Study On The Assessment Of Urban Ecological Security Risk Of Jiangxi Province

With the development of social economy,the process of urbanization in China has been accelerated,the scale of cities has been expanding,and the number of cities has also been increasing.Frequent human activities have brought about economic development and improvement of people’s living standards,but at the same time,they have produced a series of ecological security issues such as housing crisis,environmental damage,resource shortage,and ecological crisis that affect human health.The ecological risk issue is a common concern for human beings to achieve sustainable social development.The development and construction of cities may lead to adverse changes in urban ecological and environmental factors,ecological patterns,and ecosystem services,which will cause adverse effects on the human environment.Therefore,exploring the issue of urban ecological security has become the key to the study of ecological security.Constructing an urban ecological risk assessment system is beneficial to conduct scientific and reasonable assessments,it will provide a theoretical basis for the sustainable development of urban economic society.So far,the research and application of environmental risk assessment is mainly based on the pressure state response(PSR)theoretical framework model for risk assessment,and uses entropy method to determine the weight.The comprehensive index method of ecological risk is used to quantitatively evaluate urban ecological risk.Taking Jiangxi Province and 11 urban districts as the research objects,this paper selects the index data of 10 years to process and calculate,from the consideration of pressure,status and response.The PSR model was used to calculate and analyze the index value of P pressure and S state response,and the comprehensive evaluation index of Jiangxi province was evaluated.On this basis,the paper uses GeoDetector Software(Geographic detector)to detect spatial heterogeneity and reveal the driving force behind it.Finally came to the following conclusion.(1)Through the analysis and evaluation of PSR model,it is concluded that the comprehensive index of urban ecological risk in Jiangxi Province increased slowly in the early stage and was larger in the latter stage.During the 10 th time,the ecological security risk assessment values of all prefectural cities in Jiangxi Province were between Level 2 and Level 4,with little change,and most of them were at the edge of the critical state.Ganzhou has changed from low risk to critical state.Yichun City is in a low-risk state all year round,and the degree of grade is reduced year by year,and we should be alert to changes.(2)According to the analysis of GeoDetector Software,with the passage of time the major driving force indicators of urban ecological security risk in Jiangxi Province have changed greatly in 10 years.In 2006,the driving force of urban natural resources consumption and environmental pollution related indicators was the largest,and the economic factors such as population factors and human activities account for the spring breeze,and the socio-cultural response indicators have a low impact.In 2010,population factors and economic indicators gradually became the key factors,and the humanistic response indicators began to increase the degree of influence.The indicators related to human activities in 2015 have gradually become the most important influencing factor,and the humanities and social response indicators have also become one of the main driving forces.Social development has a certain degree of control over the consumption of natural resources and environmental pollution,and the driving force of the indicator factor of the response has declined.(3)According to the analysis of the driving forces,the major causes of changes in the urban ecological security risk index during the past decade are: the impact of urbanization,the influence of population factors,the impact of social and economic development,and the impact of environmental resources.(4)Based on the above analysis and the actual situation,the corresponding suggestions and countermeasures are summarized.First,expand the advantages of economic development and consider sustainable development.Then further improve the urbanization construction,promote the integration of urban and rural areas,ease the pressure of population expansion,and also effectively control environmental pollution and waste of resources.Finally,we must also advocate the sustainable use of energy and raise awareness of environmental protection.