| The debris flow is the most common type in geological disasters, and it makes losses as much as hundreds of billions every year which resulting in a very serious social influence. Faced with serious debris flows, this thesis will evaluate Jiacun village's single debris flow gully's risk by researching it, and supply more basis to properly assure and evaluate the treat to the lives and property of the debris flow disaster.Based on the comprehensive analysis of domestic and international risk assessment of debris flow, this thesis constructs a single-debris flow model for the risk assessment method, which contains three parts, hazard analysis, vulnerability assessment and risk evaluation of debris flow.This thesis will evaluate Jiacun village's debris flow by using single debris flow theory. First of all, based on field surveys,arealy-describing the village's debris flow,and calculates the village's debris flow of three dynamic factors by using the empirical formula and calculated the rainwater amendment act: bulk density of debris flow, debris flow and the maximum outflow debris flow scale,then using use Liu Xilin-single debris flow risk assessment formula to calculate that when the frequency of the outbreaks 5,2,1,0.5,0.2,Jiacun village under the risk of debris flow were 0.34,0.30,0.27,0.28,0.29;then through Jiacun village's calculation of debris flow vulnerability degree,devided especially of the vulnerability scale factor as a detailed delineation of debris flow,after all,it calculated Jia village's outbreak of frequencies in the different degree of vulnerability were 0.85,0.86,0.86,0.86,0.87; then getting a different frequency of the outbreak as the risk of debris flow gully Jiacun village was 0.30,0.26,0.23,0.25,0.25, respectively by using risk calculation formula;finally,this thesis evaluates the loss of property of Jiacun village on the risk of debris flow in order to make some concrete theories-contribution to the management of Jiacun village's debris flow.
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