兰州市市区地质灾害分布与防治建议

兰州地处中国地理中心,肩负着经济建设和战略转移的重任,同时兰州又是在中国滑坡、泥石流灾害最严重的城市之一。近50年来,共发生地质灾害194次,造成630人伤亡,直接经济损失3.4亿元。新的调查显示,全区地质灾害隐患点394处,其中泥石流126条,滑坡95处、崩塌28处、地面塌陷11处、不稳定斜坡134处。根据危险性评估,威胁特重的有69处,重的有100处,中度的有149处,轻度的有76处。区内地质构造发育、新构造运动强烈,地形地貌复杂,降雨集中,人类活动强烈,通过对兰州市区地形、地貌特点和滑坡泥石流危害及成因分析,提出了防治对策。

DISTRIBUTION OF GEOLOGICAL HAZARDS AND THEIR CONTROL IN LANZHOU

Lanzhou is geographical center of China,where occurred 194 geological hazards which led to 630 persons died and economic losses of RMB 340 million yuan within recent 50 years.The latest investigation shows that there are 394 hidden geological hazards in Lanzhou,including 126 debris flows,95 landslides,28 landfalls,11 ground collapses and 134 unstable slopes.By the discussion of topographic,landform features and genesis of geological hazards of Lanzhou,the protection and control measures are put forward.