Ecoloqical Safetyevaluation And Early Warning Research Of Yanji City

The rapid development of economic, ecological security has become an important problem related to human. Based on the need of sustainable survival and development, systematically introduces the status quo of Yanji City ecological security, objective and reasonable evaluation of Yanji City ecological security situation, to explore the causes of ecological security problems and the forecast of the development trend of ecological security, to develop urban ecological regulation and control scheme of constructing urban ecological security pattern, on the premise of ecological environment of sustainable sustainable development strategy and so on all has the important theoretical and practical significance. Yanji City location of the special nature and importance in a unique position, however, the ecological environment has been affected by tourism development and transport infrastructure construction, the impact of human activities, and had been subjected to a certain degree of damage to the ecological environment construction in a certain degree of change. These considerations, Based on the above considerations, based on S-PRD conceptual model, and the gray correlation analysis of Yanji City ecological security assessment, as well as early warning research.First of all, the construction of evaluation index system. The S-PRD conceptual model to water, air, land, and biological sub-system-based, on the basis of indicators selection principles, establishment of an ecological security assessment indicators.Secondly, ecological security evaluation. By constructing the UNES element index, analysis and evaluation of dynamic evolution characteristics of ecological security. The use of gray correlation matrix analysis of ecological security were retrospectively evaluated, explore the impact of 2006-2013 key elements of ecological security. The use of gray correlation matrix analysis of ecological security were retrospectively evaluated, explore the impact of 2006-2013 key elements of ecological security.Finally, ecological security early warning. The use of GM (1,1) model to predict the value of 2014-2018 evaluation and accuracy test, remove unqualified indicators. Based on 2006-2018 the indicators and data for UNES sub-element dynamic evolution trend analysis and evaluation. Construction of evaluation model and its signal warning interval, developing dynamic evaluation, to achieve early warning development speed is not safe for the ecological. Through divides the essential factor ash connection and the target ash sensitive forecast appraisal to UNES, to affects UNES the main essential factor and the major targets or quotas realization early warning.