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2013年4月20日四川省芦山县发生7.0级地震,地震诱发了大量的崩塌滑坡。利用四川省测绘地理信息局和四川省地质调查院提供的芦山县城、太平镇、宝盛乡、龙门乡、清仁乡、上里镇、思延乡等重灾乡镇的震后高精度航空影像进行了地质灾害体的解译,利用GIS分析了芦山地震诱发的崩塌滑坡的空间分布关系和特征。结果表明崩塌滑坡主要受断层控制,距离发震断层3km范围内分布密度最大;坡度是影响崩滑分布的重要因素,崩滑体主要分布在坡度40°～50°范围内;在海拔高度1～1.5km范围内崩塌滑坡密度最大;距水系400m范围内的崩塌滑坡分布密度最大;白垩系泥岩、砂岩出露的地方容易产生大量崩塌滑坡;崩塌滑坡主要集中分布在Ⅸ烈度区。
On April 20, 2013, a magnitude 7.0 earthquake struck Lushan County, Sichuan Province, causing a large number of landslides. High-precision aerial images of post-quake-hit areas such as Lushan County, Taiping Township, Baosheng Township, Longmen Township, Qingren Township, Shangli Township and Siwen Township provided by Sichuan Provincial Geological Information Bureau and Sichuan Geological Survey were conducted The interpretation of geological disasters, the use of GIS analysis Lushan earthquake-induced landslide collapse of the spatial distribution and characteristics. The results show that the collapse landslides are mainly controlled by faults and the distribution density is the largest within 3km from the seismogenic fault. The slope degree is an important factor affecting the collapse-slip distribution. The landslides are mainly distributed in the slope range of 40 ° ~ 50 °. At the altitude of 1 ~ The density of landslides in the range of 1.5km is the largest. The density of landslides in the range of 400m away from the water system is the largest. Cretaceous mudstone and sandstone are prone to produce a large number of landslides and landslides; the landslides are mainly concentrated in the Ⅸ intensity area.