Fig. 2

Slope change and channel morphological characteristics of each zone of Guertu River DFS. (A) DEM data map of the Guertu River DFS, featuring the regional locations of three phase zones and 1–7 observation stations. where the measurement line from the vertex to the end is denoted by Z-Z’; (B) The closest braided channel; (C) The central channel's eolian dunes; (D) The large-scale dunes and distal meander channels; (E) Variations in the average slope in various zone. Data source: National Aeronautics and Space Administration, NASA published global 30 m resolution ASTER GDEM data on its data website (earthdata.nasa.gov).