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Gopinath, S.; Srinivasamoorthy, K.; Saravanan, K.; Prakash, R. |
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Tracing groundwater salinization using geochemical and isotopic signature in Southeastern coastal Tamilnadu, India |
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2019 |
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Chemosphere |
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236 |
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124305 |
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Coastal groundwater, Hydrochemistry, Isotopes, Thermodynamics, Statistical analysis |
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Attempt has been made to discriminate groundwater salinity causes along the east coast of India. A total of 122 groundwater samples (61/season) were collected for two diverse seasons (Pre Monsoon and Post Monsoon) and analyzed for physical and chemical components along with stable isotopes. The Piper diagram proposes samples along the coast predisposed by saltwater incursion. Ionic ratio plots recommend groundwater discriminatory by changing geochemical signatures. The statistical correlation suggests impact of saltwater incursion, anthropogenic and rock water interaction as sources for dissolved constituents in groundwater. The thermodynamic stability plot suggests higher silicate dissolution, weathering and ion exchange prompting water chemistry nevertheless of seasons. The δ 18O and δ 2H increases towards the sea suggesting enrichment attributed to the sea water influence and rainfall influences along the southwestern parts of the study area. |
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0045-6535 |
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THL @ christoph.kuells @ Gopinath2019124305 |
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176 |
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Liu, Y.; Jin, M.; Wang, J. |
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Insights into groundwater salinization from hydrogeochemical and isotopic evidence in an arid inland basin |
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Journal Article |
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2018 |
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Hydrological Processes |
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32 |
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20 |
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3108-3127 |
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deuterium excess, groundwater salinization, Northwest China, Manas River basin, stable isotopes |
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Abstract In the Manas River basin (MRB), groundwater salinization has become a major concern, impeding groundwater use considerably. Isotopic and hydrogeochemical characteristics of 73 groundwater and 11 surface water samples from the basin were analysed to determine the salinization process and potential sources of salinity. Groundwater salinity ranged from 0.2 to 11.91 g/L, and high salinities were generally located in the discharge area, arable land irrigated by groundwater, and depression cone area. The quantitative contributions of the evaporation effect were calculated, and the various groundwater contributions of transpiration, mineral dissolution, and agricultural irrigation were identified using hydrogeochemical diagrams and δD and δ18O compositions of the groundwater and surface water samples. The average evaporation contribution ratios to salinity were 5.87% and 32.7% in groundwater and surface water, respectively. From the piedmont plain to the desert plain, the average groundwater loss by evaporation increased from 7% to 29%. However, the increases in salinity by evaporation were small according to the deuterium excess signals. Mineral dissolution, transpiration, and agricultural irrigation activities were the major causes of groundwater salinization. Isotopic information revealed that river leakage quickly infiltrated into aquifers in the piedmont area with weak evaporation effects. The recharge water interacted with the sediments and dissolved minerals and subsequently increased the salinity along the flow path. In the irrigation land, shallow groundwater salinity and Cl− concentrations increased but not δ18O, suggesting that both the leaching of soil salts due to irrigation and transpiration effect dominated in controlling the hydrogeochemistry. Depleted δ18O and high Cl− concentrations in the middle and deep groundwater revealed the combined effects of mixing with paleo-water and mineral dissolution with a long residence time. These results could contribute to the management of groundwater sources and future utilization programs in the MRB and similar areas. |
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THL @ christoph.kuells @ doi:10.1002/hyp.13243 |
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178 |
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Jalali*, M.; Karami, S.; Marj, A.F. |
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On the problem of the spatial distribution delineation of the groundwater quality indicators via multivariate statistical and geostatistical approaches |
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2019 |
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Environ. Monit. Assess. |
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191 |
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S2 |
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323 |
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Factor analysis . Geostatistics .Hydrogeochemical parameters . Multivariate statistics .Simulation . Variogram |
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Springer Science and Business Media LLC |
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CUT @ phaedon.kyriakidis @ Jalali2019 |
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142 |
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Bahir, M.; Ouhamdouch, S.; Carreira, P.M. |
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Isotopic and geochemical methods for studying water–rock interaction and recharge mode: application to the Cenomanian–Turonian and Plio-Quaternary aquifers of Essaouira Basin, Morocco |
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Journal Article |
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2018 |
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Mar. Freshwater Res. |
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69 |
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8 |
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1290-1300 |
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geochemistry, semi-arid area, stable isotopes, water resources. |
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Study of the Cenomanian–Turonian and Plio–Quaternary aquifers of Essaouira basin (Western Morocco), based on the interpretation of geochemical (major elements) and isotopic (18O, 2H, 13C and 14C) data, has aided the understanding of the hydrodynamics of these aquifers, which is greatly affected by tectonics. Hydrochemical characteristics based on the bivariate diagrams of major ions (Cl–, SO42–, NO3–, HCO3–, Na+, Mg2+, K+ and Ca2+) and electrical conductivity and mineral saturation indices indicate that the origins of groundwater mineralisation are the result of: (1) evaporite dissolution; (2) cation exchange reactions; (3) and evaporation processes. Radiogenic isotopes (3H and 14C) have highlighted the presence of significant recent recharge in the eastern part of the basin, with groundwater moving according to the general flow path (south-east to north-west). Stable isotope data from the Essaouira basin plot along the Global Meteoric Water Line and below the Local Meteoric Water Line. This suggests that groundwater has been recharged under several different climate regimes. |
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THL @ christoph.kuells @ |
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191 |
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Richter, B. C.; Kreidler, C.W. |
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Title |
Identification of Sources of Groundwater Salinization using Geochemical Techniques |
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1991 |
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EPA/600/2-91/064 |
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259 |
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Geochemistry, USA, isotopes, salinization, ground water |
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Bureau of Economic Geology, Univ. of Austin, Texas |
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EPA |
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Bledsoe, B.E. |
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en |
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