崇义县地质灾害易发性区划评价研究

发布时间：2018-01-31 17:39

本文关键词： 地质灾害层次分析法模糊综合评判法易发性分区　出处：《东华理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：人类的生存环境与地质环境密切相关,近年来地质灾害的发生已经严重制约着我国的经济发展,崩塌、滑坡、泥石流等一系列地质灾害严重威胁居民的生命财产安全,因此针对地质灾害的防治工作已成为当前亟待解决的问题。地质灾害易发性评价是地质灾害早期预警的基础,为地质灾害的防治提供科学的理论依据。本论文以“江西省崇义县1/5万地质灾害调查项目”的实际工作为依托,通过全面收集资料、走访崇义县矿管局、野外踏勘与综合整理,结合易发性分区评价方法对崇义县进行地质灾害易发性分区,主要工作如下:1)通过野外现场踏勘,调查崇义县地质灾害发生的类型,主要有不稳定斜坡、滑坡、崩塌、泥石流及地面塌陷五种类型,其中以滑坡、崩塌、不稳定斜坡为主。通过系统的分析这些地质灾害分布特点,总结出影响研究区地质灾害的影响因素有:地形地貌、地层岩性、地质构造以及人类工程活动等,并在此基础上分析影响因素与地质灾害之间的关系。2)在影响因素中选出地貌、地层岩性、坡度、人工活动、灾点密度等作为易发性评价指标,并建立评价指标体系。采用层次分析法算出这5个因子的权重,其中各因子权值排序:灾害点密度(0.2921)地层岩性(0.2453)地形坡度(0.1715)=地形地貌(0.1715)人工活动(0.1196)。3)通过MAPGIS、ARCGIS软件对这5个评价因子作出子图层后,利用MAPGIS的“空间分析-区对区相交分析”进行叠加,得到的6707个单元。每个单元都通过模糊综合评判法得到相对隶属度,最后再在MAPGIS里面实现崇义县地质灾害易发分区。4)根据崇义县地质灾害易发分区图,崇义县地质灾害易发性划分不易发、低易发、中易发、高易发4个等级,划分的地质灾害高易发区3个,面积798.983平方公里,占全县国土总面积的36.21%;地质灾害中易发区6个,面积773.590平方公里,占35.06%;地质灾害低易发区5个,面积551.999平方公里,占25.02%;地质灾害不易发区4个,面积81.696平方公里,占3.7%。
[Abstract]:Human survival environment is closely related to geological environment. In recent years, the occurrence of geological disasters has seriously restricted the economic development of our country, collapse, landslide. A series of geological disasters, such as debris flow, seriously threaten the safety of residents' lives and property. Therefore, the prevention and control of geological hazards has become an urgent problem. Geological hazard vulnerability assessment is the basis of early warning of geological disasters. This paper is based on the actual work of "1/5 million Geological disaster investigation Project in Chongyi County, Jiangxi Province", and visits the Chongyi County Mine Administration Bureau through comprehensive data collection. Field exploration and comprehensive collation, combined with the risk zoning evaluation method, the main work is as follows: 1) through field field survey, the types of geological disasters occurred in Chongyi County are investigated. There are mainly five types of unstable slope, landslide, collapse, debris flow and ground collapse, among which landslide, collapse and unstable slope are the main types. The distribution characteristics of these geological hazards are analyzed systematically. It is concluded that the influencing factors of geological hazards in the study area are topography, stratigraphic lithology, geological structure and human engineering activities. On this basis, the relationship between influencing factors and geological hazards is analyzed. 2) the geomorphology, stratigraphic lithology, slope, artificial activity and disaster point density are selected as indicators of vulnerability evaluation. The evaluation index system was established and the weight of the five factors was calculated by AHP. The weight value of each factor is 0.2921) the stratigraphic lithology is 0.2453) the slope of the terrain is 0.1715U = the landform is 0.1715) artificial activity (. Through MAPGIS. After making the sub-layer of the five evaluation factors by ARCGIS software, the space analysis-area intersection analysis of MAPGIS is used to stack. The relative membership degree of each unit is obtained by fuzzy comprehensive evaluation method. Finally, in the MAPGIS to realize the Chongyi County geological hazard prone zoning. 4) according to Chongyi County geological hazard prone zoning map, Chongyi County geological hazard vulnerability division is not easy to occur, low prone to occurrence, easy to occur. There are 3 geological hazard prone areas with an area of 798.983 square kilometers, accounting for 36.21% of the total land area of the county. Among the geological hazards, there are 6 areas with an area of 773.590 square kilometers, accounting for 35.06 square kilometers. There are 5 geological hazard prone areas with an area of 551.999 square kilometers, accounting for 25.02 square kilometers; Geological hazards not prone to 4 areas, an area of 81.696 square kilometers, accounting for 3.7.
【学位授予单位】：东华理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P694

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