Hefei Land Ecological Security Early Warning And Regulation

Land is the cornerstone of human development,and it is the most basic production and living resources.The security of land ecology is directly related to the safety of human production and life and the sustainable development of social and economic.Hefei is the capital of Anhui province.It has been developing at an alarming speed in recent years,and its development results are common.It has shown its unique location advantages.However,in the development process,the disturbance of land use structure is difficult to avoid.Therefore,in this context,it is necessary to study the land ecological security of Hefei for early warning and control.According to the early warning theory,first selects 27 typical indexes combined with the development status of relevant previous research results and the city of Hefei,the construction of early warning of land ecological security evaluation index system of Hefei City,using the entropy weight method to determine the weight of each index,land ecological warning value of Hefei City from 2011 to 2016 by TOPSIS model.Secondly,the GM(1,1)model is used to predict the land ecological warning value in Hefei from 2017 to 2020.Finally,the land ecological police situation in Hefei was simulated and regulated,and the main factors to restrict the ecological security of land were found,and the corresponding countermeasures were put forward.The conclusion of the study mainly includes the following points:The land ecological security alert in hefei from 2011 to 2016 is the central police,the central police,the light police,the light police,the light police and the light police,the warning value is 0.3988,0.3905,0.4028,0.4388,0.4972 and 0.5579.On the whole,there is a rising trend,and the land ecological security situation is improving year by year.From the central police to the light police,it is close to the warning state,but there is still a warning.From each subsystem,the change trend of the land ecological security early warning value of the driving layer decreases after the first rise.The change trend of the warning value of the land ecological security in the pressure layer and the response layer was first decreased and then increased.The early warning value of land ecological security in the state layer is the tendency of slow decline.The change trend of the early warning value of land ecological security of the affected layer presents the inverted "S" type.Hefei city from 2017 to 2020,the total land ecological system and early-warning prediction results of each subsystem are as follows: the next four years in hefei general land ecological security situation will gradually improve,in addition to the state of each subsystem layer of land ecological security warning value no obvious rise,the rest of the subsystem of land ecological security warning value rising to some extent,the driving force,pressure layer and response rise significantly.After the simulation and regulation of land ecological security of HeFei: it was concluded that all subsystems were adjusted,the percentage of sensitive change was 15.92%,and the improvement of land ecological security was the most obvious.The control effect of each subsystem is the most obvious,and the percentage of sensitive change is 8.66%.The second is the pressure and influence subsystem,the percentage of sensitive change is 4.08% and 2.98%;The control effect of driving force and response subsystem is not significant.Only the sensitive factors were regulated,the effect was obvious after regulation,and the percentage of sensitive change was 9.22%.Finally,the paper puts forward some countermeasures and Suggestions on the current situation of land ecology in hefei.