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pro vyhledávání: '"Stephen R. H. Worthington"'
Autor:
Stephen R. H. Worthington
Publikováno v:
Hydrogeology Journal. 31:87-96
Autor:
Stephen R. H. Worthington
Publikováno v:
Hydrogeology Journal. 29:21-32
The permeability of carbonate aquifers varies widely, but the major factors that influence changes in permeability with depth are not well established. Trends in permeability and solute concentration data were analysed for four carbonate aquifers whe
Publikováno v:
Geological Society, London, Special Publications. 517
The Cretaceous Chalk in England forms dual-porosity aquifers, with low-permeability matrix and high-permeability networks of fissures, which are predominantly stress-relief fractures that have been enlarged by dissolution. This enlargement is a funct
Publikováno v:
Geological Society, London, Special Publications. 517
The conceptualizations of matrix, fracture and fissure porosity are important for understanding relative controls on storage and flow of groundwater, and the transport of solutes (and non-aqueous phase liquids) within chalk aquifers. However, these d
Autor:
Stephen R. H. Worthington
Publikováno v:
Hydrogeology Journal. 26:2117-2120
Numerical models play a prominent role in hydrogeology, with simplifying assumptions being inevitable when implementing these models. However, there is a risk of oversimplification, where important processes become neglected. Such processes may be as
Publikováno v:
Journal of Hydrology. 552:70-80
Turbulent flow has a different hydraulic response compared to laminar flow and so it is important to be able to identify its occurrence in an aquifer, and to predict where it is likely to be found. Turbulent flow is associated with large apertures an
Autor:
Stephen R. H. Worthington, Geary M. Schindel, Pierre-Yves Jeannin, E. Calvin Alexander, Gareth J. Davies
Publikováno v:
Hydrogeology Journal. 25:1237-1240
It is generally considered that karst aquifers have distinctly different properties from other bedrock aquifers. A search of the literature found five definitions that have been proposed to differentiate karst aquifers from non-karstic aquifers. The
Publikováno v:
Journal of Hydrology. 598:126451
Celerity (the speed of a pressure wave) in fracture networks in bedrock can result in large and rapid water level responses in both aquifers and streams, but has been little documented in detail. To examine the role played by preferential flow in fra
Publikováno v:
Hydrogeology Journal. 25:1003-1016
Contamination of the Paleozoic carbonate aquifer at Walkerton (Ontario, Canada) by pathogenic bacteria following heavy rain in May 2000 resulted in 2,300 illnesses and seven deaths. Subsequent tracer testing showed that there was rapid groundwater fl
Publikováno v:
Earth-Science Reviews. 160:188-202
The permeability of bedrock aquifers varies by more than four orders of magnitude between different lithologies, but the reasons for this large range remain unexplained. In this review, we examine the role that weathering plays in enhancing the perme