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《China Railway Science》 2006-05
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Debris Flow Hazard Assessment Based on Extension Method

KUANG Le-hong,XU Lin-rong,LIU Bao-chen(School of Civil Engineering and Architecture,Central South University,Changsha Hunan 410075,China)  
By applying matter-element theory,extension set theory and dependent function calculation of extension method,the classical and limited matter-elements of debris flow hazard assessment were set up,and an extension model of the multifactor synthetic assessment on the debris flow hazard was established as well in this paper.Ten factors,such as selected debris flow scale,occurrence frequency of debris flow,drainage area,length of main ditches,maximum relative altitude in drainage area,incising density,bending coefficient of major ditch bed,length proportion of debris supplement section,maximum rainfall in 24 hours and population density,etc,were used to evaluate debris flow hazard based on extension model.Hazard assessment was conducted on eight typical debris ditches,and objective and reasonable assessment results were obtained.Compared with other assessment methods,this method can reflect more objectively and truly the hazard degree of actual debris ditch.Therefore,the extension theory is more effective and practical in assessing debris hazard.
【Fund】: 铁道部科技研究开发计划项目(2005F024)
【CateGory Index】: P642.23
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