Origins of Groundwater Inferred from Isotopic Patterns of the Badain Jaran Desert, Northwestern China

Groundwater in the Badain Jaran Desert (BJD) originates from ancient climatic conditions with higher humidity and lower temperatures, distinct from modern precipitation. Isotopic analysis of δ D, δ 18 O, and d-excess reveals strong evaporation effects and no hydraulic connection to distant regions except Outer Mongolia. The study found that BJD groundwater has abnormally negative d-excess values (-17.5‰), differing significantly from local precipitation (5.7‰) and nearby water bodies, indicating limited modern recharge. Research involved comparing isotopic patterns across the BJD, Heihe River Basin, and surrounding areas to reconstruct past climatic conditions.

Zhao, L., Xiao, H., Dong, Z., Xiao, S., Zhou, M., Cheng, G., Yin, L., & Yin, Z. (2011). Origins of Groundwater Inferred from Isotopic Patterns of the Badain Jaran Desert, Northwestern China. Groundwater, 50(5), 715–725. Portico. https://doi.org/10.1111/j.1745-6584.2011.00895.x