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Article: Evolution of groundwater system in the Pearl River Delta and its adjacent shelf since the late Pleistocene

TitleEvolution of groundwater system in the Pearl River Delta and its adjacent shelf since the late Pleistocene
Authors
Issue Date12-Apr-2024
PublisherAmerican Association for the Advancement of Science
Citation
Science Advances, 2024, v. 10, n. 15 How to Cite?
AbstractOur 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 counterintuitive 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 lowstands since late Pleistocene, while onshore saline groundwater is generated by paleo-seawater intrusion during the Holocene transgression. This 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 to 8 thousand years, suggesting that paleoclimatic forcings exert a significantly residual influence on the present-day groundwater system.
Persistent Identifierhttp://hdl.handle.net/10722/350437

 

DC FieldValueLanguage
dc.contributor.authorSheng, Chong-
dc.contributor.authorJiao, Jiu Jimmy-
dc.contributor.authorZhang, Jinpeng-
dc.contributor.authorYao, Yantao-
dc.contributor.authorLuo, Xin-
dc.contributor.authorYu, Shengchao-
dc.contributor.authorNi, Yugen-
dc.contributor.authorWang, Shidong-
dc.contributor.authorMao, Rong-
dc.contributor.authorYang, Tao-
dc.contributor.authorZhan, Linsen-
dc.date.accessioned2024-10-29T00:31:34Z-
dc.date.available2024-10-29T00:31:34Z-
dc.date.issued2024-04-12-
dc.identifier.citationScience Advances, 2024, v. 10, n. 15-
dc.identifier.urihttp://hdl.handle.net/10722/350437-
dc.description.abstractOur 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 counterintuitive 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 lowstands since late Pleistocene, while onshore saline groundwater is generated by paleo-seawater intrusion during the Holocene transgression. This 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 to 8 thousand years, suggesting that paleoclimatic forcings exert a significantly residual influence on the present-day groundwater system.-
dc.languageeng-
dc.publisherAmerican Association for the Advancement of Science-
dc.relation.ispartofScience Advances-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleEvolution of groundwater system in the Pearl River Delta and its adjacent shelf since the late Pleistocene-
dc.typeArticle-
dc.identifier.doi10.1126/sciadv.adn3924-
dc.identifier.pmid38598633-
dc.identifier.scopuseid_2-s2.0-85190453989-
dc.identifier.volume10-
dc.identifier.issue15-
dc.identifier.eissn2375-2548-
dc.identifier.issnl2375-2548-

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