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- Derivation of flow and transport parameters from outcropping sediments of the Neogene aquifer, Belgium.
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Derivation of flow and transport parameters from outcropping sediments of the Neogene aquifer, Belgium.
Abstract
ABSTRACT. Centimetre-scale saturated hydraulic conductivities (K) are derived from air permeability measurements on a selection of outcrops of the Neogene aquifer in the Campine area, Belgium. Outcrop sediments are of Miocene to Quaternary age and have a marine to continental origin. Grain size analyses for the same outcrops and corresponding K predictions using previously developed models are also presented. We discuss outcrop hydrogeological properties and quantify the heterogeneity within the outcrops in detail using geostatistical variography. Moreover, outcrop-scale K values, their anisotropy and dispersivities are numerically calculated as a means to upscale such small-scale measurements to a larger scale commensurate with the scale of flow and transport modelling. By studying the small-scale variability as observed in outcrops, we gain crucial understanding of the larger-scale behaviour of the corresponding hydrogeological units within the Neogene aquifer, the most important groundwater reservoir of Flanders. The results of this study will equally improve conceptual hydrogeological model building and parameterization.
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About: Bart ROGIERS
Institute for Environment, Health and Safety, Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, BE-2400 Mol, Belgium.
About: Koen BEERTEN
Dept. of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200e - bus 2410, BE-3001 Heverlee, Belgium.
About: Tuur SMEEKENS
Institute for Environment, Health and Safety, Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, BE-2400 Mol, Belgium.
About: Dirk MALLANTS
Dept. of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200e - bus 2410, BE-3001 Heverlee, Belgium.
About: Matej GEDEON
Groundwater Hydrology Program, CSIRO Land and Water, Waite Road - Gate 4, Glen Osmond SA 5064, Australia.
About: Marijke HUYSMANS
Institute for Environment, Health and Safety, Belgian Nuclear Research Centre (SCK•CEN), Boeretang 200, BE-2400 Mol, Belgium.
About: Okke BATELAAN
Dept. of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200e - bus 2410, BE-3001 Heverlee, Belgium.
About: Alain DASSARGUES
Dept. of Hydrology and Hydraulic Engineering, Vrije Universiteit Brussel, Pleinlaan 2, BE-1050 Brussels, Belgium.