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0 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211 39 万m3 , 可能参与泥石流活动 的物源动储量为41 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0 的措施进行泥石流工程防治。

Bainiba g ully is located in the middle section of the fault zone in the Anning River, where debr is f low is well dev eloped due to the influence o f ver tical lifting and depr essing w ith difference in fault blo cks. Based on the quantit ative calculation of the area2alt itude analy sis metho d, the g eomo rphic development is in the adult stage and beneficial t o the fo rmatio n of debris f low , and the hazard po tential g rade o f debris flow is medium. The debris flow so urce co nsists of four part s, including ebo ulement ac2 cumulatio n, landslide accumulatio n, gully depo sit, and slo pe er osion mater ial. The to tal quantit y of loose solid mater ial is 211 39 @ 104 m3 , and the possible dy nam ic r eser ve contr ibut ing to t he debris flow is 4. 88 @ 104 m3 . Thr ough site investig atio n and analy sis, the instability o f dynamic environment in the basin is the main facto r to cause debr is f low , and the o ccur rence pr ob2 ability of small2 and medium2sized viscous debris flow is mo re than 85%. The pr oposed measur es fo r debr is flow preventio n ar e mainly multilevel o bstr uction.

四川省教育厅科研项目/ 基于GIS 的西昌市北部安宁河东岸泥石流调查及风险度评价0 ( 14CZ0022)