地质学报Issue(6)：179-190,12.
“4·20”芦山地震诱发地质灾害基本特征及与“5·12”汶川地震对比分析
Basic Characteristics of Geohazards Induced by Lushan Earthquake and Compare to Them of Wenchuan Earthquake
摘要
Abstract
At 8∶02 on April 20,2013,Ms 7•0 earthquake happened in Lushan county (30•3°N,103•0°E), Yaan,in Sichuan province,where located on the Longmenshan fault zone in eastern Tibet Plateau.In this paper,the basic characteristics,their forming mechanisms and typical cases of geohazards induced by “4· 20”Lushan earthquake were analyzed,and with comparison on the differences of “5 · 12 ”Wenchuan earthquake,then the relationships between geohazards and magnitude, fault nature of activities, geomorphology,slope angle,seismic intensity in the two earthquakes area.Some conclusions are as follows:①There are four categories of geohazards induced by Lushan earthquake,landslides,collapse (rolling stones),debris flows and unstable slopes,and comparing to Wenchuan earthquake area,lower number,smaller scale and volume of shallow landslides or collapses,mainly concentrated in high alpine valleys and steep slope areas.②There are very similar characteristics and topography pregnant disaster conditions between the Lengmugou gullies in Baoxing County of Lushan earthquake zone and Sanyanyu gullies in Zhouqu County,2010,where affected by Wenchuan earthquake in 2008.③There are four types of forming mechanisms of geohazards induced by Lushan earthquake, they are cracking-rockslides-collision-scraping and then debris flows,cracking-rockslides,vibration-rainfall-rockslides-landslide and then debris flow, vibration-throwing or scrolling. Many hazards controlled by the coupling effect mechanism of endogenic and exogenic geological processes after earthquakes.④ Because of the differences of magnitude,fault nature of activities,geomorphology,topography,the geohazards induced by these two earthquakes are represented obvious similarities and differences,the type of disasters are same and the numbers,scales and volumes,casualties are significant different.关键词
芦山地震/汶川地震/地质灾害/基本特征/对比分析Key words
Lushan earthquake/Wenchuan earthquake/geohazards/basic characteristics/analysis引用本文复制引用
殷志强,赵无忌,褚宏亮,孙巍..“4·20”芦山地震诱发地质灾害基本特征及与“5·12”汶川地震对比分析[J].地质学报,2014,(6):179-190,12.基金项目
本文为国家自然科学基金项目（41372333）和国土资源公益性行业科研专项（201211055）资助成果。 （）
