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Qi, H.; Ma, C.; He, Z.; Hu, X.; Gao, L. |
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Title |
Lithium and its isotopes as tracers of groundwater salinization: A study in the southern coastal plain of Laizhou Bay, China |
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Journal Article |
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Year |
2019 |
Publication |
The Science of the Total Environment |
Abbreviated Journal |
Sci Total Environ |
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650 |
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Pt 1 |
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878-890 |
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Brine and seawater intrusion; Groundwater salinization; Hydrochemistry; Lithium isotope; Southern coastal plain of Laizhou Bay |
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Abstract |
In the southern coastal plain of Laizhou Bay, due to intensive exploitation of groundwater since the early 1970s, the shallow aquifer has been severely influenced by saltwater intrusion, which causes the extraction to shift from shallow to deeper aquifer changing the hydrogeological condition greatly. This study was conducted to investigate the groundwater salinization using hydrochemistry and H, O and Li isotope data. Dissolved Li shows a linear correlation with Cl and Br in seawater, brine and saline groundwater indicating the marine Li source, whereas the enrichment of Li in surface water, brackish and fresh groundwater is impacted by dissolution of silicate minerals. The analyses of hydrochemistry and isotopes (H, O and Li) indicate that brine originated from seawater evaporation, followed by mixing processes and some water-rock interactions; shallow saline groundwater originated from brine diluted with seawater and fresh groundwater; deep saline groundwater originated from seawater intrusion. The negative correlation of δ(7)Li and Li/Na in surface water, brackish and fresh groundwater is contrary to the general conclusion, indicating the slow weathering of silicate minerals and hydraulic interaction between surface water and shallow groundwater in this area. The analyses of hydrochemistry and isotopes (Li, H and O) can well identify the salinity sources and isotope fractionation in groundwater flow and mixing, especially groundwater with high TDS. As both mixing with saltwater and isotope fractionation can explain the combination of high δ(7)Li and low TDS in brackish groundwater, isotope fractionation may limit their use in recognizing salinity sources of groundwater with low TDS. |
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School of Environmental Studies, China University of Geosciences, Wuhan 430074, China |
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English |
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0048-9697 |
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PMID:30308862 |
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THL @ christoph.kuells @ |
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184 |
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Dhar, A.; Patil, R.S. |
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Title |
Fuzzy uncertainty based design of groundwater quality monitoring networks |
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2011 |
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J. Environ. Res. Develop. |
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5 |
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3a |
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683-688 |
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CUT @ phaedon.kyriakidis @ Dhar2011 |
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140 |
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Priyanka*, B.N.; Mohan Kumar, M.S. |
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Title |
Direct and inverse modeling of seawater intrusion: A Perspective |
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2017 |
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J. Geol. Soc. India |
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90 |
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595-601 |
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CUT @ phaedon.kyriakidis @ Priyanka2017 |
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152 |
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Lucia, M.D.; Kempka, T.; Jatnieks, J.; Kuhn, M. |
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Integrating surrogate models into subsurface simulation framework allows computation of complex reactive transport scenarios |
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2017 |
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Energy Procedia |
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125 |
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580-587 |
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CUT @ phaedon.kyriakidis @ lucia2017 |
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112 |
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Li*, L.; Zhou, H.; Franssen, H.J.H.; Gómez-Hernández, J.J. |
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Groundwater flow inverse modeling in non-MultiGaussian media: performance assessment of the normal-score Ensemble Kalman Filter |
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2012 |
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Hydrol. Earth Syst. Sci. |
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16 |
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2 |
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573-590 |
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Copernicus GmbH |
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CUT @ phaedon.kyriakidis @ Li2012 |
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154 |
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