Research On The Indicator System And Methods Of Urban Eco-security Evaluation In Xinjiang

Currently, following with increasing of city scale and number, many cities plunge into plight, such as population growth, environment pollution, water shortage etc. Especially, the ecological environment pollution problem has been restricted further healthy development of city. Understanding the problems of city ecological security and then putting forward counter measure will have an important effect on sustainable envelopments of city in china.Based on systematic analysis of city ecological security in china, this paper applied pressure——state——response model (PSR), selected evaluation indicator, tried to put forward universal evaluation indices system of city ecological security, and divided city ecological security level into five grades, that was ideal safe, relatively safe, critically safe, not safe and the worst safe. The author selected six cities (Urumqi , Altay, Yining, Karamay, Korla, Aksu)as example, and used three comprehensive appraisement approach which was fuzzy overall evaluation, main component analysis and mater element extension assessment to make horizontal estimation of ecological security level for these cities in 2005.According to the result, analyzed the differences of ecological security level among these cities, tested the rationality of evaluation indices system, at the same time, compared these appraisement approaches and selected fuzzy overall evaluation which was better than other appraisement approaches to make vertical estimation of ecological security status for Urumqi city from 1997 to 2005 and analyzed the change trend of ecological security level of Urumqi .According to the concrete analysis of ecological security status of these cities, found the primary ecological security problems, and then, put forward pertinent counter measure to SOlve these problems...