摘要
为了研究贵州省瓮安县各类地质灾害在空间上的发育分布规律,根据瓮安县地质环境和地质灾害野外调查资料,运用综合指数法,对区域内地质灾害易发性的影响因素进行量化。通过地理信息系统(GIS)空间分析软件,对其进行计算与叠加,并依据分区的标准,利用ArcGIS软件内置的自然间断点对地质灾害易发性指数图层进行插值处理,得到瓮安县地质灾害易发性分区图。将区域地质灾害的易发性和区域受威胁对象的易损性进行叠加计算,得到瓮安县地质灾害危险性分区图。根据分区结果可知:地质灾害高易发区占全县面积41.52%,地质灾害中易发区占全县面积38.62%,地质灾害低易发区占全县面积19.86%;地质灾害危险性划分为高危险区、中危险区和低危险区3个区,所占面积比例分别为41.00%、42.54%、16.46%。研究结果为该区地质灾害的预防和预警提供了依据,具有一定的工程实践意义。
In order to study the spatial distribution of geological hazards in Weng’an county,Guizhou province,the comprehensive index method was used to quantify the factors influencing the susceptibility of geological hazards in the region,according to the field survey data of geological environment and geological hazards in Weng’an county.Through ArcGIS spatial analysis software,the weighted sums of all impact factor in each evaluation unit was calculated by dividing into ramp element mesh and making analog calculation.Then,it needs interpolation processing of prone degree index layer,then obtaining susceptibility zonation of Geological Hazards in Weng’an County.Risk grades of Weng’an County were calculated by the vulnerability of the threatened objects and susceptibility.Through the evaluation,the areas with high susceptible of geological hazard accounts for 41.52%of the county’s total area.The areas with medium susceptible of geological hazard accounts for 38.62%of the county’s total area.The areas with low susceptibility of geological hazard accounts for 19.86%of the county’s total area.The risk of geological hazard is divided into three areas:high-risk area,medium-risk area and low-risk area.The proportion of area is 41.00%,42.54%,and 16.46%,respectively.The research results provide a basis for the prevention and early warning of geological hazard in this area,and have important engineering practical significance.
作者
应智超
王中美
刘兵
双同钊
YING Zhichao;WANG Zhongmei;LIU Bing;SHUANG Tongzhao(College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China)
出处
《贵州大学学报（自然科学版）》
2020年第3期119-124,共6页
Journal of Guizhou University:Natural Sciences
基金
贵州省科技计划联合基金项目资助(黔科合LH字[2017]7284号)
贵州省科技平台及人才团队计划项目资助(黔科合平台人才[2017]5402号)。
关键词
地质灾害
易发性
危险性
GIS
瓮安县
geo-hazard
susceptibility
risk
geographic information system
Weng’an
