Badain Jaran Desert groundwater recharge

Description

All the data was used to study groundwater sources in a desert in China. Muti-logging data contains temperature, conductivity logging results, and seepage velocity data. The simulated rainfall test includes the distribution of water content and TDS in the soil profile after simulated heavy precipitation. The isotope data contains hydrogen and oxygen isotope data of different water bodies in the desert and surrounding areas, which is used to determine the groundwater source in the desert. It also included the hydraulic connection test, which shows the water level monitoring of adjacent wells while pumping a single well.

Steps to reproduce

Forty-eight hours after the pumping test, the probe is used to measure the temperature and electrical conductivity of groundwater every meter. In artificial tracer logging, the generalized dilution law is used to determine the seepage velocity. We choose sodium chloride solution as the tracer and did not cause water pollution. A simulated rainfall infiltration test was conducted on the top of the mega-dune to prove whether heavy rainfall can recharge groundwater in dunes. Spray 100 liters of water evenly into the square and the sand layer profile was excavated 48 hours later. All water samples were sealed in polyethylene bottles and sent to the State Key Laboratory of Hydrology Water Resources and Hydraulic Engineering at Hohai University, Nanjing, China to analyze the δ2H and δ18O isotopes via MAT253.

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