The Evaluation And Research Of A City's Ecological Security

Today, as China's cities large in scale and increase in amount, the city's ecological security problems have gradually become the focus of public attention to the scientific hot issues. Therefore, our understanding of the city's ecological security and the development status of the problem and to suggest solutions strategy on the city's sustainable development will play an important role.The city's ecological security is one of important aspect in ecological security. At the present, such this study just begins, therefore there is no mature theoretical system and evaluation methods.Based on the draw on current domestic and foreign research results ,the paper studys on the basis of the city's ecological security concept, evaluation methods and applications of the research.The paper analyzes and summarizes the ecological security of progress on the ecological security of the content and features. On this basis, it is proposed that the city's ecological security concepts, and given that the city's ecological security definition : it is supported that a state of urban development in a goal within the threshold for the urban sustainable development and protecting the lives of the residents of richecological health of the environment and resources.Basis on analysis of the urban ecological security factor and the impact on the urban ecological security, Hefei city for example. We construct the city's ecological security system of stand- ards. The index system from economic development, environmental protection and social progress in three areas comprising 24 indicators, reflecting the city's ecological security of the main field,and reflecting the city's ecological security of the state. According to the city's ecological security on the system, with the city's ecological security features the level of analysis and principal components analysis method combining the city's ecological security of evaluation. The results of the analysis of Hefei city's ecological security were better.This paper work for the establishment of the city's ecological security evaluation and the future work may draw on the ideas and methods.