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都江堰市龙池镇煤炭坪泥石流形成条件及特征

DOI: 10.13577/j.jnd.2015.0215, PP. 115-121

Keywords: 煤炭坪,泥石流,形成条件,特征

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Abstract:

通过对都江堰市龙池镇煤炭坪泥石流灾害的现场调查,分析了泥石流的特征及形成条件,并对沟道内的松散固体物质储量进行了计算,分析了危险区范围.结果表明:煤炭坪流域的地形特征为泥石流的形成提供了有利的地形条件,"5?12"汶川地震和"4?20"芦山地震为泥石流的形成提供了丰富的物源条件,多次强降雨为泥石流的启动提供了充足的水源条件.通过计算得出,煤炭坪沟道内可转化为泥石流的松散固体物质储量约为14.65×104m3,其中形成区为6.01×104m3,流通区为8.64×104m3,泥石流最大危险范围为0.2422km2.

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