Assessment of Groundwater Specific Vulnerability In Guangzhou Based On Fuzzy Comprehensive Evaluation

This paper have taken into account various factors that may influence the Groundwater Specific Vulnerability, including topography, stratum, hydrogeological and human activity, then selected 9 indices from these factors, used Fuzzy Comprehensive Evaluation, constructed nonlinear fuzzy membership, calculated the membership degrees of each indices, then via the Fuzzy Matrix and combined the GIS technology of spatial analysis,to assess the Groundwater Specific Vulnerability in Guangzhou. The results indicated that there is generally high vulnerability of groundwater in Guangzhou, and the indices of special vulnerability are 2.99~22.16, it can be divided into five vulnerability grades which means the groundwater in Guangzhou is easily polluted. However there are more obvious regional differences.