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为了弄清舟曲特大山洪泥石流灾害发生的原因,根据舟曲县气象局在事发当日实测的降雨量资料以及现场实地查勘和调研情况,从地质构造、河道特性、降雨过程等方面对“8.7”泥石流发生的成因进行了初步分析。结果表明:地形地貌和特殊地质构造是导致泥石流灾害发生的重要原因;突发性暴雨是诱发特大山洪泥石流直接原因;汶川地震及舟曲地区出现严重干旱是引发地质灾害的重要影响因素。对类似灾害提出了针对性意见和建议。
In order to find out the causes of the debris flow disaster in Zhouqu County, according to the data of the rainfall measured on the day of the incident of Zhouqu County Meteorological Bureau and the field investigation and investigation, the paper analyzes the geological structure, the characteristics of the river channel and the rainfall process, 8.7 "The origin of debris flow occurred a preliminary analysis. The results show that topography and special geological structure are the important causes of debris flow disaster. Sudden rainstorm is the direct cause of the debris flow caused by extra-large flash floods. Severe droughts in Wenchuan earthquake and Zhouqu area are the important factors that cause geological disasters. Put forward targeted suggestions and suggestions on similar disasters.