Analyses on Disaster-forming Characteristics and Post-Thinking of the Mitigation Measures of the Sanyanyu Debris Flow
The August 8,2010 (henceforth 8.8),massive debris flow in Zhouqu shocked the world with its huge losses.Site investigation and research showed the 8.8 massive debris flow in Zhouqu to be both a natural disaster and a human calamity.This debris flow disaster has six characteristics:heavy loss caused by bursting at midnight,a quickly induced disaster after sudden rainfall,a lack of alertness for light rain beyond the mountains,great magnitude with strong disruption,erosion inside the gully while burial outside,and aggravating loss owing to a chain effect.Both natural conditions and anthropic factors led to the outbreak of this massive debris flow; in terms of natural conditions,the steep landform and abundant loose solid matter comprise the basic conditions for frequent occurrence of debris flows,and the extremely heavy rainfall was the immediate cause of this massive debris flow; in terms of anthropic factors,the main causes of heavy loss are unreasonable human engineering activities,such as urban construction debris occupying the discharge channels for the debris flow,and lower design standards for prevention and control works.To effectively prevent and mitigate the reoccurrence of disaster incidents like the Sanyanyu Gully debris flow,various measures are called for,such as geological environmental adaptability evaluation,geological disaster hazard assessment,main gully retaining and deposition area drainage engineering measures,soil and water conservation,monitoring and warning,and a cooperative system of monitoring and prevention by local residents.
Debris flow Disaster-forming characteristic Disaster-inducing factor Formation condition Zhouqu
YU Guo-qiang ZHANG Mao-sheng WANG Gen-long ZENG Qing-ming
Key Laboratory of Loess Landslides,Xian Center of Geological Survey,CGS,P.R.China,710054
国际会议
北京
英文
1-7
2012-10-17（万方平台首次上网日期，不代表论文的发表时间）