Biogeosciences www.biogeosciences.net 1726-4170 1726-4189 4 4 2007 10.5194/bg-4-627-2007 http://www.biogeosciences.net/4/627/2007/ http://www.biogeosciences.net/4/627/2007/bg-4-627-2007.html http://www.biogeosciences.net/4/627/2007/bg-4-627-2007.pdf 627 646 2007-08-09 Quantifying biologically and physically induced flow and tracer dynamics in permeable sediments F. J. R. Meysman f.meysman@nioo.knaw.nl O. S. Galaktionov P. L. M. Cook F. Janssen M. Huettel J. J. Middelburg Centre for Estuarine and Marine Ecology (CEME), The Netherlands Institute of Ecology (NIOO-KNAW), Korringaweg 7, 4401 NT Yerseke, The Netherlands Max Planck Institute for Marine Microbiology, Celsiusstr. 1, Bremen, 28359, Germany Department of Oceanography, Florida State University, Tallahassee, FL 32306-4320, USA now at: CSIRO Land and Water, 120 Meiers Rd Indooroopilly, 4075, Qld, Australia Insight in the biogeochemistry and ecology of sandy sediments crucially depends on a quantitative description of pore water flow and the associated transport of various solutes and particles. We show that widely different problems can be modelled by the same flow and tracer equations. The principal difference between model applications concerns the geometry of the sediment-water interface and the pressure conditions that are specified along this boundary. We illustrate this commonality with four different case studies. 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