【摘要】 汶川地震改变了西南山区的地质环境,所产生的地质灾害效应在2010年8月13日及8月19日的极端天气下导致多地爆发山洪泥石流,其中都江堰龙池地区爆发大规模群发性泥石流。选取龙池区域作为研究对象,利用层次分析-信息量法针对形成泥石流的物源条件进行敏感性分析。选取了8类影响物源分布的因子:公路影响带、海拔、坡度、坡高、植被覆盖率、河流影响带、断裂影响带及岩土体类型,并细分为37个级别,为每个分级评定敏感性权重,利用ARCGIS平台最终生成高、中、低三级敏感性区划图。根据敏感性区划从物源条件上划分了龙池地区泥石流危险性等级,从而确定需要重点进行监测防治的泥石流沟道。更多还原

【Abstract】 Wenchuan earthquake changed the geological environment of the southwest mountainous,effect of geological disasters produced and under the extreme weather on August 13,2010 and August 19 led to many outbreaks of mountain flood and debris flow,including Dujiangyan Longchi area of mass outbreak of debris flow.By using AHP-Information method,Longchi area is selected as the research object to analyze the source material sensitivity of debris flow three conditions.Eight factors including roads in affected zone,elevation,slope,slope,vegetation coverage,the river impact are selected and subdivided into 37 levels.A sensitivity weight is set for each grade and ARCGIS platform is used to generate high,medium and low sensitive zoning maps.The results of the evaluation supplied basis for the possibility of debris flow in the future,and debris flow channels needed to be monitored and constructed are pointed out.更多还原