Vulnerability evaluation of geological environment based on GIS in Lijiang

This paper is aimed at construction the vulnerability appraisal system of geological environment in Lijiang with multi-system evaluation method. Primarily, the synthesis layer of evaluation was divided into the condition of basic resources (impact factor), environmental conditions (stress factor) and the problem of environmental geology (performance factor), and then establishing twelve factors to be evaluation items, protocoling factor classification along with standard for evaluation as well as analyzing and confirming the weight values of each factor were accomplished. Thereby, on basis of GIS the established evaluation area composed of 8921 assessment units, the evaluation model based on fuzzy comprehensive evaluation method, the data calculated and analyzed, and eventually the vulnerability evaluation regionalization of geological environment in Lijiang were obtained, of which the sub-areas of low vulnerability, relatively low vulnerability, medium vulnerability, relatively high vulnerability and high vulnerability are four, ten, seven, six and two, respectively.