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| Author | Khaska, M.; Salle], C. [L.G.L.; Lancelot, J.; team, A.S.T.E.R.; Mohamad, A.; Verdoux, P.; Noret, A.; Simler, R. | ||||
| Title | Origin of groundwater salinity (current seawater vs. saline deep water) in a coastal karst aquifer based on Sr and Cl isotopes. Case study of the La Clape massif (southern France) | Type | Journal Article | ||
| Year | 2013 | Publication  |
Applied Geochemistry | Abbreviated Journal | |
| Volume | 37 | Issue | Pages | 212-227 | |
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| Abstract | In this study a typical coastal karst aquifer, developed in lower Cretaceous limestones, on the western Mediterranean seashore (La Clape massif, southern France) was investigated. A combination of geochemical and isotopic approaches was used to investigate the origin of salinity in the aquifer. Water samples were collected between 2009 and 2011. Three groundwater groups (A, B and C) were identified based on the hydrogeological setting and on the Cl− concentrations. Average and maximum Cl− concentrations in the recharge waters were calculated (ClRef. and ClRef.Max) to be 0.51 and 2.85mmol/L, respectively). Group A includes spring waters with Cl− concentrations that are within the same order of magnitude as the ClRef concentration. Group B includes groundwater with Cl− concentrations that range between the ClRef and ClRef.Max concentrations. Group C includes brackish groundwater with Cl− concentrations that are significantly greater than the ClRef.Max concentration. Overall, the chemistry of the La Clape groundwater evolves from dominantly Ca–HCO3 to NaCl type. On binary diagrams of the major ions vs. Cl, most of the La Clape waters plot along mixing lines. The mixing end-members include spring waters and a saline component (current seawater or fossil saline water). Based on the Br/Clmolar ratio, the hypothesis of halite dissolution from Triassic evaporites is rejected to explain the origin of salinity in the brackish groundwater. Groundwaters display 87Sr/86Sr ratios intermediate between those of the limestone aquifer matrix and current Mediterranean seawater. On a Sr mixing diagram, most of the La Clape waters plot on a mixing line. The end-members include the La Clape spring waters and saline waters, which are similar to the deep geothermal waters that were identified at the nearby Balaruc site. The 36Cl/Cl ratios of a few groundwater samples from group C are in agreement with the mixing hypothesis of local recharge water with deep saline water at secular equilibrium within a carbonate matrix. Finally, PHREEQC modelling was run based on calcite dissolution in an open system prior to mixing with the Balaruc type saline waters. Modelled data are consistent with the observed data that were obtained from the group C groundwater. Based on several tracers (i.e. concentrations and isotopic compositions of Cl and Sr), calculated ratios of deep saline water in the mixture are coherent and range from 3% to 16% and 0% to 3% for groundwater of groups C and B, respectively. With regard to the La Clape karst aquifer, the extension of a lithospheric fault in the study area may favour the rise of deep saline water. Such rises occur at the nearby geothermal Balaruc site along another lithospheric fault. At the regional scale, several coastal karst aquifers are located along the Gulf of Lion and occur in Mezosoic limestones of similar ages. The 87Sr/86Sr ratios of these aquifers tend toward values of 0.708557, which suggests a general mixing process of shallow karst waters with deep saline fossil waters. The occurrence of these fossil saline waters may be related to the introduction of seawater during and after the Flandrian transgression, when the highly karstified massifs invaded by seawater, formed islands and peninsulas along the Mediterranean coast. | ||||
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| ISSN | 0883-2927 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | THL @ christoph.kuells @ Khaska2013212 | Serial | 84 | ||
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| Author | Makkawi, M.H. | ||||
| Title | Geostatistics as a groundwater exploration planning tool: case of a brackish-saline aquifer | Type | Journal Article | ||
| Year | 2015 | Publication |
Arab. J. Geosci. | Abbreviated Journal | |
| Volume | 8 | Issue | Pages | 3311-3319 | |
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| Notes | Approved | no | |||
| Call Number | CUT @ phaedon.kyriakidis @ Mahmoodifard2014 | Serial | 130 | ||
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| Author | Karami, S.; Jalali, M.; Katibeh, H.; Marj, A.F. | ||||
| Title | Groundwater hydrogeochemical assessment using advanced spatial statistics methods: a case study of Tehran-Karaj plain aquifer, Iran | Type | Journal Article | ||
| Year | 2020 | Publication |
Arab. J. Geosci. | Abbreviated Journal | |
| Volume | 13 | Issue | 2 | Pages | 84 |
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| Publisher | Springer Science and Business Media LLC | Place of Publication | Editor | ||
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| Notes | Approved | no | |||
| Call Number | CUT @ phaedon.kyriakidis @ Karami2020 | Serial | 143 | ||
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| Author | Alexakis, D.; Gotsis, D.; Giakoumakis, S. | ||||
| Title | Evaluation of soil salinization in a Mediterranean site (Agoulinitsa district—West Greece) | Type | Journal Article | ||
| Year | 2015 | Publication |
Arabian Journal of Geosciences | Abbreviated Journal | |
| Volume | 8 | Issue | 3 | Pages | 1373-1383 |
| Keywords | Agricultural soil . Soil quality . Soil salinization | ||||
| Abstract | Soil salinization is an environmental problem having significant impacts on the soil–water–plant system. This problem is more frequent in coastal areas due to seawater intrusion into the land. Assessing the soil salinization is a critical issue for the agricultural areas situated in the Mediterranean basin. This paper examines the deterioration of soil quality in the cultivated land of a Mediterranean site (Agoulinitsa district—West Greece). Soil samples were collected in both pre-irrigation and post-irrigation seasons. Electrical conductivity (EC), pH and the ions Br−, Ca2+, Cl−, F−, K+, Li+, Mg2+, Na+, NH4 +, NO2 −, NO3 −, PO4 3− and SO4 2− were determined by the 1:2 (soil/water ratio on weight basis) method. The salts which were present in both seasons in the soils of the area studied are KCl, MgCl2, NaCl, CaSO4 and K2SO4. The wide spatiotemporal variation of EC in the cultivated land in both seasons demonstrates that soil salinity is controlled mainly by seawater intrusion and anthropogenic factors such as the application of salt-rich water which is directly pumped from the drainage ditches. Seawater intrusion provides the affected soil with elevated contents of Ca2+, Cl−, K+, Mg2+, Na+ and SO4 2−. Classification of the soils by using criteria given by the literature is discussed. Practices to prevent, or at least ameliorate, salinization in the cultivated land of Agoulinitsa district are proposed. |
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| Publisher | Springer | Place of Publication | Editor | ||
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| ISSN | 1866-7511 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | THL @ luqianxue.zhang @ Alexakis2015 | Serial | 42 | ||
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| Author | Emadi*, M.; Baghernejad, M. | ||||
| Title | Comparison of spatial interpolation techniques for mapping soil pH and salinity in agricultural coastal areas, northern Iran | Type | Journal Article | ||
| Year | 2014 | Publication |
Arch. Agron. Soil Sci. | Abbreviated Journal | |
| Volume | 60:9 | Issue | Pages | 1315-1327 | |
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| Notes | Approved | no | |||
| Call Number | CUT @ phaedon.kyriakidis @ Emadia2014 | Serial | 136 | ||
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