CAJ | 학술논문

自20世纪50年代以来，九寨沟县干沟曾暴发过几次小规模的泥石流，对泥石流堆积区居民的生命财产造成了威胁。“5.12”汶川地震之后，干沟泥石流流域内岩、土体的原始应力状态发生改变，地质结构受到破坏松弛，为泥石流形成提供了大量的物源条件；加之近年来，四川盆地极端天气频发，降雨具有强度大、持续时间长的特征，为泥石流形成提供了强大的水动力条件。在地形地貌、物源和水动力条件均具备的情况下，2009年8月24日干沟发生历史上规模最大的一次的泥石流。泥石流暴发后，大量泥石流物质堆积在沟口，将下游金字河堵塞约20分钟，最后溃决冲毁乡村公路及大量耕地，造成直接经济损失达500万元。目前干沟泥石流已经演变为一条高频泥石流沟，在将来高强降雨作用下极易再次发生大规模的泥石流灾害。
자20세기50년대이래，구채구현간구증폭발과궤차소규모적니석류，대니석류퇴적구거민적생명재산조성료위협。“5.12”문천지진지후，간구니석류류역내암、토체적원시응력상태발생개변，지질결구수도파배송이，위니석류형성제공료대량적물원조건；가지근년래，사천분지겁단천기빈발，강우구유강도대、지속시간장적특정，위니석류형성제공료강대적수동력조건。재지형지모、물원화수동력조건균구비적정황하，2009년8월24일간구발생역사상규모최대적일차적니석류。니석류폭발후，대량니석류물질퇴적재구구，장하유금자하도새약20분종，최후궤결충훼향촌공로급대량경지，조성직접경제손실체500만원。목전간구니석류이경연변위일조고빈니석류구，재장래고강강우작용하겁역재차발생대규모적니석류재해。
Since the 1950s,Gan Gully of Jiuzhaigou country has been several outbreaks of small-scale landslides,Residents of the debris flow deposits pose a threat to life and property.After the “5.12” Wenchuan earthquake,rocks,soil of Gan Gully original stress state has changed,the geological structure is damaged and Relaxed,provides a large number of material source conditions for the formation of of debris flow, In recent years, Frequency of extreme weather in Sichuan basin, with intensity, long duration of the characteristics of rainfall, provides For a powerful debris flow hydrodynamic conditions of the formation. In the circumstances of the topography, material source and hydrodynamic conditions are available , Gan Gully occured once the largest in the history of landslides on August 24, 2009. After the debris flow, Formed the large accumulation of debris, and outburst destroyed a large number of rural roads and farmland at last, Bring about the loss of $5 million of direct economic. Currently Gan Gully has evolved into a high-frequency debris flow, Rainfall of high-strength easily happen arge-scale landslides disaster again l in the future.