basin.WASH123D was employed to simulate flooding from quantitative precipitation and return period precipitation.The severe flood is obviously near the bank of the Chungkang-River,champaign of the Toufen Township,and the coast of the Junan Township.Finally hope this research conducted flooding risk assessment model and applied in Design Specifications,flood insurance system.
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