Coupling And Coordination Analysis Of Ecological Security And Economic Development Level In Mountain Area Of Northeast Chongqing In The Past 20 Years

The mountain area of northeast Chongqing is an important part of China's ecological function regionalization,and its ecological security status plays an important role in the whole Chongqing City and even the upper reaches of the Yangtze River.The year 2018 is the 20 th Anniversary of Chongqing Municipality.After 20 years of rapid development,the social and economic outlook of the mountain area of northeast Chongqing changed significantly,but the special geographical environment of the mountain area of northeast Chongqing has limited the development of local industry and agriculture to a certain extent.Taking the mountain area of northeast Chongqing(Chengkou County,Wuxi County,Wushan County,Fengjie County,Yunyang County,and Kaizhou District)as the research area,this paper chooses six time nodes(1997,2000,2005,2010,2015and2018)over the past 20 years,applies DPSIR model and comprehensive evaluation method to the ecological security and comprehensive economic development of the mountain area of northeast Chongqing its districts and counties in Chongqing City and made an analytical study of time series and spatial pattern.At the same time,the coupling and coordination relationship between ecological security and economic development level inNortheast chongqing mountainsis analyzed and evaluated.The main results are as follows:(1)The ecological safety index(ESI)of the mountain area of northeast Chongqing has experienced a process of slight decline and then rise in the period of research.From 1997 to 2005,the ESI value of the study area decreased slightly,and after 2005,the ESI value showed an upward trend,and the ESI value increased by 19.12% at the end of the study period.The study area was in a relatively safe level from 1997 to 2015,and rose to a safe level after 2015.(2)The index of comprehensive economic development level of the mountain area of northeast Chongqing showed an upward trend during the research period.The total economic subsystem score and the economic benefit subsystem score both showed an upward trend,but the economic structure subsystem score fluctuated during the study period,indicating that the economic structure of the study area is not reasonable and needs to be adjusted.(3)The C value of the coupling degree between ecological security and economic development level in the mountain area of northeast Chongqing shows a trend of rising first and then declining in 2010,while the D value of coordination value shows a continuous rising state.The overall coupling coordination level of the study area has gone through two major categories: transition-coordinated development,barely coupling coordination-basic coupling coordination-primary coupling coordinationintermediate coupling coordination-benign coupling coordination.(4)The spatial evolution process of coupling and coordination between ecological security and economic development in the mountain area of northeast Chongqing as follows: in 1997,the relative low value of coordination was distributed in the eastern Wuxi and Wushan counties;in 2000,the relative low value of coordination was reduced to Wuxi County;in 2005-2010,there was no relative low value of coupling and coordination value in the study area.In 2015,the relative low value of the coordination degree was located in the south,north and west of the study area,i.e.five other districts and counties except Wuxi County were relatively low value districts;in 2018,the range of the relative low value districts of the study area was reduced to Chengkou County,Wushan County and Kaizhou District.