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Ali, R.; Salama, R.; Pollock, D.; Bates, L. |
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Geochemical interactions between groundwater and soil, groundwater recycling and evaporation in the ORIA |
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2002 |
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CSIRO Land and Water |
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THL @ luqianxue.zhang @ Ali2002 |
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50 |
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Author |
Morales-Baquero, R.; Pulido-Villena, E.; Reche, I. |
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Title |
Chemical signature of Saharan dust on dry and wet atmospheric deposition in the south-western Mediterranean region |
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2013 |
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Tellus B: Chemical and Physical Meteorology |
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65 |
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1 |
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18720 |
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We studied if the presence of Saharan dust intrusions and the rains modify the chemical signature of the wet and dry deposition in the southern Iberian Peninsula. We have sorted the 109 sampling weeks by the presence (rainy weeks) or absence (dry weeks) of rain and by the occurrence or not of Saharan dust intrusions. Dry deposition dominated the delivery of particulate material (PM), total phosphorus (TP), soluble reactive phosphorus (SRP), Ca2+, Mg2+ and K+, whereas wet deposition dominated the delivery of Na+, total nitrogen, and . In the dry weeks, the presence of Saharan dust intrusions lead to higher inputs of PM, TP, SRP, Ca2+, Mg2+ and K+ in the dry deposition. Conversely, in the rainy weeks, there were no differences in mean values of dry deposition irrespective of the occurrence of Saharan dust intrusions. Nevertheless, in the presence of Saharan intrusions and some rain, the weekly collection of PM, TP and Ca2+ in dry deposition were significantly higher and increased as rainfall was lower. By contrast, the ions Cl– and Na+ in wet deposition were higher in absence of Saharan dust intrusion and increased as rainfall increased. |
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Taylor & Francis |
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THL @ luqianxue.zhang @ doi:10.3402/tellusb.v65i0.18720 |
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54 |
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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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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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Vengosh, A.; Spivack, A.J.; Artzi, Y.; Ayalon, A. |
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Geochemical and boron, strontium, and oxygen isotopic constraints on the origin of the salinity in groundwater from the Mediterranean coast of Israel |
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1999 |
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Water Resources Research |
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35 |
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1877-1894 |
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In order to identify the origin of the salinity and formation of saline plumes in the central part of the Mediterranean coastal aquifer of Israel, we determined the elemental and boron, strontium, and oxygen isotopic compositions of fresh and brackish groundwater (C1 up to 1500 mg/L). We distinguish between two key anthropogenic sources: (1) sewage effluents used for irrigation with high Na/C1, SO4/C1, and B/C1 ratios and low Br/C1 ratios relative to seawater ratios, low ;5•B values (0-10%o) and high ;5•80 values (>-4%0); and (2) imported water from the Sea of Galilee that is artificially
recharged tothe aquifer with high Br/C1 (3 x 10 -3) and ;5•80 values (-1%o) and a low 87Sr/86Sr ratio of 0.70753. The brackish groundwater from the saline plumes have relatively low Na/C1 ratios (0.5-0.8) and high Ca/Mg, Mg/C1, and Ca/(SO 4 q- HCO3) (> l) ratios relative to seawater ratios; marine SO4/C1 and Br/C1 ratios;5•B values of 24.8-49.9%0; 18 87 86 ;50 of -2.95%0 to -4.73%0; and Sr/ Sr ratios of 0.708275-0.708532. The composition of most of the investigated groundwater from the saline plumes differs from those of the 87 86 anthropogenic sources, imported water, fresh uncontaminated groundwater (Sr/ Sr of 0.70866, ;5•B of 20-30%o), and saline water from the adjacent Eocene aquitard. Only in ß 18 areas of artificial recharge does local groundwater have high Br/C1 and ;50 values that are typical to the Sea of Galilee. The linear relationships between chloride and most of the ions, including Band Sr, the relatively high ;5•B (>30%0) and low ;5•80 (<-4%0) values, and the chemical signature of the saline plumes (e.g., marine Br/C1 and SO4/C1 ratios), suggest that (1) mixing processes control the chemical composition of the brackish water within the aquifer, and (2) the saline postulated end-member has a chemical composition that resembles modified seawater with a marine and higher ;5•B values, and a 87Sr/86Sr ratio of <0.7083. We propose that most of the salinization phenomena and the formation of saline plumes in the inner parts of the coastal aquifer are derived from upconing of underlying natural saline water bodies and enhanced by overexploitation and draw-down of the overlying fresh groundwater. |
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Wiley Online Library |
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THL @ luqianxue.zhang @ vengosh1999geochemical |
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62 |
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