Impacts of sediment compaction on iodine enrichment in deep aquifers of the North China Plain

Xue, Xiaobin; Li, Junxia; Qian, Kun; Wang, Yanxin

doi:10.1016/j.watres.2019.05.036

Cited by 36 publications

(25 citation statements)

References 53 publications

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“…The hydrogeological cross section A-A' from Shijiazhuang to Bohai Bay is illustrated in Figure 1b. The quaternary aquifers underlying the NCP are divided into four groups (Table 1): aquifer 1 is an unconfined aquifer at depths of 10-50 m, and aquifer 2 is a shallow confined aquifer at depths of 120 to 210 m, whereas aquifer 3 (depths of 250-310 m) and aquifer 4 (depths of 350-550 m) are confined and defined as deep groundwater [34][35][36]. Hereafter, the shallow aquifer refers collectively to aquifers 1 and 2.…”

Section: Study Areamentioning

confidence: 99%

Recent Ground Subsidence in the North China Plain, China, Revealed by Sentinel-1A Datasets

et al. 2020

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Groundwater resources have been exploited and utilized on a large scale in the North China Plain (NCP) since the 1970s. As a result of extensive groundwater depletion, the NCP has experienced significant land subsidence, which threatens geological stability and infrastructure health and exacerbates the risks of other geohazards. In this study, we employed multi-track Synthetic Aperture Radar (SAR) datasets acquired by the Sentinel-1A (S1A) satellite to detect spatial and temporal distributions of surface deformation in the NCP from 2016 to 2018 based on multi-temporal interferometric synthetic aperture radar (MT-InSAR). The results show that the overall ground displacement ranged from −165.4 mm/yr (subsidence) to 9.9 mm/yr (uplift) with a standard variance of 28.8 mm/yr. During the InSAR monitoring period, the temporal pattern of land subsidence was dominated by a decreasing tendency and the spatial pattern of land subsidence in the coastal plain exhibited an expansion trend. Validation results show that the S1A datasets agree well with levelling data, indicating the reliability of the InSAR results. With groundwater level data, we found that the distribution of subsidence in the NCP is spatially consistent with that of deep groundwater depression cones. A comparison with land use data shows that the agricultural usage of groundwater is the dominant mechanism responsible for land subsidence in the whole study area. Through an integrated analysis of land subsidence distribution characteristics, geological data, and previous research results, we found that other triggering factors, such as active faults, precipitation recharge, urbanization, and oil/gas extraction, have also impacted land subsidence in the NCP to different degrees.

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Section: Study Areamentioning

confidence: 99%

Recent Ground Subsidence in the North China Plain, China, Revealed by Sentinel-1A Datasets

et al. 2020

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“…Before 1950s, land subsidence occurred in some areas of the BTH region, and the amount of land subsidence was relatively weak. However, the groundwater of BTH has been used as a major source of water since 1970; thus, the groundwater level has dropped rapidly due to the excessive exploitation [40]. Due to the complex influencing factors of land subsidence, the exploitation and utilization of groundwater vary from place to place, and the development rate and influence range of land subsidence have significant differences in different spaces and times.…”

Section: Study Areamentioning

confidence: 99%

Combined GRACE and MT-InSAR to Assess the Relationship between Groundwater Storage Change and Land Subsidence in the Beijing-Tianjin-Hebei Region

Gong

Chen

et al. 2021

Remote Sensing

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Beijing-Tianjin-Hebei (BTH) has been suffering from severe groundwater storage (GWS) consumption and land subsidence (LS) for a long period. The overexploitation of groundwater brings about severe land subsidence, which affects the safety and development of BTH. In this paper, we utilized multi-frame synthetic aperture radar datasets obtained by the Rardarsat-2 satellite to monitor land subsidence’s temporal and spatial distribution in the BTH from 2012 to 2016 based on multi-temporal interferometric synthetic aperture radar (MT-InSAR). In addition, we also employed the Gravity Recovery and Climate Experiment (GRACE) mascon datasets acquired by the Center for Space Research (CSR) and Jet Propulsion Laboratory (JPL) to obtain the GWS anomalies (GWSA) of BTH from 2003 to 2016. Then we evaluate the accuracy of the results obtained. Furthermore, we explored the relationship between the regional GWSA and the average cumulative subsidence in the BTH. The total volume change of subsidence is 59.46% of the total volume change of groundwater storage. Moreover, the long-term decreasing trend of the GWSA (14.221 mm/year) and average cumulative subsidence (17.382 mm/year) show a relatively high consistency. Finally, we analyze the heterogeneity of GWS change (GWSC) and LS change (LSC) in the four typical areas by the Lorenz curve model. The implementation of the South-to-North Water Diversion Project (MSWDP) affects the heterogeneity of GWSC and LSC. It can be seen that the largest heterogeneity of LSC lags behind the GWSC in the Tianjin-Langfang-Hengshui-Baoding area. The largest uneven subsidence in Beijing and Tianjin occurred in 2015, and the largest uneven subsidence in Hengshui-Baoding occurred in 2014. After that, the heterogeneity of subsidence gradually tends to stable.

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“…ese drastic changes of the hydraulic and geological environment also caused the evolution of the hydrogeochemical environment in confined aquifers and finally threatened the hydrochemical quality of groundwater [57], for example, the releasing of iodine into groundwater [58]. us, it is significantly necessary to perform targeted works to get insight into the hydrochemical quality, genesis, and potential quality issues of confined groundwater [59].…”

Section: Study Areamentioning

confidence: 99%

Hydrogeochemical Features and Genesis of Confined Groundwater and Health Perspectives for Sustainable Development in Urban Hengshui, North China Plain

Xiao

Liu

Hao

et al. 2021

Journal of Chemistry

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Groundwater in confined aquifers is the preferred water resource worldwide, and its hydrochemical quality is the premise for sustainable development. A systematic hydrogeochemical research was conducted to get insight into the hydrochemical characteristics, genesis, and potential health threats of confined groundwater, based on analytical data of 45 groundwater samples collected from the urban area of Hengshui, Central North China Plain (NCP). The results showed most groundwater had desirable hydrochemical quality with a nearly neutral to slightly alkaline nature and dominantly soft-fresh Cl-Na face. Solute chemistry was governed by rock-water interaction including minerals dissolution and ion exchange, but out of the anthropogenic influences. All nitrogen pollutants and Zn were within the desirable limit, while F−, Mn, and Fe were beyond the desirable limit recommended by WHO in 28.9%, 15.6%, and 68.9% of samples. Overall chronic health risk from these toxic elements was identified in terms of various populations and mainly contributed by F−. Infants were more prone to the health risks of aqueous pollutants. Differential water supplies based on hydrochemical quality are recommended, and water improvement measures are suggested to be conducted aiming at the harmful fluoride in confined groundwater. The present research could provide valuable references for the health sustainability of confined groundwater utilization in sedimentary plains like NCP worldwide.

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Impacts of sediment compaction on iodine enrichment in deep aquifers of the North China Plain

Cited by 36 publications

References 53 publications

Recent Ground Subsidence in the North China Plain, China, Revealed by Sentinel-1A Datasets

Recent Ground Subsidence in the North China Plain, China, Revealed by Sentinel-1A Datasets

Combined GRACE and MT-InSAR to Assess the Relationship between Groundwater Storage Change and Land Subsidence in the Beijing-Tianjin-Hebei Region

Hydrogeochemical Features and Genesis of Confined Groundwater and Health Perspectives for Sustainable Development in Urban Hengshui, North China Plain

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