摘要
在陕西省绥德县地质灾害详细调查的基础上,选取灾害点密度、坡度、坡高、坡型、岩土类型、降雨量以及人类工程活动等因素建立了评价指标体系,采用基于GIS的信息量分析模型对绥德县地质灾害易发性进行了区划,将研究区划分为高易发区、中易发区和低易发区,其中高易发区面积326.04 km2,占总面积的17.4%;中易发区面积1,349.8 km2,占总面积的71.9%;低易发区面积202.16 km2,占总面积的10.7%。通过对绥德县地质灾害易发性区划,以期为该县防灾减灾提供技术支持。
Based on investigation of geohazards in Suide ent, slope type, type of rock and earth mass, rainy water and County, density of geohazards, slope height, gradi- human activities are chosen as 7 evaluation index to establish susceptibility evaluation index system. The study area is finally divided into 3 levels of the high-grade area by using the information content method on the GIS platform. According to the results, the high-grade area covers 326. 04 km2, accounting for 17.4% of the total area ; the medium-grade area covers 1 349. 8 km2, accounting for 71.9% of the whole area and the low-grade area is 202. 16 km2, accounting for 10. 7%. It hopes to provide some technology support to prevent and reduce geohazards by zoning of geological hazards＇ susceptibility evaluation in Suide County.
出处
《灾害学》
CSCD
2017年第1期117-120,125,共5页
Journal of Catastrophology
基金
陕西省地质调查项目(2014SDD0005)
关键词
信息量分析模型
地质灾害
易发性
区划
陕西绥德
the information content method
zoning of geological hazards＇ susceptibility evaluation
SuideCounty of Shaanxi province
