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Evolution of groundwater system in the Pearl River Delta and its adjacent shelf since the late Pleistocene
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| Created: | Nov 22, 2023 at 8:27 a.m. | |
| Last updated: | Apr 02, 2024 at 1:03 p.m. | |
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| Sharing Status: | Private (Accessible via direct link sharing) |
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Abstract
The supplementary materials are the measured geochemical raw data of onshore and offshore groundwater associated with the paper entitled "Evolution of groundwater system in the Pearl River Delta and its adjacent shelf since the late Pleistocene".
Our extensive field studies demonstrate that saline groundwater inland and freshened groundwater offshore coexist in the same aquifer system in the Pearl River delta and its adjacent shelf. This counter-intuitive phenomenon challenges the commonly held assumption that onshore groundwater is typically fresh, while offshore groundwater is saline. To address this knowledge gap, we conduct a series of sophisticated paleo-hydrogeological models to explore the formation mechanism and evolution process of the groundwater system in the inland-shelf systems. Our findings indicate that shelf-freshened groundwater has formed during the low-stands since the late Pleistocene, while onshore saline groundwater is generated by paleo-seawater intrusion during the Holocene transgression. It reveals that terrestrial and offshore groundwater systems have undergone alternating changes on a geological timescale. The groundwater system exhibits hysteresis responding to paleoclimate changes, with a lag of 7-8 kyr, suggesting that paleoclimatic forcings exert a significantly residual influence on the present-day groundwater system.
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| Name | Organization | Address | Phone | Author Identifiers |
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| Chong Sheng | University of Hong Kong | Hong Kong, HK |
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This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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