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《Journal of Sichuan University(Engineering Science Edition)》 2009-03
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Optimal Timing for the Control of Debris Flow in Wenchuan Earthquake Area

CHEN Xiao-qing1,2,CUI Peng1,2,ZHAO Wan-yu2(1.Key Lab.of Mountain Hazards and Surface Process,CAS,Chengdu 610041,China;2.Inst.of Mountain Hazards and Environment,CAS,Chengdu 610041,China)  
The Wenchuan earthquake on May 12,2008 has induced many secondary disasters,such as collapses,landslides,dammed lakes,and a great area of loose soils and rocks.The debris flows of larger scales may occur at the stimulus of rainstorms that would cause events of ordinary scales before the quake.Based on the analysis of historic debris flows following the earthquakes and the debris flows in 2008,the optimal opportunity of controlling the potential debris flows was considered.The results indicated that the control measures should be taken three to five years later in the central quake-hit areas.In other affected areas the engineering structures can be extensively made.It is suggested that the projects on the debris flows mitigation works in the most severe areas should be postponed up to three to five years.
【Fund】: 国家重点基础研究发展计划“973”计划(2008CB425802);; 国家自然科学基金资助(40501008)
【CateGory Index】: X43
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