Research On The Evaluation Of Environmental Geological Problem In Mianyang Urban Area Of Sichuan Province

With the development of economy construction in our country city and the extension of the engineering activity scale, the deteriorate rate and the frequency of the geological hazards tend to accelerate. Therefore, how to evaluate these environmental geological problem and environmental geologic quality of city is important to prove scientific basis to the city planning, construction and management and to guarantee the sustainable development of the city society, economy and environments. In this paper, reasonable discussions have been dug into this research domain.In this paper, we take the environmental geologic in the Mianyang urban area as the research objects. On the basis of out-site inspection and detailed analysis of geology data, the author expatiates the city environmental geological setting,geology resources and summaries the environmental geological problems type, scale and distribution characterization in the representative area. The author not only evaluated the geology resources distribution characterization , quantity , the condition and potential of the development but also evaluated the environmental geological problems with corresponding method. The environmental geological problems include the geological hazards , Water pollution and Foundation stability.Secondly, the author constructed the basic index system for comprehensive quality evaluation of environmental geology in the city, definited the criterion of the evaluation factor and given the criterion value of the corresponding factor. This paper respectively evaluated the environmental geologic quality of city area with the grey clustering method and AHP-based two-level fuzzy synthetic evaluation. The results of quantitative evaluation are satisfied with the qualitative analysis. At the same time the paper combined macro qualitative analysis to divide the environmental geologic quality in the city area. In general, the environmental geological quality of the city area is good. The quantitative evaluation method is a new attempt to quality comprehensive assessment of environmental geologic for city area and gets good effect. The study results are accorded with the real geological conditions and have strong practicability. It can become the reference to the quality assessment of environmental geologic for city area in the future.Lastly, with regard to the environmental geological problems of Mianyang urban area, the measures for the problems have been put forward. The relations of influencing each other between the development of city and environmental geological problems have been analyzed objectively. Consideration was given to the sustainable development problem referring to the environmental geological problems conservation.