Download Fluid Flow and Solute Movement in Sandstones: the Onshore UK by R. D. Barker, J. H. Tellam, Editors PDF
By R. D. Barker, J. H. Tellam, Editors
Sandstone aquifers are universal world wide: they comprise an important percentage of the Earth's clean water offers. notwithstanding, as a result of their textural complexity and the common prevalence of either matrix and fracture circulation, prediction of stream and pollutant migration remains to be a substantial problem. This quantity encompasses a choice of papers summarizing present study on an instance sandstone aquifer: the united kingdom Permo-Triassic Sandstone series. those crimson mattress, organic-poor sandstones are of fluvial and aeolian foundation, are frequently strongly textured, and are minimize via discontinuities of a variety of permeabilities. Matrix movement frequently dominates, yet fracture circulation additionally happens. The papers within the quantity care for study on saturated and unsaturated stream, and solute and non-aqueous-phase liquid circulate. They hide investigations from laboratory to nearby scale, and contain a variety of techniques, from petrophysical via geophysical and hydrochemical to modelling. The publication is meant to be of curiosity to researchers and practitioners keen on water assets and groundwater toxins, and to hydrogeology, water engineering, and environmental technological know-how students.Also on hand: two hundred Years of British Hydrogeology - ISBN 1862391556 Sustainable Groundwater improvement - ISBN 1862390975 Palaeowaters in Coastal Europe: Evolution of Groundwater because the overdue Pleistocene - ISBN 186239086X
Read or Download Fluid Flow and Solute Movement in Sandstones: the Onshore UK Permo-Triassic Red Bed Sequence (Geological Society Special Publication No. 263) PDF
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Additional resources for Fluid Flow and Solute Movement in Sandstones: the Onshore UK Permo-Triassic Red Bed Sequence (Geological Society Special Publication No. 263)
Mayer et al. 2001). Apart from cases of pollution (including by drilling fluid polymers: Barker 1996), there are few examples where SO4 has been substantially removed within the aquifer by reduction, the obvious limitation again being the lack of organic matter. Where reduction is occurring, the mechanisms in general have not received detailed study. Methane has been detected in a number of locations (Tellam 1994; Gooddy & Darling SOLUTE TRANSPORT 2005). Possible allochthanous sources include overlying Quaternary peat and underlying coalbearing sequences.
1 2 j Distance (m) 6000 4000 ~= 2000 U o 0 I i i | I i 2 4 6 8 10 12 Distance (m) Fig. 13. Characteristic diffusion times [=distance2/(2 x diffusion coefficient)] over distances equivalent to bed thickness ranges. SOLUTE TRANSPORT enteric viruses have been found in pumped well waters in Birmingham and Nottingham by Powell et al. (2000, 2001), and subsequently recovered in piezometers to at least 50 m below ground level (Cronin et al. 2003; Powell et al. 2003). This is significant given that survival times for such viruses are usually considered to be in terms of months.
The tortuosity of the matrix and the macroscopic fracture network is limited (actual/straight-line path length is <2). Concluding comments The UK Permo-Triassic sandstone is a continental red-bed sequence unremarkable in many ways in a worldwide context, displaying hydrogeological characteristics which are seen in many other fractured permeable-matrix aquifers. As expected, on a local scale solute movement rates are extremely variable, affected as they are by matrix, fracture and geochemical heterogeneity.