中文摘要：

芦山地震造成了大量崩塌、滑坡.实地调查和相关资料分析表明,芦山地震重力侵蚀数量上以崩塌为主,规模小;滑坡少,但是规模较大.这些侵蚀主要发生在山体的上部和窄深峡谷内.较大规模的崩塌滑坡体均分布在流水深切的窄V型河谷段,岭谷高差越大,山体越陡,表现越明显.芦山地震崩滑的规模与分布首要控制因素是河谷地形地貌;崩塌滑坡分布与断层的距离相关性不如汶川地震明显.河谷深切使得潜在崩滑体具有较大单位崩滑势能,在强震影响下容易出现失稳.在芦山地震释放能量相对较小的情况下,崩塌滑坡发生需要更大势能和更大坡度.由于芦山地震区河谷下切不如汶川地震区强烈,地震震级较小,芦山地震的重力侵蚀总量仅为汶川地震的千分之一.

英文摘要：

The Lushan earthquake caused numerous avalanches and landslides. Field investigations and data analyses revealed that the gravity erosion triggered by Lushan earthquake was mainly avalanches with small vol- ume. Very few landslides occurred but they had large volumes. These avalanches and landslides occured in the upper mountains and V-shaped valleys. The gravity erosion was so closely related to the river bank slope and the higher was the slope the larger was the volume of avalanches. The characteristics of distribution and size of the mass movements were closely related to topography and geomorphology. The distance from the epicenter was not so important for occurrence of avalanches and landslides like that in Wenehuan earthquake. Riverbed incision increased the potential energy for landslides and avalanches and reduced the stability of slope. Com- pared with Wenchuan earthquake,the released energy in Lushan earthquake was smaller, and the depth of in- cised valley in Lushan earthquake area was much less, so the total volume of avalanches and landslides trig- gered by Lushan earthquake was 1 000 times smaller.