Spatiotemporal evolution analysis of urban ecological environment quality in Xuzhou city during transition period based on RSEI
[Objective]The present paper aimed to explore the spatiotemporal evolution of the ecological environment quality in Xuzhou urban area during the transition period,and to provide a basis for ecological protection and related policy formulation.[Method]Using five-period Landsat data from 2000 to 2020,the Remote Sensing Ecological Index(RSEI)was constructed,and the spatiotemporal characteristics of the ecological environment quality in Xuzhou urban area were analyzed based on Pearson correlation coefficient,spatial autocorrelation and other methods.The geodetector was used to detect the main factors affecting the ecological environment quality.[Result](i)The RSEI value of the study area fluctuated between 0.5 and 0.6 from 2000 to 2020,indicating that the ecological environment quality was unstable;the low-grade ecological environment quality was mainly distributed in Yunlong district,Quanshan district and Gulou district,while the high-grade ecologi-cal environment quality was mainly distributed in Tongshan district and Jiawang district;(ii)The area proportion of the improved ecological environment quality from 2000 to 2020 was 35.70％,while the area proportion of the deteriorated ecological environment quality was 23.23％.There was a significant negative correlation between the ecological environment quality and its change,and the higher the RSEI grade,the easier it was to deteriorate,and the lower the RSEI grade,the easier it was to improve;(iii)The ecological environment quality had obvious spatial clustering characteristics,and the high-high clustering area was distributed in Tongshan district,while the low-low clustering area was mainly distributed in Yunlong district,Quanshan district,Gulou district and Jiawang district.In the past 20 years,the standard devia-tion ellipse of the high-high clustering area showed obvious directionality,and always presented a'northwest-southeast'distribution pattern,while the standard deviation ellipse of the low-low clustering area presented a'southwest-northeast'distribution pattern;(iv)The geodetector results showed that all the influencing factors were significant,and the dominant factor was greenness,and the interaction effect of the two fac-tors was obvious.[Conclusion]The ecological environment quality of Xuzhou urban area improves after the transition,and the ecological gov-ernance achieves some results.
NETL
NSTL
万方数据
