Hydrochemistry and Isotope Hydrology for Groundwater Sustainability of the Coastal Multilayered Aquifer System (Zhanjiang, China)
Groundwater sustainability has become a critical issue for Zhanjiang (China) because of serious groundwater level drawdown induced by overexploitation of its coastal multilayered aquifer system. It is necessary to understand the origins, material sources, hydrochemical processes, and dynamics of the...
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Wiley
2017-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2017/7080346 |
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| author | Pengpeng Zhou Ming Li Yaodong Lu |
| author_facet | Pengpeng Zhou Ming Li Yaodong Lu |
| author_sort | Pengpeng Zhou |
| collection | DOAJ |
| description | Groundwater sustainability has become a critical issue for Zhanjiang (China) because of serious groundwater level drawdown induced by overexploitation of its coastal multilayered aquifer system. It is necessary to understand the origins, material sources, hydrochemical processes, and dynamics of the coastal groundwater in Zhanjiang to support its sustainable management. To this end, an integrated analysis of hydrochemical and isotopic data of 95 groundwater samples was conducted. Hydrochemical analysis shows that coastal groundwater is fresh; however, relatively high levels of Cl−, Mg2+, and total dissolved solid (TDS) imply slight seawater mixing with coastal unconfined groundwater. Stable isotopes (δ18O and δ2H) values reveal the recharge sources of groundwater in the multilayered aquifer system. The unconfined groundwater originates from local modern precipitation; the confined groundwater in mainland originates from modern precipitation in northwestern mountain area, and the confined groundwater in Donghai and Leizhou is sourced from rainfall recharge during an older period with a colder climate. Ionic relations demonstrate that silicate weathering, carbonate dissolutions, and cation exchange are the primary processes controlling the groundwater chemical composition. Declining trends of groundwater level and increasing trends of TDS of the confined groundwater in islands reveal the landward extending tendency of the freshwater-seawater mixing zone. |
| format | Article |
| id | doaj-art-41f9c13547764abea530502546883abe |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
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| series | Geofluids |
| spelling | doaj-art-41f9c13547764abea530502546883abe2025-02-03T06:01:24ZengWileyGeofluids1468-81151468-81232017-01-01201710.1155/2017/70803467080346Hydrochemistry and Isotope Hydrology for Groundwater Sustainability of the Coastal Multilayered Aquifer System (Zhanjiang, China)Pengpeng Zhou0Ming Li1Yaodong Lu2Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Science, No. 19 Beitucheng West Road, Chaoyang District, Beijing 100029, ChinaAppraisal Center for Environment and Engineering, Ministry of Environmental Protection, No. 28 Anwaibeiyuan Road, Chaoyang District, Beijing 100012, ChinaThe First Hydrogeological Team, Guangdong Geological Bureau, Kangning Road, Chikan District, Zhanjiang 524049, ChinaGroundwater sustainability has become a critical issue for Zhanjiang (China) because of serious groundwater level drawdown induced by overexploitation of its coastal multilayered aquifer system. It is necessary to understand the origins, material sources, hydrochemical processes, and dynamics of the coastal groundwater in Zhanjiang to support its sustainable management. To this end, an integrated analysis of hydrochemical and isotopic data of 95 groundwater samples was conducted. Hydrochemical analysis shows that coastal groundwater is fresh; however, relatively high levels of Cl−, Mg2+, and total dissolved solid (TDS) imply slight seawater mixing with coastal unconfined groundwater. Stable isotopes (δ18O and δ2H) values reveal the recharge sources of groundwater in the multilayered aquifer system. The unconfined groundwater originates from local modern precipitation; the confined groundwater in mainland originates from modern precipitation in northwestern mountain area, and the confined groundwater in Donghai and Leizhou is sourced from rainfall recharge during an older period with a colder climate. Ionic relations demonstrate that silicate weathering, carbonate dissolutions, and cation exchange are the primary processes controlling the groundwater chemical composition. Declining trends of groundwater level and increasing trends of TDS of the confined groundwater in islands reveal the landward extending tendency of the freshwater-seawater mixing zone.http://dx.doi.org/10.1155/2017/7080346 |
| spellingShingle | Pengpeng Zhou Ming Li Yaodong Lu Hydrochemistry and Isotope Hydrology for Groundwater Sustainability of the Coastal Multilayered Aquifer System (Zhanjiang, China) Geofluids |
| title | Hydrochemistry and Isotope Hydrology for Groundwater Sustainability of the Coastal Multilayered Aquifer System (Zhanjiang, China) |
| title_full | Hydrochemistry and Isotope Hydrology for Groundwater Sustainability of the Coastal Multilayered Aquifer System (Zhanjiang, China) |
| title_fullStr | Hydrochemistry and Isotope Hydrology for Groundwater Sustainability of the Coastal Multilayered Aquifer System (Zhanjiang, China) |
| title_full_unstemmed | Hydrochemistry and Isotope Hydrology for Groundwater Sustainability of the Coastal Multilayered Aquifer System (Zhanjiang, China) |
| title_short | Hydrochemistry and Isotope Hydrology for Groundwater Sustainability of the Coastal Multilayered Aquifer System (Zhanjiang, China) |
| title_sort | hydrochemistry and isotope hydrology for groundwater sustainability of the coastal multilayered aquifer system zhanjiang china |
| url | http://dx.doi.org/10.1155/2017/7080346 |
| work_keys_str_mv | AT pengpengzhou hydrochemistryandisotopehydrologyforgroundwatersustainabilityofthecoastalmultilayeredaquifersystemzhanjiangchina AT mingli hydrochemistryandisotopehydrologyforgroundwatersustainabilityofthecoastalmultilayeredaquifersystemzhanjiangchina AT yaodonglu hydrochemistryandisotopehydrologyforgroundwatersustainabilityofthecoastalmultilayeredaquifersystemzhanjiangchina |