腾格里沙漠南缘脆弱区土地利用变化及其生态环境效应

[Objective]As a key area in response to environmental change and human disturbance,desert fringe is one of the key areas in the study of land use change and environmental effects.[Method]Based on remote sensing images from 2000,2011,and 2020,this study quantitatively analyzed the land use change pattern and ecological environment quality of Shapotou District,using ERDAS,ENVI,ArcGIS,and other Geographic information and remote sensing software.[Result]Unused land and cultivated land in Shapotou District shrunk,while woodland,grassland and construction land continued to increase from 2000 to 2020.Land use change was frequent between woodland,grassland,cultivated land,and unused land,and most of them were distributed in the mid-northeast of the area.The index of land use structure showed that the orderliness and stability of the land use system in Shapotou District increased,especially in large disturbed areas,and its stability was stronger than that in weakly disturbed areas.[Conclusion]Improvement of the ecological environment quality exhibited in most regions of Shapotou District.The protective policy,such as:returning farmland to forestry and grassland engineering,sand control and desertification control engineering,which transform large areas of unused land to woodland and grassland,improved the local ecological environment quality.