Research On The Landscape Pattern And Optimization Strategy Of Green Space In Zhengdong New District

With the continuous urbanization process,the green space landscape pattern of Zhengdong New District has undergone significant changes due to the ecological damage caused by the socio-economic growth and the hindered development of its characteristic space.By analyzing the green space changes in Zhengdong New District after its actual completion,dissecting its evolution process,proposing a green space optimization model,and constructing a green space ecological network to simulate and predict its future growth,it is of great significance to improve the green space condition in Zhengdong New District and the sustainable development of Zhengzhou,as well as providing an important theoretical framework for the development of Zhengzhou green space planning.Based on this,this study takes Zhengdong New District as the object,selects four important nodes,2007,2011,2015 and 2019,and interprets its remote sensing images(Landsat images),firstly explores the background spatial evolution of Zhengdong New District through the land use transfer model construction method,extracts the green spatial area conversion analysis information of the study area,and analyzes its transformation influence factors;secondly,analyzes the overall spatial evolution of the green spatial landscape pattern index of Zhengdong New District through Fragstats 4.2 software.Secondly,the green space landscape pattern index change characteristics of Zhengdong New Area were analyzed by Fragstats 4.2 software,and the 500 m X500m cell grid was used to calculate the overall spatial evolution change of the landscape pattern of Zhengdong New Area;finally,based on the 2019 Landsat remote sensing images of Zhengdong New Area,the MSPA and landscape index methods were used to identify the patches with strong connectivity in the core area as ecological source sites,construct ecological networks using the MCR model,and conduct quantitative evaluation to reasonably construct ecological networks in Zhengdong New District,in conclusion,the study shows that.(1)The internal landscape layout of green areas in Zhengdong New District has evolved over time.The morphology and dynamics of cultivated land,forest land,grassland,and water bodies vary in degree.In addition,the area of land for construction and development grows,the area of arable land tends to decrease,the total area of woodland grows,the area of grassland and water bodies changes up and down,and the total amount of green space decreases;the conversion of land types is mainly based on the conversion of arable land to construction land,woodland and grassland,and the study shows that: the green space in Zhengdong New District is influenced by social,economic and natural factors,and various factors interact with each other,and the evolution of green space area is influenced by The evolution of green space area is strongly influenced by socio-economic growth and is obviously stronger than natural and administrative factors.(2)The evolutionary trends of the green space ecosystem in Zhengdong New District during the study period are diverse.The overall transformation of green space shows fragmentation and heterogeneity.Cultivated land is gradually fragmented,the composition of water bodies continues to be simplistic,woodland and grassland patches are gradually contiguous and dispersed,forest and grassland patches are gradually contiguous and minimally fragmented,and the connectivity index gradually increases.In terms of evolving space,fragmentation tends to spread gradually from the main construction areas of Zhengdong New District(Longhu Group and Longzi Lake Group)to the Jinshui Science and Education Park Group,the urban agriculture group along the Yellow River,the Baisha Group,and the comprehensive transportation hub group.(3)Ecological corridor network can optimize the green spatial pattern of Zhengdong New District.Four factors of slope,elevation,land use classification and vegetation normalization index are selected for superposition to form a comprehensive resistance surface for constructing ecological network in Zhengdong New District.10 core areas with the highest dpc values are selected as ecological source points,45 ecological corridors are found by using MCR model,11 important corridors and 20 general corridors are found by using gravity model.According to the current situation of green space in Zhengdong New District,it is suggested to plan 3 important corridors,6 ecological source sites,9 ecological corridors and identify 16 important ecological nodes,which are mainly distributed in the east and west and south areas,so as to form a new ecological network pattern of "one horizontal,two vertical and four connections" in Zhengdong New District and solve the contradiction of uneven distribution of important corridors,and at the same time make the whole ecological network achieve multiple coverage.The whole ecological network has achieved multi-coverage,and the landscape pattern index has been significantly improved.The new ecological network in Zhengdong New District is designed to solve the contradiction of uneven distribution of important corridors,improve the regional landscape pattern,and achieve the high-quality development demand of Zhengdong New District.