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汶川大地震对地质环境影响很大,由于大地震的影响,其震前震后的地质灾害类型、数量等发生了很大的改变。本文通过搜集前人资料,现场调查,分析了汶川大地震前后汶川县地质灾害的变化。结果表明,地震前汶川县地质灾害类型主要以泥石流为主,地震后,汶川县地质灾害类型主要为崩塌,其次为泥石流和滑坡。地震使汶川县地质灾害数量极大增加,同时,也使得其主要地质灾害类型发生改变。
Wenchuan Earthquake on the geological environment has a great impact, due to the impact of the earthquake, its geological disasters after the earthquake type, quantity, etc. have undergone great changes. In this paper, through the collection of previous data and field investigation, the change of geological disasters in Wenchuan County before and after Wenchuan Earthquake was analyzed. The results show that the main geological disasters in Wenchuan County before earthquakes are mainly debris flow. After the earthquake, the main types of geological disasters in Wenchuan County are collapses, followed by debris flows and landslides. The earthquake caused a tremendous increase in the number of geological disasters in Wenchuan County, meanwhile, changed the types of major geological disasters.