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Zhou, X.; Li, C. |
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Title |
Hydrogeochemistry of deep formation brines in the central Sichuan Basin, China |
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Journal Article |
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Year |
1992 |
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Journal of Hydrology |
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138 |
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1 |
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1-15 |
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Abstract |
Subsurface brines are abundant in the Sichuan Basin, China. Five brine-bearing aquifers have been identified within rocks of Triassic age in the central part of the basin. These are of two types: brine-bearing clastic and brine-bearing carbonate aquifers. Brines in this region have high total dissolved solids and chemical species that are different from those of evaporatively concentrated seawater. Deep formation brines in clastic aquifers, in which evaporites do not exist, are characterized by high concentrations of Ca, Sr, Ba, Br and I, low concentrations of Mg and K, and lack of SO4, and are dominated by the NaCaCl type. Brines in carbonate aquifers, which have interbeds of evaporites, are characterized by high total dissolved solids, low concentrations of Ca, Mg and SO4, and lack of Ba, and are of the NaCl type. The brines in clastic aquifers originate from connate continental sedimentary waters mixed with marine waters; membrane filtration through shales has played an important part in modifying the chemical compositions and increasing the salinity of the brines. Those in carbonate aquifers are bittern marine sedimentary waters, with chemical compositions mainly controlled by precipitation of evaporites. |
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0022-1694 |
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Asia |
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THL @ christoph.kuells @ Zhou19921 |
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41 |
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Author |
Houben, G. |
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Title |
Annotated translation of “Die Wasserversorgung einiger Nordseebäder [The water supply of some North Sea spas]” by Alexander Herzberg (1901) |
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Journal Article |
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2018 |
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Hydrogeology Journal |
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26 |
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6 |
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1789-1799 |
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seawater intrusion, Ghijben-Herzberg |
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The publication “The water supply of some North Sea spas” by Alexander Herzberg in 1901 is a cornerstone of coastal groundwater research. It was fundamental to the development of the Ghijben-Herzberg principle, which describes the hydrostatic equilibrium between fresh and saline groundwater. Due to its age and the language barrier, the paper is often cited but probably rarely read. Therefore, the original paper has been translated from German into English, accompanied by an introduction and notes explaining the historical context. |
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de |
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1435-0157 |
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THL @ christoph.kuells @ Houben2018 |
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88 |
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Author |
Schmittner, K.-E.; Giresse, P. |
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Title |
The impact of atmospheric sodium on erodibility of clay in a coastal Mediterranean region |
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Journal Article |
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1999 |
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Environmental Geology |
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37 |
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3 |
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195-206 |
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Heavy rainfalls, between 25 and 100 mm·h–1, were simulated on Pliocene/Quaternary sediments. To reproduce the heterogeneity of natural environments, 231 small plots of various sizes (between 2.5 and 3.5 m2; mean: about 3 m2) were used. The duration of all simulations was 1 h. We used water that had been collected during natural rainfall. The concentration of clay particles in the sheet wash depended upon the concentration of dissolved sodium in the wash (for about 42%) and of the sheet wash quantity (for about 37%). Under natural water conditions colloidal matter, like clay minerals, is charged negatively and therefore is destabilized by metal cations such as in the case of Na+. Results suggest that relatively higher concentrations of montmorrillonite were related to higher concentrations of sodium as opposed to illite and kaolinite. Microflakes of up to 25 μ were observed to vary between face-to-edge and face-to-face modes (competition between protons and other cations). The concentration of dissolved sodium (Na+) in the runoff water depends on water and sodium balances such as atmospheric input, infiltration, evaporation and surface water runoff. The reduction of vegetation cover increases the amount of salt and amorphous matter in/on the topsoil between heavy rainfall generations. The best predictor to explain montmorillonite, illite and kaolinite in % of mineral clay-sized matter in the surface water runoff (sheet wash) is the percentage of each clay mineral in the topsoil. As opposed to illite and kaolinite, more sheet wash indicate for montmorillonite relatively higher concentrations in the wash. The results of model simulations were confirmed on different field plots of about 1 ha and small catchments during natural heavy rainfall events. Models can also be used to understand and to better simulate sheet, rill and gully erosion, micropedimentation; and pedimentation. |
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1432-0495 |
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THL @ luqianxue.zhang @ Schmittner1999 |
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53 |
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El-Sayed, S.A.; Ramadan, A.B.; Salama, M.H.; Diab, M. |
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Geochemical and Radiological Characteristics of Harvested Rainwater and Surficial Soil in El-Alamein-Alam El-Rum Area, Western Mediterranean Coastal Zone, Egypt |
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2015 |
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Isotope and Radiation Research |
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47 |
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2 |
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177-198 |
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THL @ luqianxue.zhang @ El-Sayed2015 |
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57 |
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Guerzoni, S.; Molinaroli, E.; Chester, R. |
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Title |
Saharan dust inputs to the W. Mediterranean Sea: depositional patterns, geochemistry and sedimentological implications |
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1997 |
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Deep-Sea Res |
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44 |
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3-4 |
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631-654 |
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THL @ luqianxue.zhang @ Guerzoni1997 |
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61 |
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