Features and measures of Bainiba gully debris flow in Mianning County
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Abstract:
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.
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