Risk Assessment For Critical Geological Hazards In Cong Jiang County

In Cong Jiang County,Gui Zhou Province,geographic structures,and stratum lithology are of complicated conditions in line with complex geographic surroundings,formations and varieties.In past years,within the background of massive road construction projects promoted in Guizhou,namely each county to be connected into express highway net and each village to be made reachable by concrete road links.Plus rapid growth of tourism market,human activities in projects development have been found in many places,consequently,problems of environmental diseases are mounting day after another,making Cong Jiang County a highly sensitive place toward geographic disasters,and local economy has been turned out to be hindered,besides,native communities are confronted with risks against loss of properties and life.This paper aims to comprehensively assess risks caused by critical geographic disasters in overall region of Cong Jiang County.It is based upon detailed investigation into critical potential risks of geographic hazards,in line with analysis of local environmental surroundings and geographic status and their distributions.Thorough analysis of factors controlling these disasters,in line with terrains,landforms,stratum,geographic structures as well as human constructional projects,figure out factors which could cause geographic hazards and relative values.Finally,come out with assessment for possibilities of potential geographic disasters,with the help of spatial analysis function of the software,Mapgis.Following above said possibility assessment,take proper factors,by utilizing the software,MatLab,create matrix,determine their influences,and build a mould which is suitable for local conditions to assess level of hazards of geographic disasters.Meanwhile,take sizes of population and economy into assessment of possible loss.Finally,bring out risk assessment for critical geographic hazards in Cong Jiang County,upon availability of quantitative and qualitative analysis,level of hazards,possibilities of loss.Finally,mark risky areas into three different levels,namely highlyrisk,medium risk and low risk.