Groundwater salinization under the influence of paleo sea-level fluctuation: a case study in southern Laizhou Bay, China
The groundwater environment in low-lying coastal regions is significantly impacted by global sea-level fluctuation. In Laizhou Bay, three large-scale transgressions have occurred since the late Pleistocene, resulting in the transformation of ancient seawater into brine. This brine has become a major...
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| Format: | Article |
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Frontiers Media S.A.
2024-01-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2023.1302064/full |
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| author | Zhen Cui Zhen Cui Guangquan Chen Shenliang Chen Hongjun Yu Keke Chen Baichuan Ran Tengfei Fu Wenzhe Lyu Yancheng Wang Xueyan Jiang Xihuang Zhong |
| author_facet | Zhen Cui Zhen Cui Guangquan Chen Shenliang Chen Hongjun Yu Keke Chen Baichuan Ran Tengfei Fu Wenzhe Lyu Yancheng Wang Xueyan Jiang Xihuang Zhong |
| author_sort | Zhen Cui |
| collection | DOAJ |
| description | The groundwater environment in low-lying coastal regions is significantly impacted by global sea-level fluctuation. In Laizhou Bay, three large-scale transgressions have occurred since the late Pleistocene, resulting in the transformation of ancient seawater into brine. This brine has become a major contributor to groundwater salinity in the area. This study establishes a correlation between groundwater occurrence and paleoclimate changes in Laizhou Bay using borehole sediment data. The source and mechanism of groundwater salinity are analyzed based on sediment pore water characteristics and hydrogen and oxygen isotopes. The study reveals that the stratigraphic structures in the area consist of four layers: a Holocene transgressive layer, a continental confining bed from the late Pleistocene, a Cangzhou transgressive layer from the late Pleistocene, and a fluvial aquifer from the middle Pleistocene. All aquifers in the study area have been infiltrated by modern seawater, with the uppermost Holocene aquifer influenced by evaporation and leaching processes, the central late Pleistocene aquifer remaining relatively stable, and the lower middle Pleistocene aquifer affected by subsurface low salinity runoff and exhibiting an increasing trend with depth. Given the presence of numerous hydrogeological environments globally that are similar to the study area, the obtained mechanisms of groundwater salinization in this study will provide theoretical support for groundwater management in similar regions worldwide. |
| first_indexed | 2024-03-08T16:06:57Z |
| format | Article |
| id | doaj.art-f5ea70c29e294ab697074e6ff029940a |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-03-08T16:06:57Z |
| publishDate | 2024-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-f5ea70c29e294ab697074e6ff029940a2024-01-08T05:24:25ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452024-01-011010.3389/fmars.2023.13020641302064Groundwater salinization under the influence of paleo sea-level fluctuation: a case study in southern Laizhou Bay, ChinaZhen Cui0Zhen Cui1Guangquan Chen2Shenliang Chen3Hongjun Yu4Keke Chen5Baichuan Ran6Tengfei Fu7Wenzhe Lyu8Yancheng Wang9Xueyan Jiang10Xihuang Zhong11State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, ChinaKey Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, ChinaKey Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, ChinaState Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, ChinaKey Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, ChinaNorth China Sea Ecological Center, Ministry of Natural Resources, Qingdao, ChinaState Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, ChinaKey Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, ChinaKey Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, ChinaKey Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, ChinaDepartment of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, ChinaDepartment of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, ChinaThe groundwater environment in low-lying coastal regions is significantly impacted by global sea-level fluctuation. In Laizhou Bay, three large-scale transgressions have occurred since the late Pleistocene, resulting in the transformation of ancient seawater into brine. This brine has become a major contributor to groundwater salinity in the area. This study establishes a correlation between groundwater occurrence and paleoclimate changes in Laizhou Bay using borehole sediment data. The source and mechanism of groundwater salinity are analyzed based on sediment pore water characteristics and hydrogen and oxygen isotopes. The study reveals that the stratigraphic structures in the area consist of four layers: a Holocene transgressive layer, a continental confining bed from the late Pleistocene, a Cangzhou transgressive layer from the late Pleistocene, and a fluvial aquifer from the middle Pleistocene. All aquifers in the study area have been infiltrated by modern seawater, with the uppermost Holocene aquifer influenced by evaporation and leaching processes, the central late Pleistocene aquifer remaining relatively stable, and the lower middle Pleistocene aquifer affected by subsurface low salinity runoff and exhibiting an increasing trend with depth. Given the presence of numerous hydrogeological environments globally that are similar to the study area, the obtained mechanisms of groundwater salinization in this study will provide theoretical support for groundwater management in similar regions worldwide.https://www.frontiersin.org/articles/10.3389/fmars.2023.1302064/fullgroundwater salinization mechanismsporewater analysishydrochemical characteristicsstable isotope characteristicssouthern coast of Laizhou Bayglobal sea level fluctuation |
| spellingShingle | Zhen Cui Zhen Cui Guangquan Chen Shenliang Chen Hongjun Yu Keke Chen Baichuan Ran Tengfei Fu Wenzhe Lyu Yancheng Wang Xueyan Jiang Xihuang Zhong Groundwater salinization under the influence of paleo sea-level fluctuation: a case study in southern Laizhou Bay, China Frontiers in Marine Science groundwater salinization mechanisms porewater analysis hydrochemical characteristics stable isotope characteristics southern coast of Laizhou Bay global sea level fluctuation |
| title | Groundwater salinization under the influence of paleo sea-level fluctuation: a case study in southern Laizhou Bay, China |
| title_full | Groundwater salinization under the influence of paleo sea-level fluctuation: a case study in southern Laizhou Bay, China |
| title_fullStr | Groundwater salinization under the influence of paleo sea-level fluctuation: a case study in southern Laizhou Bay, China |
| title_full_unstemmed | Groundwater salinization under the influence of paleo sea-level fluctuation: a case study in southern Laizhou Bay, China |
| title_short | Groundwater salinization under the influence of paleo sea-level fluctuation: a case study in southern Laizhou Bay, China |
| title_sort | groundwater salinization under the influence of paleo sea level fluctuation a case study in southern laizhou bay china |
| topic | groundwater salinization mechanisms porewater analysis hydrochemical characteristics stable isotope characteristics southern coast of Laizhou Bay global sea level fluctuation |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2023.1302064/full |
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