角埔溪土石流流動模擬研究

Numerical Simulation of Debris Flow in Jiaopu Creek

林暘壹(Yang-I Lin) ； 詹錢登(Chyan-Deng Jan) ； 郭峰豪(Feng-Hao Kuo)

《中華防災學刊》 5卷1期 (2013/02) Pp. 51-61

摘要

角埔溪位在高雄市甲仙區小林村南側，曾於2008年卡玫基颱風及2009年莫拉克颱風期間發生土石流事件，土石流流入旗山溪，大量的土砂影響旗山溪的水流運動。本文使用FLO-2D數值模式，模擬角埔溪土石流流動，並分析流變參數大小對土石流流動的影響。此外，角埔溪上游有兩大支流，本文並模擬兩大支流同時發生土石流時的流動情形，以了解有匯流及無匯流之土石流流動差異。

關鍵字

角埔溪 ； 土石流 ； 流變參數 ； FLO-2D

並列摘要

Jiaopu creek is located on the south side of Hsiaolin village, Jiashian District of Kaohsiung City. When typhoon Kalmaegi in 2008 and typhoon Morakot in 2009 struck this area, large amount of sediment caused by the debris flow flew into Chishan River and then influenced the flow condition of Chishan River. This article applied FLO-2D numerical model to simulate the debris flow from Jiaopu creek during typhoon Morakot and analyze the effect of different rheological parameters on debris flow. Besides, there are two main tributaries in Jiaopu creek, this article also simulates the flow condition when the debris flow occurs at both tributaries in Jiaopu creek for understanding the differences of flow condition with confluence.

並列關鍵字

Jiaopu creek ； debris flow ； rheological parameters ； FLO-2D