摘要
"5·12"汶川地震灾区的泥石流灾害具有规模超大、群发性等特点。针对这些特点,监测预警将是及时有效而经济合理的防灾手段之一。在分析国内外泥石流预警研究进展的基础上,针对目前地震次生泥石流监测预警实践中的一系列问题,提出了一种基于泥石流形成运动过程的泥石流监测预警体系。该体系从泥石流形成机理研究出发,监测泥石流形成运动各阶段的特征参数,并根据各参数预警阈值建立相应的临灾预警等级,形成了全流域的泥石流综合监测预警体系,适用于汶川地震灾区这种高频率、大规模泥石流的防灾减灾工作。
According to the massive total volume,group-occurring debris flows in the Wenchuan earthquake stricken area,the monitoring and early warning system will be an economic and effective measure.Based on analysis of past performance of debris flow early warning and existing problems,this paper proposed a new debris flow hazard monitoring and early warning system based on the formation and motion mechanism of debris flow.The new system consists of rainfall monitoring,fluid level monitoring,pore-water pressure monitoring,soil moisture monitoring,ground vibration monitoring and video monitoring.And the early warning levels were established after the comprehensive analysis of the threshold values of all these monitorings.It would be suitable to use this comprehensive monitoring and early warning system for protecting debris flow threatened areas in the Wenchuan Earthquake stricken area.
出处
《自然灾害学报》
CSCD
北大核心
2014年第3期1-9,共9页
Journal of Natural Disasters
基金
十二五国家科技支撑计划课题(2011BAK12B02)
国家自然科学基金青年科学基金项目(41201555)
中国科学院水利部成都山地灾害与环境研究所青年基金
中国科学院水利部成都山地灾害与环境研究“一三五”项目
关键词
地震
泥石流
形成过程
运动过程
监测预警
earthquake
debris flows
formation process
motion process
monitoring and early warning system
