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Karatas, B.S.; Camoglu, G.; Olgen, M.K. |
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Spatio-temporal trend analysis of the depth and salinity of the groundwater, using geostatistics integrated with GIS, of the Menemen Irrigation System, Western Turkey |
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2013 |
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Ekoloji |
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22 |
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86 |
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36-47 |
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CUT @ phaedon.kyriakidis @ Karatas2013 |
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145 |
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Naranjo-Fernández, N.; Guardiola-Albert, C.; Montero-González, E. |
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Applying 3D geostatistical simulation to improve the groundwater management modelling of sedimentary aquifers: The case of Doñana (Southwest Spain) |
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2019 |
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Water |
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11 |
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39 |
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geostatistics; hydrofacies; hydrogeological model; stochastic simulation; water balance |
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Mathematical groundwater modelling with homogeneous permeability zones has been used for decades to manage water resources in the Almonte-Marismas aquifer (southwest Spain). This is a highly heterogeneous detrital aquifer which supports valuable ecological systems in the Doñana National Park. The present study demonstrates that it is possible to better characterize this heterogeneity by numerical discretization of the geophysical and lithological data available. We identified six hydrofacies whose spatial characteristics were quantified with indicator variogram modelling. Sequential Indicator Simulation then made it possible to construct a 3D geological model. Finally, this detailed model was included in MODFLOW through the Model Muse interface. This final process is still a challenge due to the difficulty of downscaling to a handy numerical modelling scale. New piezometric surfaces and water budgets were obtained. The classical model with zones and the model with 3D simulation were compared to confirm that, for management purposes, the effort of improving the geological heterogeneities is worthwhile. This paper also highlights the relevance of including subsurface heterogeneities within a real groundwater management model in the present global change scenario. |
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CUT @ phaedon.kyriakidis @ Fernandez2019 |
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156 |
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Xu, J.; Li, W.; Hong, Y.; Wei, C.; Tang, J. |
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A quantitative assessment on groundwater salinization in the Tarim River lower reaches, Northwest China |
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2014 |
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Sci. Cold Arid. Reg. |
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6(1) |
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44-51 |
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CUT @ phaedon.kyriakidis @ Xu2014 |
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126 |
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Rajabi, M.M.; Ataie-Ashtiani, B. |
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Sampling efficiency in Monte Carlo based uncertainty propagation strategies: Application in seawater intrusion simulations |
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2014 |
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Adv. Water Resour. |
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67 |
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46-64 |
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CUT @ phaedon.kyriakidis @ Rajabi2014 |
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153 |
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Zhao, Q.; Su, X.; Kang, B.; Zhang, Y.; Wu, X.; Liu, M. |
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A hydrogeochemistry and multi-isotope (Sr, O, H, and C) study of groundwater salinity origin and hydrogeochemcial processes in the shallow confined aquifer of northern Yangtze River downstream coastal plain, China |
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2017 |
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Applied Geochemistry |
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86 |
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49-58 |
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Coastal confined groundwater, Salinity, Hydrogeochemcial processes, Multiple environmental tracers |
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Economically developed coastal areas have a high water demand, and their groundwater resources can be threatened by salinization. Many methods and tracers have been used to discriminate the source of salinization because a single method does not yield reliable results. In this paper, the shallow confined coastal plain aquifer, north of the downstream Yangtze River in China, is used as a case study to investigate the origin of the salinity and the relevant geochemical processes for this aquifer. Multiple environmental tracers of major ions, minor ions (Br−, I−), and isotopes (18O, 2H, 13C, 87Sr, 3H, 14C) were used so as to provide reliable conclusions. The TDS distribution of the aquifer has an increasing trend, from below 500 mg/L in the inland areas to more than 20,000 mg/L around the southeast coastline. The water chemical type evolves from HCO3-Ca to Cl-Na as the TDS increases. The results suggest that the groundwater salinity is influenced by seawater intrusion. The seawater proportions in the groundwater samples range from 0.07% to 94.41% and show the same spatial distribution pattern as TDS. The 3H and 14C values show that the highest salinity was mainly caused by a seawater transgression around 6000a B.P. The aquifer is also affected by other hydrogeochemical processes: base exchange has enriched Ca2+ and depleted K+ and Na+, sulfate reduction has reduced the concentration of SO42− and enriched HCO3−, and iodine-rich organic matter decomposition has enriched the concentration of I−. The iodine enrichment also suggests paleo-seawater intrusion. In addition, the precipitation of carbonate minerals has decreased the concentration of Ca2+, Mg2+, and HCO3−, albeit to a limited extent. |
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0883-2927 |
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THL @ christoph.kuells @ Zhao201749 |
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182 |
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