Ecological Environment Assessment Of Changshan Salt Mine In The City Of Zigong Based On RS And GIS

Good ecological environment is the basic of human survival and development,The premise of Economic and social development is Maintaining the stability and balance of ecological environment. Currently, there is a great challenge we are facing are the mine ecological environment problems, Inevitably, the mass exploitation and development of mineral resources Destroyed the balance of the original nature ecological environment, the pollution that Mining might produce will also destruct Land and vegetation resources and cause Serious ecological environment problems, Worsening ecological environment bring enormous threat for economic social development and people's Production and living. Therefore, according to the characteristics of ecological environment of the research area, selecting proper evaluation index, establishing accurate and appropriate evaluation model, evaluating the ecological environment of the research area objectively, understanding the quality of the ecological environment, then proposing protection and management measures according to the ecological environment state, is the objective requirement of the mining area environment protection.In this paper,According to the characteristics of ecological environment of Changshan salt mine's in Zigong City and the principle of evaluation index selection make full use of remote sensing and the geographic information system technique, In the support of the topographic map and remote sensing images, select Soil moisture,the land use/cover,topography and landforms,soil alkalization,land pressure and destruction index as influence factors, and each details of ecological environment evaluation index system as index layer, establish the ecological environment evaluation index system of Changshan salt mine, and use analytic hierarchy process to determine the weight of each evaluation index, handle remote sensing data and analysis using remote sensing image processing software, through the combination of visual interpretation and computer automatic extraction extracting evaluation index information, and through quantitative grading and standardization of each evaluation index, using the weighted comprehensive evaluation method to establish ecological environment comprehensive evaluation model of research area, comment on the ecological environment of the reach area, the ecological environment quality is divided into five grades such as excellent,fine,medium,bad and bum.Grading results show that the overall situation of Changshan salt mine's ecological environment is favorable, the ecological environment quality of the excellent and fine and medium are in the majority, of 85 percent of the total area of research, mainly distributed in central and western,east and southwest regions there have enough moisture,good weather condition,low-lying,minor salinization,far away from mineral occurrence; the ecological environment quality of the bad and bum are in the minority, of 15 percent of the total area of research , mainly distributed in east,central and southwest regions,the reason of ecological environment of these areas, besides high elevation,arid climate,heavier salinization, the main reason is that these areas nearby the main mineral occurrence,there are many bad phenomenon exist, such as mine exploitation,brine leaked,residual accumulation, thus seriously affect the region's ecological environment quality, According to this ecological environment situation assessment results, in allusion to existing Ecological environment problems,propose relevant protection programme and recommended practice,to provide reference for the ecological environment restoration,promote the coordinated development of salt resource exploitation and the ecological environment.