Estimating submarine groundwater discharges of the Bohai Sea, China using radium, hydrogen and oxygen isotopes and salinity
- 1School of Environmental Science and Engineering, Southern University of Science and Technology
- 2School of Water Resources and Environment, China University of Geosciences-Beijing
- 3Department of Earth Sciences, the University of Hong Kong, Hong Kong, China
With an area of about 77,000 km2, the Bohai Sea includes three bays: Laizhou Bay, Bohai Bay and Liaodong Bay. In this study, 228Ra, δD, δ18O and salinity data were collected from surface seawater in the entire Bohai Sea, river water, and groundwater along its coastline in August 2017. Based on the spatial distributions of δD, δ18O, and salinity in surface water in the entire Bohai Sea and δD-salinity relations, the marine hydrological processes were investigated and the members of river water and groundwater for δD and δ18O were determined. The steady-state mass-balance models of δD, δ18O and salinity are given and used to estimate submarine fresh groundwater discharges and the flushing times of the entire Bohai Sea and its three bays. Based on the results of the flushing times, the steady-state mass-balance model of 228Ra is used to estimate submarine groundwater discharges of the entire Bohai Sea and its three bays.
How to cite: Li, H., Zhang, X., Wang, X., Xiao, K., Zhang, Y., and Jiao, J. J.: Estimating submarine groundwater discharges of the Bohai Sea, China using radium, hydrogen and oxygen isotopes and salinity, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-6644, https://doi.org/10.5194/egusphere-egu2020-6644, 2020
