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題名:南投縣神木集水區崩塌特性分析     (26點)
Characteristics of the Landslides in Shenmu Watershed in Nantou County
著者:陳樹群(Su-Chin Chen) ;陳少謙(Shao-Chien Chen) ;吳俊鋐(Chun-Hung Wu)
出版地區:台灣
出版城市:台北市
學科:地球科學
關鍵字:神木集水區 ; 長延時高強度降雨 ; 大崩塌 ; Shenmu watershed ; long-duration high-intensity rainfall ; large landslide
刊名:中華水土保持學報
卷期:43卷3期(2012.9)
頁碼:214-226
語言:繁體中文
摘要: 中文摘要PDF ; 英文摘要PDF

崩塌是神木集水區引發多次土石流主因,本區岩性以砂岩與頁岩為主,地質結構脆弱;集集地震、中長延時(降雨時數超過12小時)或高強度(平均降雨強度超過30mm/hr)降雨是集水區引發嚴重崩塌主因;2009年莫拉克颱風之強降雨導致下邊坡嚴重崩塌,48小時累積雨量1,628.0 mm造成下邊坡崩塌為上邊坡崩塌之8倍,也引發7個崩塌面積超過10ha之大崩塌,包括2處舊崩塌及5處新崩塌。颱風事件仍為神木集水區之崩塌主因,且近年崩塌比仍有增加之趨勢。
Landslides are the main reason for the serious debris flow disaster events in Shenmu watershed. The geology of Shenmu is sandstone and shale, making it fragile. The Chichi earthquake in 1999 and the following long-duration rainfall with a duration over 12 hrs or high intensity rainfall with a mean rainfall intensity over 30 mm/hr were the main reasons for the serious landslide events in Shenmu watershed. The rainfall-induced landslides are mainly located in the down-hillslope due to scouring by flooding. The total area of the down-hillslope landslide is eight times larger than that of the up-hillslope landslide in the landslide event following Typhoon Morakot in 2009 with accumulated rainfall of 1628 mm in 48hrs. Further, 7 large landslide cases with a landslide area >10ha, including 2 old landslide cases and 5 new landslide cases, in Shenmu watershed were also induced after Typhoon Morakot in 2009. Typhoon events with long-duration rainfall or high intensity rainfall are the main reasons for the landslide events in Shenmu watershed, and the landslide ratio has an increasing trend based on the analysis of the heavy-rainfall events in recent years.


    

本卷期目次
中華水土保持學報 43卷3期 (2012.9)
頁岩風化不飽和土壤之土壤水分特性曲線/ 范嘉程黃俊龍
高屏溪上游地區地形地質對河床土砂之影響分析/ 壽克堅費立沅陳勉銘魏正岳洪嘉妤黃怡婷
南投縣神木集水區崩塌特性分析/ 陳樹群陳少謙吳俊鋐
濁口溪流域的地表作用與曲流地形間之相對應關係/ 許家銘陳宏宇
大安溪河床揚塵對鄰近地區之影響評估/ 林德貴王勝賢劉文宗黃隆明
植生地表上均勻降雨之水理分析/ 胡秀怡謝平城
同心圓柱間賓漢流體穩態流況之研究/ 劉格非吳映昕
神木集水區土壤沖蝕特性/ 何幸娟林伯勳冀樹勇尹孝元施美琴羅文俊
 
   
 
   

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