Land Use Change And Ecological Environment Quality In Taihu County Research On Spatial Relationships

Land use change is the core driving force that causes regional ecological environment changes.With the continuous advancement of urbanization,the game between land use and ecological environment has attracted more and more attention of the general public.It is an important proposition to build an ecologically civilized city in the new era to explore the changing characteristics of land use and ecological environment quality in Taihu County over a long period of time,and to coordinate the relationship between ecological environmental protection and urban healthy development.Provide a scientific basis for improving the quality of the ecological environment.In this paper,Taihu County is the research area,and the remote sensing images in 1996,2002,2008,2014 and 2020 are used as the main data source,and the images are processed by software such as ENVI and GIS to obtain the current status of land use in the fifth phase of Taihu County.On this basis,the dynamic change of land use,the transition matrix and the degree of land use（LUI）were analyzed.Secondly,the new remote sensing ecological index（RSEI）was used to comprehensively evaluate the spatial characteristics of the ecological environment quality of Taihu County during the study years.Finally,SPSS software was used to quantitatively analyze the correlation between land use transfer patterns and changes in ecological environment quality,and based on Open Geo Da software,the spatial coupling relationship between land use degree and ecological environment quality was discussed by using the bivariate spatial autocorrelation and coordination model.Countermeasures and suggestions for land use and ecological environment quality.The research results are as follows:（1）The land use pattern in Taihu County changed significantly from 1996 to 2020,mainly showing a trend of "three increases,one decrease and one unchanged".main features.The degree of land use shows a spatial layout of "strong in the south and weak in the north",but with the development and expansion of cities and towns,the degree of land use has increased overall.（2）In the past 24 years,the quality of the ecological environment in Taihu County has shown a trend of first decline and then increase,and the average RSEI has increased by about 13%.Among the four indicators,greenness and dryness play a larger role in the ecological environment quality level of Taihu County.The change of forest land contributes the most to the deterioration of the ecological environment,while the improvement of the ecological environment quality is the most affected by cultivated land.（3）The spatial distribution of ecological environment quality and its changes are spatially consistent with the distribution changes of land use types;the increase of construction land has promoted the deterioration of ecological environment quality to a certain extent,but the changes in the area and structure of forest land and cultivated land The impact on the quality of the ecological environment is more significant.A certain degree of increase in the area of forest land or cultivated land will lead to an equal increase in the area of improved ecological environment.On the contrary,the increase in the area of degraded forest land will also lead to a relative increase in the area of ecological environment deterioration.（4）Spatial coupling relationship between land use change and ecological environment quality in Taihu County.Both the land use degree and the bivariate Moran’s I of the remote sensing ecological index have negative values and show a downward trend,which indicates that there is a significant negative correlation between the two.Decline.The aggregation of HH and LL gradually increased,and the layout of the HH area continued to be concentrated,and the contiguous trend was obvious.During the whole research period,the coordination type showed a trend of rising first,then falling and then rising,and the newly added urban areas generally showed a change process of "improvement lag-improvement advance-coordination type".In the early stage of urban development,the impact of land use degree on ecological environment quality is lagging behind.In the later stage of urban development,the impact of the land use degree on the ecological environment quality is advanced.At the end of urban development,there is a coordinated growth type with a small increase.Finally,based on the above conclusions,some countermeasures and suggestions are put forward in response to the needs of how to rationally utilize land resources and improve the ecological environment while social and economic development.Taihu County,as a latedeveloping area with outstanding ecological background conditions,studies its land use change,ecological environment effect and spatial coupling relationship,which has certain practical guiding significance for regulating land use patterns and maintaining ecological background advantages in such areas.Figure [ 24 ] table [ 23 ] 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