Abstract: Based on the spatial data of land use in the lower reaches of the Tarim River from 2000 to 2020, land use transition maps, fluctuation maps and transition model maps in two time series were constructed by using the geological information map method to analyze the temporal and spatial characteristics of land use transformation after ecological water transportation in the lower reaches of the Tarim River. Results showed that ① From 2000 to 2020, the land use structure of the lower reaches of the Tarim River was dominated by woodland, grassland and unused land. Among them, the cultivated land and water area had increased significantly, and the grassland and unused land have decreased. ② The land use transformation map was mainly based on the mutual transformation of forest land, grassland and unused land and the increase of water area. In the two sequential units, there was no obvious difference in the types of the main graph units that had changed. ③ The area of ​​newly added grassland in the map of land use upswing was the largest; the area of ​​shrinking grassland in the map of land use decline was the largest. ④ In addition to the full-period stable type, the land-use transition model map was dominated by the previous and late-stage changes, while the repeated and full-period changes accounted for a relatively small proportion.

Key words: land use, geo-information map, map unit, Tarim River