为获取汶川地震效应下滑坡空间分布的变化规律,针对川北山区2002-2010年的滑坡案例数据,构建了4个表征不同时间尺度的滑坡子集,对比分析了汶川地震同震滑坡、地震前后降雨型滑坡的个数、比例、密度以及与滑坡发生密切相关的5个因子(坡度、岩性、高程、距断裂带距离和降雨)的敏感性。结果显示,汶川地震震后3年中,中型滑坡的比例由震前的2.29%增大至16.86%;滑坡的坡度优势区间由10°~15°推高至30°~45°,高程优势区间由400~600 m推高至800~1200 m,距断裂带距离的优势区间由震前0~15 km缩短至0~10 km;松散堆积层上滑坡分布密度迅速扩大;滑坡对降雨的反应时间较震前明显缩短,且震后滑坡的临界降雨量值较震前降低。这些结果表明,汶川地震的发生改变了川北山区的滑坡发育条件。 In order to obtain the variation of landslide distribution under the Wenchuan earthquake effect, four landslide subsets that characterize different time scales are constructed according to the landslide case data from 2002 to 2010 in the mountainous area of ​​North Sichuan. The coseismic landslides in Wenchuan earthquake, rainfall before and after the earthquake The number of landslides, their proportion, density and the sensitivity of five factors (slope, lithology, elevation, distance from the fault zone and rainfall) closely related to the landslide. The results show that in the three years after the Wenchuan earthquake, the proportion of medium-sized landslides increased from 2.29% before the earthquake to 16.86%; the slope-dominant range of landslides was pushed up from 10 ° to 15 ° to 30 ° to 45 °, From 400-600 m to 800-1200 m, the dominant distance from the fault zone is shortened from 0-15 km to 0-10 km before the earthquake. The distribution density of landslides on loosely accumulated layers is rapidly expanding. The response time of landslide to rainfall Which is obviously shortened before the earthquake and the critical rainfall value of the post-earthquake landslide is lower than before the earthquake. These results show that the occurrence of the Wenchuan earthquake changed the landslide development conditions in the mountainous areas of northern Sichuan.