中文摘要：

2008 年 5 月 12 日的 Wenchuan 地震触发了大量 geo 危险。大雨在 2010 年 8 月 13 日与超过 600 万立方的米的全部的体积触发了碎片流动，碎片流动破坏了在 Wenchuan 地震以后造的 500 幢房子和基础结构。学习区域 Qingping 镇位于中国的四川盆的西北的部分，它需要第二重建和碎片流动的批评评估。这研究作为学习单位拿盆并且把倒塌，山崩和碎片流动危险定义为一个 geo 危险系统。由主要系列系统组成的一个 multimode 系统和第二等的平行系统被建立在 Qingping 镇的 138 排水盆评估碎片流动的危险等级。评估结果显示出 30.43% 学习盆(42 盆) 和 24.58% 学习区域，在盆数量的极其高或高的危险等级，和盆数量的百分比和在有危险等级的增加的不同危险等级减少的区域的百分比。根据从有在 Wenchuan 地震和 8.13 大碎片流动以后的 0.5-m 分辨率和领域调查的无人的飞机图象的解释的geo危险数据，在 Wenchuan 地震以后增加的山崩和倒塌的比率和极其高或高的危险等级的比率显然多于中等或低的危险等级。在在 Qingping 镇区域的 8.13 大碎片流动以后的 23 geo 危险都与极其高或高的危险等级在盆发生了，并且 9 碎片流动在有极其高的危险等级的盆。当盆作为学习单位被拿时，为批评评估的 multimode 系统的模型能精确预报不仅倒塌和山崩而且碎片流动。

英文摘要：

The Wenchuan Earthquake of May 12,2008 triggered large numbers of geo-hazards.The heavy rain on 13 August 2010 triggered debris flows with total volume of more than 6 million cubic meters and the debris flows destroyed 500 houses and infrastructure built after the Wenchuan Earthquake.The study area Qingping Town was located in the northwestern part of the Sichuan Basin of China,which needs the second reconstructions and the critical evaluation of debris flow.This study takes basin as the study unit and defines collapse,landslide and debris flow hazard as a geo-hazard system.A multimode system composed of principal series system and secondary parallel system were established to evaluate the hazard grade of debris flow in 138 drainage basins of Qingping Town.The evaluation result shows that 30.43% of study basins（42 basins） and 24.58% of study area,are in extremely high or high hazard grades,and both percentage of basin quantity and percentage of area in different hazard grades decrease with the increase of hazard grade.According to the geo-hazard data from the interpretation of unmanned plane image with a 0.5-m resolution and field investigation after the Wenchuan Earthquake and 8.13 Big Debris Flow,the ratio of landslides and collapses increased after the Wenchuan Earthquake and the ratios of extremely high or high hazard grades were more than moderate or low hazard grades obviously.23 geo-hazards after8.13 Big Debris Flow in Qingping town region all occurred in basins with extremely high or high hazard grades,and 9 debris flows were in basins with extremely high hazard grade.The model of multimode system for critical evaluation could forecast not only the collapse and landslide but also the debris flow precisely when the basin was taken as the study unit.