Hydrochemical analysis and pollution assessment of the Anjiang underground river system in central Guizhou
Objective This study aims to establish a scientific framework for managing pollution in the Anjiang underground river system in central Guizhou and maintaining the ecological integrity of the Wujiang River basin. Methods The approach involves comprehensive hydrogeological surveys and analytical test...
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Editorial Department of Bulletin of Geological Science and Technology
2024-11-01
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| Series: | 地质科技通报 |
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| Online Access: | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.tb20240075 |
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| author | Cui ZHAO Hongliang QIN Yuhua ZHU Lin LUO Miaoling HE Zhonghua LI |
| author_facet | Cui ZHAO Hongliang QIN Yuhua ZHU Lin LUO Miaoling HE Zhonghua LI |
| author_sort | Cui ZHAO |
| collection | DOAJ |
| description | Objective This study aims to establish a scientific framework for managing pollution in the Anjiang underground river system in central Guizhou and maintaining the ecological integrity of the Wujiang River basin. Methods The approach involves comprehensive hydrogeological surveys and analytical testing of water samples. We analyze hydrogeological conditions, apply the Shukarev classification system, utilize Piper's trilinear diagrams, conduct normality and Grubbs' tests, and calculate pollution indices. This investigation methodically examines the hydrogeological context, hydrochemical profiles, sources of major ions, background concentrations, and current pollution levels, and identifies the factors driving pollution in the Anjiang underground river system. Results The Anjiang underground river system covers approximately 18.91 square kilometers. The hydrochemical composition is classified into four types: HCO3·SO4-Ca, HCO3-Ca·Mg, HCO3·SO4-Ca·Mg, and SO4-Ca, each constituting roughly equal proportions. The predominant ions mainly originate from the dissolution of carbonate rocks, specifically dolomite from the Loushanguan Formation and limestone from the Qixia Formation-Maokou Formation, as well as sulfur-bearing minerals from the Longtan Formation. The pollution levels are significant, with total phosphorus, fluoride, and sulfate being the most crucial contaminants. Notably, the limestone aquifer of the Qixia Formation-Maokou Formation has higher pollution level than the dolomite aquifer of the Loushanguan Formation. This study confirms that the karst conduit network in the Anjiang underground river system has developed primarily within the Qixia Formation-Maokou Formation, with substantial secondary development in the Loushanguan Formation. The groundwater, enriched with inorganic pollutants such as total phosphorus, fluoride, and sulfate ions, flows northeast through karst conduits, contaminating the Anjiang underground river system. This polluted water eventually discharges into the Wujiang River via the S50 underground river outlet. Conclusion Our findings provide crucial theoretical support for the management and mitigation of pollution in karstic underground river systems. |
| format | Article |
| id | doaj-art-7844cc87b93f422aa9e88ebd267f5ffe |
| institution | OA Journals |
| issn | 2096-8523 |
| language | zho |
| publishDate | 2024-11-01 |
| publisher | Editorial Department of Bulletin of Geological Science and Technology |
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| series | 地质科技通报 |
| spelling | doaj-art-7844cc87b93f422aa9e88ebd267f5ffe2025-08-20T01:56:31ZzhoEditorial Department of Bulletin of Geological Science and Technology地质科技通报2096-85232024-11-0143628129110.19509/j.cnki.dzkq.tb20240075dzkjtb-43-6-281Hydrochemical analysis and pollution assessment of the Anjiang underground river system in central GuizhouCui ZHAO0Hongliang QIN1Yuhua ZHU2Lin LUO3Miaoling HE4Zhonghua LI5111 Geological Party, Guizhou Bureau of Geology and Mineral Exploration & Development, Guiyang 550081, ChinaGuizhou Geological Survey, Guiyang 550081, ChinaGuizhou Geological Survey, Guiyang 550081, China111 Geological Party, Guizhou Bureau of Geology and Mineral Exploration & Development, Guiyang 550081, ChinaGuizhou Geological Survey, Guiyang 550081, ChinaGuizhou Geological Engineering Investigation Design and Research Institute, Guiyang 550081, ChinaObjective This study aims to establish a scientific framework for managing pollution in the Anjiang underground river system in central Guizhou and maintaining the ecological integrity of the Wujiang River basin. Methods The approach involves comprehensive hydrogeological surveys and analytical testing of water samples. We analyze hydrogeological conditions, apply the Shukarev classification system, utilize Piper's trilinear diagrams, conduct normality and Grubbs' tests, and calculate pollution indices. This investigation methodically examines the hydrogeological context, hydrochemical profiles, sources of major ions, background concentrations, and current pollution levels, and identifies the factors driving pollution in the Anjiang underground river system. Results The Anjiang underground river system covers approximately 18.91 square kilometers. The hydrochemical composition is classified into four types: HCO3·SO4-Ca, HCO3-Ca·Mg, HCO3·SO4-Ca·Mg, and SO4-Ca, each constituting roughly equal proportions. The predominant ions mainly originate from the dissolution of carbonate rocks, specifically dolomite from the Loushanguan Formation and limestone from the Qixia Formation-Maokou Formation, as well as sulfur-bearing minerals from the Longtan Formation. The pollution levels are significant, with total phosphorus, fluoride, and sulfate being the most crucial contaminants. Notably, the limestone aquifer of the Qixia Formation-Maokou Formation has higher pollution level than the dolomite aquifer of the Loushanguan Formation. This study confirms that the karst conduit network in the Anjiang underground river system has developed primarily within the Qixia Formation-Maokou Formation, with substantial secondary development in the Loushanguan Formation. The groundwater, enriched with inorganic pollutants such as total phosphorus, fluoride, and sulfate ions, flows northeast through karst conduits, contaminating the Anjiang underground river system. This polluted water eventually discharges into the Wujiang River via the S50 underground river outlet. Conclusion Our findings provide crucial theoretical support for the management and mitigation of pollution in karstic underground river systems.https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.tb20240075karst areaunderground river systemsystem boundaryhydrochemistrypollution characteristicscentral guizhou |
| spellingShingle | Cui ZHAO Hongliang QIN Yuhua ZHU Lin LUO Miaoling HE Zhonghua LI Hydrochemical analysis and pollution assessment of the Anjiang underground river system in central Guizhou 地质科技通报 karst area underground river system system boundary hydrochemistry pollution characteristics central guizhou |
| title | Hydrochemical analysis and pollution assessment of the Anjiang underground river system in central Guizhou |
| title_full | Hydrochemical analysis and pollution assessment of the Anjiang underground river system in central Guizhou |
| title_fullStr | Hydrochemical analysis and pollution assessment of the Anjiang underground river system in central Guizhou |
| title_full_unstemmed | Hydrochemical analysis and pollution assessment of the Anjiang underground river system in central Guizhou |
| title_short | Hydrochemical analysis and pollution assessment of the Anjiang underground river system in central Guizhou |
| title_sort | hydrochemical analysis and pollution assessment of the anjiang underground river system in central guizhou |
| topic | karst area underground river system system boundary hydrochemistry pollution characteristics central guizhou |
| url | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.tb20240075 |
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