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白泥巴沟位于安宁河断裂中段,受断块差异升降运动影响,泥石流活动发育。根据“面积-高程分析法”定量计算,白泥巴沟地貌发育处于壮年期,利于泥石流的形成,泥石流潜在危险性等级达中型。泥石流的物源由崩塌堆积物、滑坡堆积物、沟道堆积物和坡面侵蚀物四部分组成,松散固体物源总量为21.39万m3,可能参与泥石流活动的物源动储量为4.88万m3。通过实地调查分析,该流域环境动态的不稳定性,是造成泥石流易发的主要因素,暴发中小型黏性泥石流的机率达85%以上。建议采用“以拦为主、多级拦挡”的措施进行泥石流工程防治。
The white mud ditch is located in the middle section of the Anninghe fault and is affected by the differential up-and-down movement of the fault blocks. The debris flow activity develops. According to the “Area-Elevation Analysis” quantitative calculation, the development of the white muddy ditch is in its prime of life, favoring the formation of debris flow, and the potential risk of debris flow is medium. The source of debris flow is composed of four parts: collapse deposits, landslide deposits, channel deposits and slope erosion. The total amount of loose solid sources is 213,900m3, and the source reserves of reserves that may participate in debris flow activities are 48,800m3 . Through field investigation and analysis, the instability of the environmental dynamics of the basin is the main factor causing the mudslides to flow easily, and the probability of medium and small viscous debris flow outbreaks is over 85%. It is recommended to adopt “measures to stop the block, multi-level block” to prevent and control debris flow.