溪火沟流域松散物源类型及环境地质评价

Loose Material Type and Geological Environment Evaluation to Debris Flow in Xihuo Ravine Area

溪火沟为一条现代泥石流沟,历史上曾暴发过大规模的泥石流,沟内松散物源丰富,按成因可分为原生构造破碎基岩、残坡积和冲洪积物、老泥石流堆积物,松散物源对泥石流的补给方式主要表现为坡面冲刷、滑塌、下蚀切割,其中以滑塌为主。此外,对其做出环境地质评价。

Xihuo ravine with active debris flow had happened large scale debris flow. There is rich loose material in the ravine.According to the forming condition,there are three types：primary structural fractured base rock,eluvium material,alluvium material and diluvium material ,old debris flow accumulation debris. These loose material＇s supplementary to debris flow are scouring,collapse and erosive dissection. Moreover,its geological environment is evaluated.