Ecological Security Evaluation And Control Measures In Xichuan County

The ecological environment is the foundation of human survival and development space.With the speeding up of urbanization process,the social productivity relative to promote lead to the more original resource depletion.Various environmental and ecological crisis problems threat to human health serious.Regional security status is directly related to its sustainable development.With the development of social economy and the rapid population growth,human activity is causing environmental pressure increasing intensity and lead to the development and utilization of resources and environment continues to increase.Excessive consumption of resources for ecological environment suffered serious human disturbance.Caused by the ecological destruction and environmental degradation along with environmental disasters and ecological disaster impact national security,regional development and social progress.Therefore,the ecological security problems are highly valued in worldwide.However due to the lack of the mechanism of ecological security,ecological security status can not directly measured,the basis and focus on ecological security is focused on Evaluation of ecological security,ecological security evaluation is to understand the ecological safety level of urban areas or quantitative,but the research of many ecological security problems is difficult to fully reflect the regional ecological security the problem.Therefore,ecological security has become a hot issue that need be solved urgently.Taking Xichuan County as an example,on the basis of "pressure-state-response" model(PSR model),combining with social,economic and natural factors,29 representative evaluation indexes are selected,and the evaluation index system of ecological security in Xichuan county is constructed through the PSR evaluation model.AHP is used to calculate the index weight,and the comprehensive index method is used to analyze the temporal and spatial dynamics of ecological security in Xichuan county.In terms of time scale: analysis of the township of Xichuan County in Xichuan County 2000-2015 years ecological security status changes;in terms of spatial scale: the study in 2000,2005,2010 and 2015 for the time node of Xichuan County township(town)to evaluate the ecological security status,the focuson Township Xichuan county(town)the spatial difference and changes of ecological security status.Based on the analysis of ecological security of Xichuan County driving mechanism and change law,On this basis,the ecological safety index system of Xichuan county is evaluated and analyzed.The results show the driving mechanism and change law affecting the ecological security factors in Xichuan county.Finally,combined with the main problems of the county ecological security,the countermeasures and suggestions are put forward to promote and improve the ecological security situation in Xichuan County,for the research area.The improvement of ecological security provides reference and countermeasures.