Evolution of groundwater fluoride in land subsidence areas after groundwater cessation: A case study at Cangzhou

Objective The South-to-North Water Transfer Project (SNWTP) has improved water use in northern China and further reduced deep groundwater extraction in the North China Plain. However, its impact on the evolution of regional groundwater hydrochemistry is still unknown. Methods In this paper, Cangzhou...

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Published in地质科技通报 Vol. 42; no. 4; pp. 218 - 227
Main Authors Danyang Sun, Hexue Li, Qiang Liu, Junxia Li
Format Journal Article
LanguageChinese
English
Published Editorial Department of Bulletin of Geological Science and Technology 01.07.2023
Subjects
fluorine
groundwater
groundwater cessation
land subsidence
south-to-north water transfer
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Abstract Objective The South-to-North Water Transfer Project (SNWTP) has improved water use in northern China and further reduced deep groundwater extraction in the North China Plain. However, its impact on the evolution of regional groundwater hydrochemistry is still unknown. Methods In this paper, Cangzhou, which has experienced severe land subsidence due to groundwater overexploitation and has received water resources from the SNWTP since 2015, was selected as the study area to investigate the effects of the SNWTP on groundwater chemistry. In 2017 and 2021, groundwater samples from Ⅲ and Ⅳ confined aquifers were collected to determine the hydrochemical characteristics. Moreover, the average annual land subsidence of the regional layer was further evaluated by using SBAS-InSAR to identify the correlation between variations in land deformation and changes in groundwater chemistry. Results The results showed that in comparison with those before the SNWTP, the groundwater fluoride concentration was slightly decreased,
AbstractList Objective The South-to-North Water Transfer Project (SNWTP) has improved water use in northern China and further reduced deep groundwater extraction in the North China Plain. However, its impact on the evolution of regional groundwater hydrochemistry is still unknown. Methods In this paper, Cangzhou, which has experienced severe land subsidence due to groundwater overexploitation and has received water resources from the SNWTP since 2015, was selected as the study area to investigate the effects of the SNWTP on groundwater chemistry. In 2017 and 2021, groundwater samples from Ⅲ and Ⅳ confined aquifers were collected to determine the hydrochemical characteristics. Moreover, the average annual land subsidence of the regional layer was further evaluated by using SBAS-InSAR to identify the correlation between variations in land deformation and changes in groundwater chemistry. Results The results showed that in comparison with those before the SNWTP, the groundwater fluoride concentration was slightly decreased,
Author Danyang Sun
Junxia Li
Hexue Li
Qiang Liu
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  fullname: Danyang Sun
  organization: School of Environmental Studies, China University of Geosciences(Wuhan), Wuhan 430078, China
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  fullname: Hexue Li
  organization: The Fourth Hydrological Engineering Geology Brigade of Hebei Geological and Mining Bureau, Cangzhou Hebei 061000, China
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  fullname: Qiang Liu
  organization: The Fourth Hydrological Engineering Geology Brigade of Hebei Geological and Mining Bureau, Cangzhou Hebei 061000, China
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  fullname: Junxia Li
  organization: School of Environmental Studies, China University of Geosciences(Wuhan), Wuhan 430078, China
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Snippet Objective The South-to-North Water Transfer Project (SNWTP) has improved water use in northern China and further reduced deep groundwater extraction in the...
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SubjectTerms fluorine
groundwater
groundwater cessation
land subsidence
south-to-north water transfer
Title Evolution of groundwater fluoride in land subsidence areas after groundwater cessation: A case study at Cangzhou
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