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Johnson, J. S., Baker, L. A., & Fox, P. (1999). Geochemical transformations during artificial groundwater recharge: soil–water interactions of inorganic constituents. Water research, 33(1), 196–206.
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Pezzarossa, B., Piccotino, D., & Petruzzelli, G. (1999). Sorption and desorption of selenium in different soils of the Mediterranean area. Communications in soil science and plant analysis, 30(19-20), 2669–2679.
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Stigter, T. Y., van Ooijen, S. P. J., Post, V. E. A., Appelo, C. A. J., & Carvalho Dill, A. M. M. (1998). A hydrogeological and hydrochemical explanation of the groundwater composition under irrigated land in a Mediterranean environment, Algarve, Portugal. Journal of Hydrology, 208(3), 262–279.
Abstract: In the Campina de Faro, in the south of Portugal, agricultural practices have a large impact on groundwater composition. These practices involve pumping of water for irrigation from combinations of large diameter, shallow wells (noras) and small diameter, deep boreholes (furos). Excess irrigation water returns to the aquifer and mixes with water from the regional groundwater flow system. This irrigation return flow is concentrated by strong evapotranspiration and by flushing of fertilisers. The concentration increase induces cation exchange, whereby Ca on the soil exchanger is replaced by Na. The mixing in the aquifer allows application of a mixing cell model which may then be used to calculate transmissivities from the Cl mass balance. The calculations are complicated by the time-variant behaviour of Cl and the method is adjusted to calculate the change of chloride in time. Results from the calculations appear to be in good agreement with hydrochemical observations.
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Guerzoni, S., Molinaroli, E., & Chester, R. (1997). Saharan dust inputs to the W. Mediterranean Sea: depositional patterns, geochemistry and sedimentological implications. Deep-Sea Res, 44(3-4), 631–654.
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Conde, J. E., & Sanz Alaejos, M. (1997). Selenium concentrations in natural and environmental waters. Chemical Reviews, 97(6), 1979–2004.
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