Analysis of Spatial-temporal Changes of Land Use in Jinchang in Recent 20 Years
In order to explore the spatio-temporal change characteristics of land use in Jinchang City,based on the five periods of land use data from 2000 to 2020,this paper analyzes the spatio-temporal change characteristics of land use types and the transfer status of land use types in Jinchang City in the past 20 years using ArcGIS system.The results show that main types of land use in Jinchang are mainly unused land,grassland and cultivated land,areas in each catalog are mainly unused land>grassland>cultivated land>construction land>forest land>water area.Grassland and woodland are mainly distributed in the southern and northern desert grassland areas,cultivated land is mainly distributed in the central plain area and the south of Shuangwan Township,and construction land is mainly distributed in the urban area of Ningyuanpu Township.The waters are scattered in the southern region.In the past 20 years,the area of cultivated land,construction land,unused land and water area has increased by 13 300,10 900,2 500 and 400 ha,respectively,while the area of forest land and grassland has decreased by 1 800 and 23 300 ha,respectively.The land use conversion is mainly concentrated in Xinchengzi Township,Dongzhai Township,Liuba Township,and the northern area of Jiaojiazhuang,mainly manifested as the conversion of grassland to unused land and cultivated land,cultivated land to unused land.The conversion rate of Huangcheng Township in the southwest is relatively low,and the conversion rate of Hongshagang and Shuangwan Township in the north is mainly unused land.Due to the climatic conditions and human activities,the transformation of land use types is active,mainly manifested as the mutual transformation between unused land and grassland.In the middle of the study area,the industrial development and human activities are strong,and the transformation of land use types shows a spot-like discontinuous distribution.
Land useSpatial-temporal changeTransfer matrixJinchang City
国家科技期刊平台
NSTL
万方数据
