不同坡度条件下非均质泥石流堆积过程与特征  

Analysis on the deposition processes and characteristics of non-homogeneous debris flow

作　　者：舒安平[1] 张欣[1] 唐川[2] 潘华利[3] 

机构地区：[1]北京师范大学环境学院水沙科学教育部重点实验室,北京100875 [2]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610000 [3]中国科学院水利部成都山地灾害与环境研究所,四川成都610041

出　　处：《水利学报》2013年第11期1333-1337,1346,共6页Journal of Hydraulic Engineering

基　　金：国家自然科学基金项目(10972042);国家重点基础发展计划项目(2011CB403304);中国科学院山地灾害与地表过程重点实验室开放研究基金资助项目;地质灾害防治与地质环境保护国家重点实验室开放基金资助项目(SKLGP2012K027)

摘　　要：陡峻的地形、大量松散的固体物质条件、短时强降水构成了泥石流发生的三大要素,同时也是直接影响泥石流堆积数量与规模的重要因素。通过改变泥石流流通区、堆积区不同区段的坡度对非均质泥石流堆积过程进行室内模拟实验,探究流通区、堆积区不同坡度条件下非均质泥石流的堆积厚度、面积等特征值的变化特征,即随着流通区坡度增大,泥石流堆积厚度减少,而堆积面积和体积均增大,并进一步建立了不同坡度因子与泥石流堆积数量之间的关系,为预测不同坡度地形条件下泥石流堆积规模提供科学依据。Basic conditions of debris flow formation generally include steep slope, loose solid particle and heavy rain, which are influenced on the deposition of non-homogeneous debris flow. A series of deposition simulation experiments for non-homogeneous debris flow were carried out in lab. By means of the changing of hydraulic gradient and specific weight gravity, the influences of gradients on the deposition of non-homo- geneous debris flow were studied. Furthermore, the meaning relations between the deposition and gradients were established. The results above are significant for predicting deposition scales and disasters control proj- ect for debris flow.

关 键 词：非均质泥石流 坡降 容重 堆积量 

分 类 号：TV144[水利工程—水力学及河流动力学]