Research On Ecological Risk Assessment Of Jixi County Based On "Ecological Sensitivity-Ecological Disturbance"

With the acceleration of urbanization process,urban ecological environment problems are facing severe challenges.Under the background of ecological civilization construction of "green water and green mountains are golden mountains and silver mountains",the protection of ecological space has become an important part of urban development and construction process.The risk assessment of urban ecology can get the level and spatial distribution characteristics of urban ecological risk.On this basis,urban planning is a scientific planning with pertinence and protection awareness,which can not only meet the requirements of urban development and construction,but also protect green water and green mountains.It can provide scientific decision-making basis for regulating urban ecology and making urban sustainable development policy.Based on the analysis of the characteristics of urban ecological risk,this paper constructs a comprehensive evaluation model of urban ecological risk based on ecological sensitivity and ecological interference degree,taking Jixi County of Anhui Province as a case study area,so as to provide a reference for the protection and development of ecological space in Jixi County.Firstly,the paper summarizes the research progress and deficiency of ecological risk assessment by combing the theory and practice of ecological risk assessment at home and abroad;secondly,it evaluates the current situation of ecological elements in the study area from different landscape types on the fragmentation and separation degree of distribution status;thirdly,it summarizes the existing research on ecological risk assessment,and constructs "s + D",that is,ecological sensitivity + ecology The comprehensive evaluation model of urban ecological risk based on the interference degree is proposed,the method flow of model calculation is proposed,the comprehensive index of urban ecological risk is obtained,and then the spatial division of urban ecological risk level is completed according to the size of the comprehensive index,and then it is classified into different ecological risk prevention and control areas.Finally,taking Jixi County of Anhui Province as an example,applying the urban ecological risk assessment model and method,five risk areas of low,low,medium,high and high ecology are obtained.On this basis,according to the future development expectation,three levels of ecological risk prevention and control zones are divided into three categories,i.e.level 1,level 2 and level 3.At the same time,targeted strategic suggestions are put forward.Through the study of ecological risk assessment and strategy in Jixi County,Anhui Province,this paper aims to provide theoretical and practical reference for urban ecological risk assessment,and provide scientific decision-making basis for urban ecological environment protection and sustainable development.