【摘要】 以汶川地震强震区七盘沟堰塞湖为例,通过野外调查、现场测量,分析了"7.10"泥石流暴发时6个典型堰塞体的溃决特征,给出了堰塞体溃决类型及其溃决后的水动力特征。结果表明,6个典型堰塞体失稳主要以漫顶溢流破坏为主,溃决流量最大值达404.9m3/s。进而确定了堰塞体溃决后泥石流的启动条件,结果可为泥石流预防与控制提供参考。更多还原

【Abstract】 Taking Qipangou gully of Wenchuan earthquake zone as an example,the dam break characteristics of six typical landslide dam in outbreak of " 7.10" debris flow are analyzed by means of field investigation and field measurement.It gives the dam break type of landslide dams and hydrodynamic characteristics after dam break.The results show that the six typical landslide dam is instability,and its main failure is overtopping.The maximum flow rate reaches 404.9m3/s after dam break.Furthermore,the starting condition of debris flow after outburst of dam break is determined,which provides a reference for prevention and control of debris flow.更多还原