Characterization of Shallow Groundwater Circulation Based on Chemical Kinetics: A Case Study of Xiong’an New Area, China
Xiong’an New Area, located in the middle of the North China Plain, will have been built as a “city of the future.” Urban planning and construction need to comprehensively consider the constraints of hydrogeological conditions such as aquifer structure and parameters. As the main aquifer in this area...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/12/1880 |
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| author | Yubo Xia Haitao Li Bing Wang Zhen Ma Xu Guo Kai Zhao Changrong Zhao |
| author_facet | Yubo Xia Haitao Li Bing Wang Zhen Ma Xu Guo Kai Zhao Changrong Zhao |
| author_sort | Yubo Xia |
| collection | DOAJ |
| description | Xiong’an New Area, located in the middle of the North China Plain, will have been built as a “city of the future.” Urban planning and construction need to comprehensively consider the constraints of hydrogeological conditions such as aquifer structure and parameters. As the main aquifer in this area, the paleo-channel is heterogeneous and anisotropic, and the two-dimensional hydraulic conductivity in each horizontal direction cannot be obtained from aquifer tests. Therefore, this study adopts a chemical kinetics method to calculate the ionic activity and mineral saturation indices of shallow groundwater, determine the groundwater chemical potential field, and construct a horizontal two-dimensional groundwater chemical kinetics model. This model is used to calculate the hydraulic conductivity, flow rate and retention time of groundwater in areas of different chemical kinetics, as well as evaluate horizontal heterogeneity of the Quaternary paleo-channel aquifer. The results indicate that the groundwater chemical potential field can reflect the characteristics of the groundwater seepage field in each horizontal direction. The paleo-channel is the main channel of groundwater circulation, which shows the statistical difference of its permeability. Alluvial and lacustrine strata affect groundwater circulation due to their different hydrogeological structures and permeability. The groundwater chemical kinetics results of hydraulic conductivity along the paleo-channel are approximately consistent with traditional hydrogeological calculation results derived from aquifer test data. Hydraulic conductivity is higher in the extension direction of the paleo-channel, and lower if the path crosscuts multiple paleo-channels. This feature can be used to build a hydrogeological structure model combined with drilling data. Furthermore, excessive groundwater exploitation will change the actual flow rate and retention time of groundwater, thereby affecting the groundwater circulation conditions. This study of groundwater circulation in Xiong’an New Area by means of chemical kinetics makes up for the deficiency in the study of the unconsolidated sedimentary aquifer anisotropy within the paleo-channel. |
| first_indexed | 2024-03-09T22:12:52Z |
| format | Article |
| id | doaj.art-f1069aecfc55406cbff6de910b32a62f |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T22:12:52Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-f1069aecfc55406cbff6de910b32a62f2023-11-23T19:29:00ZengMDPI AGWater2073-44412022-06-011412188010.3390/w14121880Characterization of Shallow Groundwater Circulation Based on Chemical Kinetics: A Case Study of Xiong’an New Area, ChinaYubo Xia0Haitao Li1Bing Wang2Zhen Ma3Xu Guo4Kai Zhao5Changrong Zhao6Tianjin Center China Geological Survey (CGS), Tianjin 300170, ChinaChina Institute of Geo-Environment Monitoring, Beijing 100081, ChinaTianjin Geothermal Exploration and Development-Designing Institute, Tianjin 300250, ChinaTianjin Center China Geological Survey (CGS), Tianjin 300170, ChinaTianjin Center China Geological Survey (CGS), Tianjin 300170, ChinaChina Institute of Geo-Environment Monitoring, Beijing 100081, ChinaTianjin Center China Geological Survey (CGS), Tianjin 300170, ChinaXiong’an New Area, located in the middle of the North China Plain, will have been built as a “city of the future.” Urban planning and construction need to comprehensively consider the constraints of hydrogeological conditions such as aquifer structure and parameters. As the main aquifer in this area, the paleo-channel is heterogeneous and anisotropic, and the two-dimensional hydraulic conductivity in each horizontal direction cannot be obtained from aquifer tests. Therefore, this study adopts a chemical kinetics method to calculate the ionic activity and mineral saturation indices of shallow groundwater, determine the groundwater chemical potential field, and construct a horizontal two-dimensional groundwater chemical kinetics model. This model is used to calculate the hydraulic conductivity, flow rate and retention time of groundwater in areas of different chemical kinetics, as well as evaluate horizontal heterogeneity of the Quaternary paleo-channel aquifer. The results indicate that the groundwater chemical potential field can reflect the characteristics of the groundwater seepage field in each horizontal direction. The paleo-channel is the main channel of groundwater circulation, which shows the statistical difference of its permeability. Alluvial and lacustrine strata affect groundwater circulation due to their different hydrogeological structures and permeability. The groundwater chemical kinetics results of hydraulic conductivity along the paleo-channel are approximately consistent with traditional hydrogeological calculation results derived from aquifer test data. Hydraulic conductivity is higher in the extension direction of the paleo-channel, and lower if the path crosscuts multiple paleo-channels. This feature can be used to build a hydrogeological structure model combined with drilling data. Furthermore, excessive groundwater exploitation will change the actual flow rate and retention time of groundwater, thereby affecting the groundwater circulation conditions. This study of groundwater circulation in Xiong’an New Area by means of chemical kinetics makes up for the deficiency in the study of the unconsolidated sedimentary aquifer anisotropy within the paleo-channel.https://www.mdpi.com/2073-4441/14/12/1880chemical kineticsmineral saturation indexhydraulic conductivityheterogeneityXiong’an New Area |
| spellingShingle | Yubo Xia Haitao Li Bing Wang Zhen Ma Xu Guo Kai Zhao Changrong Zhao Characterization of Shallow Groundwater Circulation Based on Chemical Kinetics: A Case Study of Xiong’an New Area, China Water chemical kinetics mineral saturation index hydraulic conductivity heterogeneity Xiong’an New Area |
| title | Characterization of Shallow Groundwater Circulation Based on Chemical Kinetics: A Case Study of Xiong’an New Area, China |
| title_full | Characterization of Shallow Groundwater Circulation Based on Chemical Kinetics: A Case Study of Xiong’an New Area, China |
| title_fullStr | Characterization of Shallow Groundwater Circulation Based on Chemical Kinetics: A Case Study of Xiong’an New Area, China |
| title_full_unstemmed | Characterization of Shallow Groundwater Circulation Based on Chemical Kinetics: A Case Study of Xiong’an New Area, China |
| title_short | Characterization of Shallow Groundwater Circulation Based on Chemical Kinetics: A Case Study of Xiong’an New Area, China |
| title_sort | characterization of shallow groundwater circulation based on chemical kinetics a case study of xiong an new area china |
| topic | chemical kinetics mineral saturation index hydraulic conductivity heterogeneity Xiong’an New Area |
| url | https://www.mdpi.com/2073-4441/14/12/1880 |
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