汶川地震区特大泥石流分布及活动特征研究

汶川地震区特大泥石流主要沿主中央断裂带（映秀-北川断裂带）、后山断裂带展布，呈带状、线状分布。选取汶川地震区21条典型特大型泥石流进行分析，在研究地质灾害形成的地质环境条件及基本特征的基础上，结合泥石流的流域面积、总物源量、物源分布模数与集中度、冲出规模等综合分析泥石流分布及活动特征，得出了震后特大泥石流在物源、水源及激发条件方面的基本规律。

Study on Distribution and Activity Characteristics of Giant Debris Flow in Wenchuan Earthquake Zone

The giant debris flow in Wenchuan earthquake zone spread along the main central fault belt (Yingxiu-Beichuan Fault) and the fault belt behind the mountain, with zonary and linear distribution. The paper selected 21 typical giant debris flows therein to make analysis in such manner that, on the basis of geological environmental conditions to form geological hazard and its basic characteristics, and in combination with basin area, total sources, source distribution modulus and concentration, and runout scale, the distribution and activity characteristics of the debris flow were analyzed comprehensively. Finally, the basic laws of sources, water supply and trigger condition of post-earthquake giant debris flow, were concluded.