Geochemical modelling baseline compositions of groundwater

Diederik Jan Postma, Claus Kjøller, Martin Søgaard Andersen, M.T.C. de Melo, I. Gauss

Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review


Reactive transport models, were developed to explore the evolution in groundwater chemistry along the flow path in three aquifers; the Triassic East Midland aquifer (UK), the Miocene aquifer at Valreas (F) and the Cretaceous aquifer near Aveiro (P). All three aquifers contain very old groundwaters and variations in water chemistry that are caused by large scale geochemical processes taking place at the timescale of thousands of years. The most important geochemical processes are ion exchange (Valreas and Aveiro) where freshwater solutes are displacing marine ions from the sediment surface, and carbonate dissolution (East Midlands, Valreas and Aveiro). Reactive transport models, employing the code PHREEQC, which included these geochemical processes and one-dimensional solute transport were able to duplicate the observed patterns in water quality. These models may provide a quantitative understanding of the evolution in natural baseline properties in groundwater.
Original languageEnglish
Title of host publicationNatural baseline quality of groundwater
EditorsW.M. Edmunds, P. Shand
Place of PublicationOxford, UK
PublisherBlackwell Publishing
Publication date2008
Publication statusPublished - 2008

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