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Bailey, R.T. |
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Title  |
Selenium contamination, fate, and reactive transport in groundwater in relation to human health |
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2017 |
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Hydrogeology Journal |
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25 |
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4 |
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1191-1217 |
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THL @ luqianxue.zhang @ bailey2017selenium |
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77 |
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Author |
Conde, J.E.; Sanz Alaejos, M. |
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Title |
Selenium concentrations in natural and environmental waters |
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1997 |
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Chemical Reviews |
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97 |
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6 |
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1979-2004 |
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ACS Publications |
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THL @ luqianxue.zhang @ conde1997selenium |
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98 |
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Sebben, M.L.; Werner, A.D.; Graf, T. |
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Title |
Seawater intrusion in fractured coastal aquifers: A preliminary numerical investigation using a fractured Henry problem |
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Journal Article |
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2015 |
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Advances in Water Resources |
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85 |
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93-108 |
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Despite that fractured coastal aquifers are widespread, the influence of fracture characteristics on seawater intrusion (SWI) has not been explored in previous studies. This research uses numerical modelling in a first step towards understanding the influence of fracture orientation, location and density on the extent of seawater and accompanying patterns of groundwater discharge in an idealised coastal aquifer. Specifically, aquifers containing single fractures or networks of regularly spaced fractures are studied using modified forms of the Henry SWI benchmark problem. The applicability of equivalent porous media (EPM) models for representing simple fracture networks in steady-state simulations of SWI is tested. The results indicate that the influence of fractures on SWI is likely to be mixed, ranging from enhancement to reduction in seawater extent and the width of the mixing zone. For the conceptual models considered here, vertical fractures in contact with the seawater wedge increase the width of the mixing zone, whereas vertical fractures inland of the wedge have minimal impact on the seawater distribution. Horizontal fractures in the lower part of the aquifer force the wedge seaward, whereas horizontal fractures located within the zone of freshwater discharge enhance the wedge. Inclined fractures roughly parallel to the seawater-freshwater interface increase the landward extent of seawater and fractures perpendicular to the interface inhibit the wedge. The results show that EPM models are likely inadequate for inferring salinity distributions in most of the fractured cases, although the EPM approach may be suitable for orthogonal fracture networks if fracture density is high and appropriate dispersivity values can be determined. |
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0309-1708 |
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THL @ christoph.kuells @ Sebben2015 |
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37 |
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Kurunc, A.; Ersahin, S.; Sonmez, N.K.; Kaman, H.; Uz, I.; Uz, B.Y.; Aslan, G.E. |
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Seasonal changes of spatial variation of some groundwater quality variables in a large irrigated coastal Mediterranean region of Turkey |
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2016 |
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Science of the Total Environment |
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554 |
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53-63 |
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Soil and groundwater degradations have taken considerable attention, recently. We studied spatial and temporal variations of groundwater table depth and contours, and groundwater pH, electrical conductivity (EC), and nitrate (NO3) content in a large irrigated area in Western Mediterranean region of Turkey. These variables were
monitored during 2009 and 2010 in previously constructed 220 monitoring wells. We analyzed the data by geostatistical techniques and GIS. Spatial variation of groundwater table depth (GTD) and groundwater table contours (GTC) remained similar across the four sampling campaigns. The values for groundwater NO3 content, EC, and pH values ranged from 0.01 to 454.1 g L−1 , 0.06 to 46.0 dS m−1 and 6.53–9.91, respectively. Greatest
geostatistical range (16,964 m) occurred for GTC and minimum (960 m) for groundwater EC. Groundwater NO3 concentrations varied both spatially and temporally. Temporal changes in spatial pattern of NO3 indicated that land use and farming practices influenced spatial and temporal variation of groundwater NO3. Several hot spots occurred for groundwater NO3 content and EC. These localities should be monitored more frequently and
land management practices should be adjusted to avoid soil and groundwater degradation. The results may have important implications for areas with similar soil, land use, and climate conditions across the Mediterranean region. |
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Elsevier |
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0048-9697 |
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THL @ luqianxue.zhang @ Kurunc2016 |
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45 |
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Author |
Rajabi, M.M.; Ataie-Ashtiani, B. |
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Title |
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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