河北太行山区木作沟泥石流形成条件及特征分析

通过对太行山区木作沟泥石流实地勘查，分析并总结了该沟泥石流形成条件及发育特征.在此基础上，采用经验公式法计算了木作沟泥石流运动特征参数值，即4条主要支沟典型断面处泥石流流速、峰值流量、整体冲击力等参数，进一步分析了泥石流活动及发展趋势，最后计算得到泥石流最大危险范围.研究结果表明：木作沟具有利于泥石流形成的地形条件、气象水文条件及物源条件；泥石流易发程度为易发，发展阶段为壮年期，并逐步向衰退期过渡.综合判断木作沟具备再次发生泥石流的条件，对沟内居民仍具有严重威胁.建议在泥石流形成区设置谷坊坝，在流通区修建排导渠.

FORMING CONDITIONS AND CHARACTERISTICS OF MUZUOGOU DEBRIS FLOW IN TAIHANG MOUNTAIN AREA,HEBEI PROVINCE

Through the field survey of Muzuogou debris flow in Taihang Mountain area, the paper summarizes its formation conditions and development characteristics. On this basis, the empirical formula method is used to calculate the parameters of movement characteristics of Muzuogou debris flow, including the flow velocity, peak flow and overall impact force of debris flow at typical sections of the four main branch gullies, to further analyze the development trend and calculate the maximum dangerous range of debris flow. There are topographic, hydrometeorological and provenance conditions conducive to the formation of debris flow in Muzuogou. The susceptibility of debris flow is high, with the mature development stage, gradually transiting to decline stage. From the above, it is inferred that Muzuogou has the condition for another debris flow, which still seriously threaten the local residents. It is suggested that check dams be set up in debris flow formation area and drainage channels built in circulation area.