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通过对龙门山地区2008年9月和2010年8月发生的大规模的滑坡和泥石流地质灾害的实地考察,并在详细分析龙门山北段平通河地震前后输沙率变化情况的基础上,对龙门山地区2008年汶川地震驱动的地质灾害空间分布情况、龙门山地区地形地貌特征和龙门山地区降水空间分布情况作对比分析,获得以下认识:①汶川地震对该区地质灾害的影响将是持续的,震后地质灾害形成的松散物源将以河流为载体,被输送到下游,并对下游水利建设、防洪防涝等产生较大影响;②构造因素(汶川地震)和地形地貌因素为地质灾害发生的根本原因,气候(降水量和降水强度)则为直接诱发因素。
Based on the field investigation of large-scale landslide and debris flow geological disasters occurring in Longmenshan area in September 2008 and August 2010 and on the basis of detailed analysis of the sediment transport rate changes before and after the Pingtonghe earthquake in the northern segment of Longmenshan, The spatial distribution of geological disasters driven by the Wenchuan earthquake in 2008 in mountainous area, the topographical features of the Longmenshan area and the spatial distribution of precipitation in the Longmenshan area, we obtain the following findings: ① The impact of the Wenchuan earthquake on the geological disasters in this area will be continuous After the earthquake, the loose material source formed by the geological disasters will be transported to the downstream by the river as the carrier, which will have a great impact on the downstream water conservancy construction, flood control and flood prevention. Secondly, the structural factors (Wenchuan earthquake) and topography and geomorphology are geological disasters The root causes, climate (precipitation and precipitation intensity) are the direct triggers.