【摘要】 本文重点以天山阿拉沟地区为例,在野外实地考察的基础上,对干旱区暴雨泥石流活动特性进行了分析,并提出对策。更多还原

【Abstract】 The rainstorm mudflow occurred frequently in the past several years in thearid area of China, which has threatened the securities of human livesand property. The mudflow here possesses the special activity features,being obviously different from both of mudflows occurring in moist andsemi-moist areas, and of glacial and snow-melting mudflows. This paperis meant to analyze their activity characters. The data used here werecollected from the field expedition conducted in the summer of 1990. The mudflows are characterized by the combination of their originalconditions. In arid area, the ecologic environment is fragile with sparevegetation, the precipitation and landform conditions that is essecial toinduce a mudflow are not as usual. The areas where the mudflows takeplace are dependent on the rainstorm-fallen areas, that is, the mudflowsoccur near the central zones of the rainstorms with small extent andobvious localization. The tracks of mudflows are short, that means thetracks can be also considered as the starting zones. The run-out zonetakes the shape of a fan, whose solid materials mainly consist of weathereddebris with the boulder being seldom seen. The reoccurrence intervals ofthem are long, ranging from more than ten years to several decades. Theenergetic and rapid geelogical-geomorphological process is characteristicof the mudflows with serious hazards.更多还原