Spatial-temporal Changes of Land Use/Cover and Its Impact on Evapotranspiration in Wuwei City

Abstract

In order to grasp the sustainable development path of economy and ecology in Wuwei, based on GlobeLand30 land use/cover data from 2000 to 2020, we analyzed the spatial and temporal characteristics of land use/cover changes in Wuwei through single land use dynamic attitude, comprehensive land use dynamic attitude and land use transfer matrix, and combined with meteorological data and evapotranspiration data, clarified the driving mechanism of land use/cover change and its impact on evapotranspiration. The results show that during the period 2000—2020, shrublands and woodlands in Wuwei City had the highest combined motility, indicating that both were less stable. The main land use transfer direction in Wuwei City during 2000—2020 showed the transfer of cropland to man-made surface, forest land to grassland, and bare land to cropland and man-made surface. The distribution of ET in Wuwei City has strong spatial differences, which is very consistent with the land use/cover and surface vegetation coverage in Wuwei City. Conclusion: Temperature and rainfall have relatively limited effects on land use/cover changes in Wuwei, and only have some effects on land use/cover types such as wetlands, water bodies and woodlands. The main driving forces of land use/cover changes in Wuwei are socio-economic factors, among which GDP, real estate investment and government policies have significant effects on land use/cover type changes. The change of ET in Wuwei City is affected by both climate change and land use/cover change, and from 2010 to 2020, land use/cover dominates.