Fig. 2: Reconstructed Quaternary isopach map and paleochannels of the subaqueous delta and measured salinity profiles of offshore boreholes in the Pearl River estuary (PRE) and adjacent continental shelf.
From: Offshore freshened groundwater in the Pearl River estuary and shelf as a significant water resource
a Reconstructed Quaternary isopach map and paleochannels based on offshore borehole logs and high-resolution marine single-channel and sub-bottom seismic profiles on the basis of previous studies28, 33, 36, 37. b Salinity profiles of offshore boreholes, BH5 and HK10 were drilled for sea sand exploration and only limited cores were sampled for porewater. Data were missing in some sections of other boreholes because of low recovery rates in these sections with coarse materials. The measured salinity profiles of other offshore boreholes in the PRE and adjacent continental shelf can be found in Fig. S2 in the supplementary materials.
