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Author Han, D.; Post, V.E.A.; Song, X.
Title Groundwater salinization processes and reversibility of seawater intrusion in coastal carbonate aquifers Type Journal Article
Year 2015 Publication Journal of Hydrology Abbreviated Journal
Volume (down) 531 Issue Pages 1067-1080
Keywords
Abstract Seawater intrusion (SWI) has led to salinization of fresh groundwater reserves in coastal areas worldwide and has forced the closure of water supply wells. There is a paucity of well-documented studies that report on the reversal of SWI after the closure of a well field. This study presents data from the coastal carbonate aquifer in northeast China, where large-scale extraction has ceased since 2001 after salinization of the main well field. The physical flow and concomitant hydrogeochemical processes were investigated by analyzing water level and geochemical data, including major ion chemistry and stable water isotope data. Seasonal water table and salinity fluctuations, as well as changes of δ2H–δ18O values of groundwater between the wet and dry season, suggest local meteoric recharge with a pronounced seasonal regime. Historical monitoring testifies of the reversibility of SWI in the carbonate aquifer, as evidenced by a decrease of the Cl− concentrations in groundwater following restrictions on groundwater abstraction. This is attributed to the rapid flushing in this system where flow occurs preferentially along karst conduits, fractures and fault zones. The partially positive correlation between δ18O values and TDS concentrations of groundwater, as well as high NO3− concentrations (\textgreater39mg/L), suggest that irrigation return flow is a significant recharge component. Therefore, the present-day elevated salinities are more likely due to agricultural activities rather than SWI. Nevertheless, seawater mixing with fresh groundwater cannot be ruled out in particular where formerly intruded seawater may still reside in immobile zones of the carbonate aquifer. The massive expansion of fish farming in seawater ponds in the coastal zone poses a new risk of salinization. Cation exchange, carbonate dissolution, and fertilizer application are the dominant processes further modifying the groundwater composition, which is investigated quantitatively using hydrogeochemical models.
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Publisher Elsevier Place of Publication Editor
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Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0022-1694 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number THL @ christoph.kuells @ Han2015 Serial 24
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Author Cary, L.; Petelet-Giraud, E.; Bertrand, G.; Kloppmann, W.; Aquilina, L.; Martins, V.; Hirata, R.; Montenegro, S.M.G.L.; Pauwels, H.; Chatton, E.; Franzen, Melissa; Aurouet, A.; Lasseur, E.; Picot-Colbeaux, G.; Guerrot, C.; Fléhoc, C.; Labasque, T.; Santos, Jeane Glaucia; Paiva, Anderson L.R.; Braibant, G.; Pierre, D.
Title Origins and processes of groundwater salinization in the urban coastal aquifers of Recife (Pernambuco, Brazil): a multi-isotope approach Type Journal Article
Year 2015 Publication Science of the Total Environment Abbreviated Journal
Volume (down) 530-531 Issue Pages 411-429
Keywords Salinization origins; Salinization processes; Groundwater; Coastal aquifer; Strontium isotopes; Boron isotopes; Recife; Brazil
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Corporate Author Thesis
Publisher Elsevier Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
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ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number THL @ christoph.kuells @ cary:hal-01161949 Serial 85
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Author Hussain*, M.S.; Javadi, A.A.; Asr, A.A.; Farmani, R.
Title A surrogate model for simulation-optimization of aquifer systems subjected to seawater intrusion Type Journal Article
Year 2015 Publication J. Hydrol. Abbreviated Journal
Volume (down) 523 Issue Pages 542-554
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Notes Approved no
Call Number CUT @ phaedon.kyriakidis @ hussain2015 Serial 114
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Author Pearce, C.R.; Parkinson, I.J.; Gaillardet, J.; Chetelat, B.; Burton, K.W.
Title Characterising the stable (δ88/86Sr) and radiogenic (87Sr/86Sr) isotopic composition of strontium in rainwater Type Journal Article
Year 2015 Publication Chemical Geology Abbreviated Journal
Volume (down) 409 Issue Pages 54-60
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Corporate Author Thesis
Publisher Elsevier Place of Publication Editor
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Area Expedition Conference
Notes Approved no
Call Number THL @ luqianxue.zhang @ pearce2015characterising Serial 96
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Author Edwards, P.J.; Williard, K.W.J.; Schoonover, J.E.
Title Fundamentals of watershed hydrology Type Journal Article
Year 2015 Publication Journal of contemporary water research & education Abbreviated Journal
Volume (down) 154 Issue 1 Pages 3-20
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Publisher Wiley Online Library Place of Publication Editor
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Notes Approved no
Call Number THL @ luqianxue.zhang @ edwards2015fundamentals Serial 101
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