典型冲沟型泥石流动力学特征——以四川省泸定县麻沙坡沟为例  

Dynamics Characteristics of Typical Groove-Type Debris Flow:A Case Study of Mashapo Groove in Luding County,Sichuan Province

作　　者：徐如阁[1] 铁永波[1] 巴仁基[1] Xu Ruge;Tie Yongbo;Barenji(Chengdu Center of China Geological Survey, Chengdu 610081, China)

机构地区：[1]中国地质调查局成都地质调查中心,四川成都610081

出　　处：《防灾科技学院学报》2017年第4期1-7,共7页Journal of Institute of Disaster Prevention

基　　金：国家自然科学基金项目(41572294);中国地质调查局项目(DD20160272);四川省国土资源厅联合科技攻关项目(0773-1641GNSC01693)

摘　　要：以泸定县麻沙坡沟为例,根据该冲沟的沟特征与沟谷泥石流沟特征相似的结果,采用沟谷型泥石流动力学经验公式计算该沟于2005年爆发的一次泥石流的流速、流量、一次泥石流总量及输砂量,计算得到的泥石流流量、固体物质总量和与现场调查结果较一致,表明沟谷型泥石流动力学经验公式同样适用于冲沟型泥石流,同样说明冲沟型泥石流不同于坡面泥石流,应将其单独划分为一类或归于沟谷型泥石流。Based on the similar characteristic of Mashapo groove of Luding County and the gully-type debris flow,we calculated the flow velocity,the discharge,the transport material volume in total and the sediment discharge of the debris flow in Mashapo groove in 2005 by the dynamics empirical formula of gully-type debris flow. Then,we found that the calculation results of debris flow discharge and solid material volume is coincide with that of the field survey results,which indicates that the dynamics empirical formula of gully-type debris flow is also applicable for groovetype debris flow. It is also indicates groove-type is different from hillslope debris flow,we should constitute its own category or take it to the gully-type debris flow.

关 键 词：泥石流 动力学 冲沟型 麻沙坡沟 泸定县 

分 类 号：P642.23[天文地球—工程地质学]