图3. 纳米布沙漠沙丘类型与风向变率(RDP/DP)及沉积物等效厚度 (EST)的关系(据参考文献[13]修改)
Fig.3. Relationship between dune forms, wind directional variability (RDP/DP), and Equivalent Sand Thickness (EST) in the Namib dune fields (modified after reference [13])