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Author |
Dhar, A.; Patil, R.S. |
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Title |
Fuzzy uncertainty based design of groundwater quality monitoring networks |
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Journal Article |
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Year |
2011 |
Publication |
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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Author |
Pacheco, F.A.L.; Szocs, T. |
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Title |
“Dedolomitization reactions” driven by anthropogenic activity on loessy sediments, SW Hungary |
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Journal Article |
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Year |
2006 |
Publication |
Applied Geochemistry |
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21 |
Issue |
4 |
Pages |
614-631 |
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Abstract |
In the Szigetvár area, SW Hungary, shallow groundwaters draining upper Pleistocene loess and Holocene sediments are considerably contaminated by domestic effluents and leachates of farmland fertilizers. The loess contains calcite and dolomite, but gypsum was not recognized in these sediments. The anthropogenic inputs contain significant amounts of Ca and SO4. The Ca from these anthropogenic inputs is promoting calcite growth, with concomitant consumption of carbonate alkalinity, undersaturation of the system with respect to dolomite, and dolomite dissolution; in brief, is driving “dedolomitization reactions”. Geochemical arguments supporting the occurrence of “dedolomitization reactions” in the area are provided by the results of mass balance and thermodynamic analyses. The mass balances predicted the weather sequence dolomite\textgreatercalcite\textgreaterplagioclase\textgreaterK-feldspar, at odds with widely accepted sequences of weatherability where calcite is the first mineral in the weathering sequence. The exchange between calcite and dolomite can be a side effect of “dedolomitization reactions” because they cause precipitation of calcite. The thermodynamic prerequisites for “dedolomitization reactions” are satisfied by most local groundwaters (70%) since they are supersaturated (or in equilibrium) with respect to calcite, undersaturated (or in equilibrium) with respect to dolomite, and undersaturated with respect to gypsum. The Ca vs. SO4 and Mg vs. SO4 trends are also compatible with homologous trends resulting from “dedolomitization reactions”. |
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0883-2927 |
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THL @ christoph.kuells @ Pacheco2006 |
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35 |
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Di Lorenzo, T.; Galassi, D.M.P. |
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Title |
Agricultural impact on Mediterranean alluvial aquifers: do groundwater communities respond? |
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Journal Article |
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Year |
2013 |
Publication |
Fundamental and Applied Limnology/Archiv für Hydrobiologie |
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Volume |
182 |
Issue |
4 |
Pages |
271-282 |
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Keywords |
alluvial aquifers, groundwater, stygobiont, nitrate, overexploitation |
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Abstract |
In Mediterranean countries agricultural development heavily depends on groundwater availability due
to arid and semi-arid climate and poor surface-water resources. Agriculture represents one of the most relevant
pressures which generate impacts in alluvial aquifers by means of fertilizers and pesticides usage and groundwater
overexploitation. Until now, very few studies have addressed the ecological response of groundwater fauna to
groundwater contamination and overexploitation due to agricultural practices. We investigated a Mediterranean
alluvial aquifer heavily affected by nitrates contamination and groundwater abstraction stress due to crop irrigation. The aim of this study was to evaluate the sensitivity of groundwater communities to (a) groundwater nitrate
contamination, (b) groundwater abstraction due to irrigation practices, and (c) saltwater intrusion. The present
work suggests that nitrate concentration lower than 150 mg l
–1 is not an immediate threat to groundwater biodiversity in alluvial aquifers. This conclusion must be carefully considered in the light of the total lack of knowledge
of the effects of long-term nitrate pollution on the groundwater biota. Moreover, local extinctions of less tolerant
species, prior to monitoring, cannot be ruled out. Conversely, species abundances in ground water are affected by
groundwater withdrawal, but species richness may be less sensitive. This result is attributable to the disappearance
of saturated microhabitats and to the depletion of fine unconsolidated sediments, reducing the surface available
to bacterial biofilm, which represent the trophic resource for several groundwater invertebrates and where the
main aquifer self-purification processes, such as denitrification, take place. Saltwater intrusion seems not to affect
groundwater species at the values measured in this coastal aquifer. |
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E. Schweizerbart'sche Verlagsbuchhandlung |
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1863-9135 |
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THL @ luqianxue.zhang @ DiLorenzo2013 |
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43 |
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Author |
Bailey, R.T. |
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Title |
Selenium contamination, fate, and reactive transport in groundwater in relation to human health |
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2017 |
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Hydrogeology Journal |
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25 |
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4 |
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1191-1217 |
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Springer |
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THL @ luqianxue.zhang @ bailey2017selenium |
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77 |
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Author |
Bouzourra, H.; Bouhlila, R.; Elango, L.; Slama, F.; Ouslati, N. |
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Title |
Characterization of mechanisms and processes of groundwater salinization in irrigated coastal area using statistics, GIS, and hydrogeochemical investigations |
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Year |
2015 |
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Environmental Science and Pollution Research |
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22 |
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4 |
Pages |
2643-2660 |
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THL @ luqianxue.zhang @ bouzourra2015characterization |
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78 |
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