作　　者： ;

机构地区： 嘉应学院土木工程学院

出　　处： 《嘉应学院学报》 2013年第5期31-35,共5页

摘　　要： G212线陇南段有泥石流沟575条,严重危害公路交通,为保证G212的安全运营,有必要对其沿线泥石流进行特征分析及易发性研究.以大吉沟泥石流为例,分析其流域特征、成因特征及形成机制,选用合理的经验公式确定其主要运动和动力学特征值.在此基础上,建立了一简捷、实用的泥石流易发性评价模型,采用该模型对大吉沟的易发性进行评价,评价结果与该泥石流的现状及发展趋势较一致,易发性等级为中易发.证明该方法是可行的,具有一定的实用价值.泥石流易发性模型的建立可为泥石流预测预报以及防治工程提供依据. There are 575 debris flow gullies along G212 ,which are threating the highway tragic. In order to ensure the safe operation of G212, it is necessary to analyse debris flow＇s feature and risk. Based on the measured data, this paper analyses Dajigou debris flow＇ s watershed features, genesis and formation mechanism, then selects reason- able empirical formuls to determine avalues of its main features. On this basis, a simple and practical.susceptibility assessment model of debris flow is established. Minimum square method for power is used to determine weight, which can ensure the accuracy of the weights. Dajigou debris flow is evaluated by this model and the result is the middle - susceptibility. The result is consistent with hazards status and activities trend. So the model for debris flow hazard assessment is effective and feasible, with certain theoretical and practical significance.

关 键 词： 大吉沟泥石流 易发性 特征 形成机制

领　　域： [天文地球] [天文地球] [天文地球]