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Lu, C.; Xin, P.; Kong, J.; Li, L.; Luo, J. |
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Title |
Analytical solutions of seawater intrusion in sloping confined and unconfined coastal aquifers |
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Journal Article |
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2016 |
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Water Resources Research |
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52 |
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9 |
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6989-7004 |
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Keywords |
seawater intrusion, sloping coastal aquifer, analytical solution |
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Abstract |
Abstract Sloping coastal aquifers in reality are ubiquitous and well documented. Steady state sharp-interface analytical solutions for describing seawater intrusion in sloping confined and unconfined coastal aquifers are developed based on the Dupuit-Forchheimer approximation. Specifically, analytical solutions based on the constant-flux inland boundary condition are derived by solving the discharge equation for the interface zone with the continuity conditions of the head and flux applied at the interface between the freshwater zone and the interface zone. Analytical solutions for the constant-head inland boundary are then obtained by developing the relationship between the inland freshwater flux and hydraulic head and combining this relationship with the solutions of the constant-flux inland boundary. It is found that for the constant-flux inland boundary, the shape of the saltwater interface is independent of the geometry of the bottom confining layer for both aquifer types, despite that the geometry of the bottom confining layer determines the location of the interface tip. This is attributed to that the hydraulic head at the interface is identical to that of the coastal boundary, so the shape of the bed below the interface is irrelevant to the interface position. Moreover, developed analytical solutions with an empirical factor on the density factor are in good agreement with the results of variable-density flow numerical modeling. Analytical solutions developed in this study provide a powerful tool for assessment of seawater intrusion in sloping coastal aquifers as well as in coastal aquifers with a known freshwater flux but an arbitrary geometry of the bottom confining layer. |
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THL @ christoph.kuells @ Lu.etal.2016 |
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15 |
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Triki*, I.; N.Trabelsi; Zairi, M.; Dhia, H.B. |
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Multivariate statistical and geostatistical techniques for assessing groundwater salinization in Sfax, a coastal region of eastern Tunisia |
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Journal Article |
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2014 |
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Desalination Water Treat. |
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52 |
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1980-1989 |
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CUT @ phaedon.kyriakidis @ trikia2014 |
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107 |
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Krige*, D.G. |
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A statistical approach to some basic mine valuation problems on the Witwatersrand |
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1951 |
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Jour. Chem. Metall. and Mining Soc. So. Africa |
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52 (6) |
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119-139 |
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0038-223x |
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CUT @ phaedon.kyriakidis @ Krige1951 |
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157 |
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Yeh, M.; Lin, Y.; Chang, L. |
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Designing an optimal multivariate geostatistical groundwater quality monitoring network using factorial kriging and genetic algorithms |
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2006 |
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Environ. Geol. |
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50 |
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1 |
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101-121 |
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Springer Science and Business Media LLC |
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CUT @ phaedon.kyriakidis @ Yeh2006 |
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144 |
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Demirel, Z.; Güler, C. |
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Title |
Hydrogeochemical evolution of groundwater in a Mediterranean coastal aquifer, Mersin-Erdemli basin (Turkey) |
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2006 |
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Environmental geology |
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49 |
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3 |
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477-487 |
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In this study, hydrogeologic and hydrochemical information from the Mersin-Erdemli groundwater system were integrated and used to determine the main factors and mechanisms controlling the chemistry of groundwaters in the area and anthropogenic factors
presently affecting them. The PHREEQC geochemical modeling demonstrated that relatively few
phases are required to derive water chemistry in the area. In a broad sense, the reactions responsible for the hydrochemical evolution in the area fall into four categories: (1)
silicate weathering reactions; (2) dissolution of salts; (3) precipitation of calcite, amorphous silica and kaolinite; (4) ion exchange. As determined by multivariate statistical
analysis, anthropogenic factors show seasonality in the area where most contaminated waters related to fertilizer and fungicide applications that occur during early summer season. |
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THL @ luqianxue.zhang @ demirel2006hydrogeochemical |
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63 |
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