Research On The Current Situation And Development Countermeasures Of The Green Infrastructure In Zhengzhou City Center Based On Information Technology

The rapid development and construction of cities has not only improved the rapid growth of urban economic benefits,but also led to aggravated destruction of the ecological environment,which in turn led to fragmentation of the ecological network,or even a retrograde reduction,reduction of the core habitat area,and serious damage to the ecological service function of the landscape.The truncation of ecological corridors has led to the reduction of biological migration channels and affected the development of biodiversity.On the whole,the process of urbanization has seriously affected the health and integrity of the ecosystem.Research on the generation,development and application of green infrastructure can effectively build urban and rural ecological network systems at different scales [1],improve the ecological environment,and effectively play the multi-functionality of the landscape,thereby promoting the construction and sustainable development of urban and rural ecological civilization.In this study,Zhengzhou’s downtown area was used as the research area.Through the supervision and classification of TM/ETM remote sensing image data in 2007,2011,2015 and 2019,the land use type maps of the four periods in the study area were obtained,and the morphological space was adopted.Pattern analysis(MSPA)method and landscape connectivity analysis to identify the core area and ecological source area,and then based on the least cumulative resistance model and gravity model,use Arc Gis 10.2 to analyze the cost path and cost distance,and form potential ecological corridors.Construct a green infrastructure network in the downtown area of Zhengzhou.The main research conclusions are as follows:(1)Obtain the changes in the landscape pattern of the downtown area of Zhengzhou.Through the analysis and processing of remote sensing images,the land use type map and the green infrastructure landscape type map of the downtown area of Zhengzhou were obtained in 4 periods,and then the temporal and spatial pattern changes were quantitatively analyzed,and the land in different periods of Zhengzhou was obtained.Types and temporal and spatial changes of various green infrastructure elements.It can be concluded that the construction land in the urban area of Zhengzhou has expanded rapidly,the overall landscape pattern has become more fragmented,and individual areas have shown a good trend of fragment integration.(2)Identify the ecological source of Zhengzhou city center.Using the landscape connectivity index to classify and quantitatively evaluate the core areas based on the analysis of the landscape connectivity between the core areas,the core areas with larger areas and higher connectivity indexes are designated as ecological sources,and a total of them are determined.11 ecological sources.Thus,it is possible to refer to the construction of ecological source areas and different core areas in a targeted manner.(3)Extraction and analysis of potential ecological corridors based on the least cumulative resistance model.A total of 55 potential ecological corridors are obtained through analysis,and the interaction force of the potential ecological corridors between the ecological sources is analyzed through the gravity model,so as to classify the ecological corridors.It can be seen that the connection between the east and west of Zhengzhou city center is relatively good,while the degree of connection between the north and the south is relatively weak,and the overall distribution of corridors is uneven.Through the analysis of potential ecological corridors,ecological stepping stones are set up for the ecological corridors with relatively long distances between the source areas and small interaction force,and the ecological stepping stones are graded,thereby improving the overall green Integrity and connectivity of the infrastructure network.Finally,through the optimization strategy analysis of the network structure,the network space structure of the green infrastructure in the downtown area of Zhengzhou,which is composed of 11 ecological sources,55 ecological corridors,and 14 ecological stepping stones,is obtained.The combination of MSPA and landscape connectivity analysis is used to analyze the temporal and spatial pattern of green infrastructure and the core area classification.The minimum cumulative resistance model and the gravity model are combined to generate and classify potential ecological corridors.The combination of these research methods is the green foundation The analysis of facility layout changes provides a new research framework.The research results can provide reference for the planning and optimization of the green infrastructure network of Zhengzhou.As a central city,Zhengzhou City will study the changes and construction of its green infrastructure,so that Zhengzhou will become a leader in the development and construction of green infrastructure,and then drive the development of other cities.The construction of green infrastructure,thus forming a green ecological network of the Central Plains urban agglomeration,plays an important role and is of great significance to the construction of a central city.