Hydrological cycle and water balance estimates for the megadune–lake region of the Badain Jaran Desert, China

A study of the Badain Jaran Desert in China reveals that megadunes and lakes maintain a dynamic hydrological balance despite arid conditions. The research identifies preferential flow within sand layers, driven by alternating coarse and fine sand, which facilitates deep water penetration and groundwater recharge. This process sustains lake water levels, with annual water storage in megadunes (7.5 mm) sufficient to offset evaporation losses. Precipitation events exceeding 15 mm, sparse vegetation, and high permeability of dune materials are critical for this balance. The findings highlight the significance of precipitation in arid desert hydrological cycles.

Ma, Y.-D., Zhao, J.-B., Luo, X.-Q., Shao, T.-J., Dong, Z.-B., & Zhou, Q. (2017). Hydrological cycle and water balance estimates for the megadune–lake region of the Badain Jaran Desert, China. Hydrological Processes, 31(18), 3255–3268. Portico. https://doi.org/10.1002/hyp.11256