Volume 19 Issue 3
Jul.  2011
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MENG Qinghua, SUN Weifeng, WANG Tao. 2011: GIS Based Four Zones of GEOHAZARD SUSCEPTIBILITY Degrees for FENGXIAN COUNTY in Qinling Mountains of SHAANXI PROVINCE. JOURNAL OF ENGINEERING GEOLOGY, 19(3): 388-396.
Citation: MENG Qinghua, SUN Weifeng, WANG Tao. 2011: GIS Based Four Zones of GEOHAZARD SUSCEPTIBILITY Degrees for FENGXIAN COUNTY in Qinling Mountains of SHAANXI PROVINCE. JOURNAL OF ENGINEERING GEOLOGY, 19(3): 388-396.

GIS Based Four Zones of GEOHAZARD SUSCEPTIBILITY Degrees for FENGXIAN COUNTY in Qinling Mountains of SHAANXI PROVINCE

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  • Received Date: 2010-12-20
  • Rev Recd Date: 2011-05-12
  • Publish Date: 2011-06-25
  • Regional geo-hazard susceptibility assessment is the basis for early warning of geo-hazards.To develop assessment methods of geo-hazard susceptibility in Qinling Mountain area,the distribution and the main influencing factors of geo-hazards in Fengxian county,Shaanxi province are comprehensively analyzed based on the geo-hazard investigation and mapping of 1 :50000 scale.With GIS and information model,the geo-hazard susceptibility evaluation of the whole area of Fengxian County is carried out.According to the result,the distribution of geo-hazard is mainly affected by river erosion,vegetation coverage and human activities.The whole area can be divided into four categories: the high grade area,which covers 190.3km2,accounting for 6.0% of the total study area; the medium grade area,which covers 642.0km2,accounting for 20.1%; the low grade area,which is measured 1314.5km2,taking up for 41.2%; and the stable area that is measured 1040.1km2,taking up for 32.6%.The results can provide a basis for construction layout and geo-hazard prevention and reduction in Fengxian County and also provide the guideline for geo-hazard susceptibility zonation in other counties of Qinling Mountain area.
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