Analysis of Spatial-Temporal Changes of Land Use in Zhenjiang City, Jiangsu Province, from 2000 to 2020 Using GIS

With the rapid growth of the economy and the acceleration of urbanization, the scarcity of land resources has become increasingly prominent, and changes in land use types have become a hot research topic. This study takes Zhenjiang City in Jiangsu Province as an example, using land use data from 2000, 2010, and 2020, and combining ArcGIS with three methods: land use transfer matrix, dynamic degree, and standard deviation ellipse, to analyze the spatiotemporal changes and transfer amounts of land use types in the past two decades. The results indicate that firstly, the land use types in Zhenjiang are cropland, construction land, forests, and water bodies, with the specific area being cropland>construction land>forests>water bodies>wetlands>grasslands. Secondly, forests are distributed in the southwest and northwest of Zhenjiang; wetlands are distributed in the north; water bodies are distributed in the north and central western regions; and construction land is distributed in the north and central regions. Thirdly, in the past two decades, the single land use dynamic degree of construction land has been the highest, at 17.27%, indicating the largest change in area and rapid urban extension in Zhenjiang. The center of gravity of construction land has undergone significant changes, showing a shift from northeast to southwest.