Risk Assessment of Geohazards by Using GIS in Gangu County, Gansu Province

详细信息   

• 责任者：Wang Lei (Institute of Geomechanics ; Chinese Academy of Geological Sciences ; Beijing 100081 ; China) ; Zhang Chunshan
• 刊名：Journal of Geomechanics
• 出版年：2011
• 卷期：17(4)
• 关键词：地质灾害 ; geologic hazards ; 甘肃 ; Gansu Province
• 页码：p.388-401
• 图表：9 illus., 4 tables, 23 refs.
• 分类号：1800
• issnNo：ISSN1006-6616
• isbnNo：CN11-3672/P

摘要

 
    

Based on detailed investigation of geo-hazards in Gangu County, the authors made evaluation zoning of geo-hazards risk assessment in Gangu County by using the combined qualitative analysis and quantitative evaluation on the GIS platform. The study area was finally divided into 4 levels of the high-grade area, the medium-grade area, low-grade area, and the very low-grade area. According to the results of landslide hazard zonation, the highgrade area covers gative="False" NumberType="1" TCSC="0" w:st="on">393.19 km², accounting for 25.01% of the total study area; the medium-grade area is gative="False" NumberType="1" TCSC="0" w:st="on">544.04 km², accounting for 34.61%; the low-grade area is gative="False" NumberType="1" TCSC="0" w:st="on">324.69 km², accounting for 20.65%; and the very low-grade covers gative="False" NumberType="1" TCSC="0" w:st="on">310.08 km², accounting for 19.73% of the whole county.