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基于聚类和最大似然法的汶川灾区泥石流滑坡易发性评价
Alternative TitleSusceptibility Mapping of landslides and debris flows in 2008 Wenchuan Earthquake by using cluster and MLC methods
Language中文
胡凯衡; 崔鹏; 韩用顺; 游勇
Corresponding Author胡凯衡
2011
Source Publication第八届海峡两岸山地灾害与环境保育学术研讨会 ; 第八届海峡两岸山地灾害与环境保育学术研讨会论文集
Pages46-55
Conference Date2011-7-26
Conference Place新疆乌鲁木齐
Funding Organization中国水利学会;中国水土保持学会;台湾中华水土保持学会
Abstract采用聚类分析和最大似然法MLC(maximum likelihood cIassification)评价了汶川极重灾区(四川省部分)震后地质灾害的易发性。这种非监督分类的方法适用于没有足够训练数据的情况,可以快速对 一个大区域的地质灾害易发性进行平估。评价影响因子选择了坡度、相对高差、地表径流深和地震烈度4个反映震后地质灾害的主控因素。聚类分析算法采用k平均 聚类方法,一共将整个研究区域划分为5个子类,分别对应极低、低、中等、高和极高的易发区。得到的易发性评价图表明,在大块的高易发区域内存在一些小的极 低区域。这些区域可以作为安伞的居民点。另外,在极高区域和高易发区以及高易发区与极低易发区分界线附近,地质灾害点分布比较密集。
Other AbstractCluster and MLC(maximum likelihood classification)methods are introduced to map the susceptibility of post-quake geo-hazards in the Ms 8.0 Wenchuan earthquake area.This method is applicable even there is short of training data.Four effective factors are chosen for mapping the susceptibility,including slope gradient,relative relief,seismic intensity and surface runoff.Five clusters are grouped from sampling grid ceils by k-means clustering approach.MLC classifies all of cells in the study area into the five clusters according to their statistical characteristics.Five kinds of susceptibility(very low,low,moderate.high,and extreme high) are assigned to these clusters by virtue of expert experience and geo-hazard density.The fmal map gives a reasonable assessment of susceptibility of post-earthquake goo-hazards in the area. It is also found that there exist safety spots within the region ofhigh danger,which arc suitable for habitations and facilities.
Keyword易发性评价 泥石流 地质灾害 汶川地震 聚类分析
Document Type会议论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5623
Collection山地灾害与地表过程重点实验室
Recommended Citation
GB/T 7714
胡凯衡,崔鹏,韩用顺,等. 基于聚类和最大似然法的汶川灾区泥石流滑坡易发性评价[C],2011:46-55.
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