Research On Urban Ecological Safety Assessment Of China

As the population growth and the development of social economy, human society activities on the environment in increasing the pressure generated, contradiction between human and land has intensified. Although in the world on the ecological environment construction has made considerable achievement, but were unable to fundamentally reverse the trend of environmental reverse evolution; By environmental degradation and ecological destruction and triggered by environmental disaster and ecological catastrophe didn't get slow, global warming and rising sea levels, ozone hole appear to be expanded rapidly, and biodiversity in relation to such global plummeted human itself safe ecological problems, and again to human alarming. Whether as individuals, settlements, residential, or as a regional and national security, are faced with the challenge of from ecological environment. Ecological security and defense security, economic security, financial security already have equally important strategic position, and constitute a national security and regional security the important content. Keeping the global and regional ecological safety, environmental and economic sustainable development, has become the international society and human common consensus.Urban ecological safety is an important aspect of ecological safety; urban ecological security is a national or regional ecological security foundation and core. The city is a highly artif icialization natural-economic-social compound ecological system. Urban social economic development and ecological environment will determine the interests of the coordination of urban ecological system security, and urban ecological system security can not only satisfy the urban development of resources and environment, and the demand from ecological sense considering is active and healthy. The essence of urban ecological safety is to ask the natural resources in the urban population, social economic and ecological environment, and three constraints to achieve stability, coordination, orderly and sustainable utilization. Urban ecological safety related research will bring the city's sustainable development and urban ecological safety management and to improve the theory basis.This article is divided into six chapters. The first chapter for the introduction, including the research background and purpose and data sources; The second chapter presents some of the theory of ecological safety; The third chapter is urban ecological safety evaluation index system is established, in turn, will index system of data is divided into four tiers include twenty-six indicators, and considering the establishment of standard after a set of urban ecological safety evaluation standards; The fourth chapter are the urban ecological safety evaluation, the selection of Beijing, Shenyang, Dalian city with three cases respectively, the principal component analysis, the grey correlation method and the fuzzy comprehensive evaluation method to three areas of urban ecological safety evaluation; The fifth chapter is to Dalian 2005-2009 urban ecological safety evaluation and comparative analysis of longitudinal, and puts forward some improvement Suggestions of ecological safety in Dalian.The purpose of this study is to urban ecological safety assessment rating, finally come to Dalian urban ecological safety level at a safe, and concluded that the results of the evaluation of consistent with the facts. According to the evaluation results and selecting indicators of the urban ecological safety influence, advances some corresponding Suggestions.