Groundwater vulnerability mapping in Scotland: modifications to classification used in England and Wales
M. A. Lewis, A. Lilly, J. S. Bell, 2000. "Groundwater vulnerability mapping in Scotland: modifications to classification used in England and Wales", Groundwater in the Celtic Regions: Studies in Hard Rock and Quaternary Hydrogeology, N. S. Robins, B. D. R. Misstear
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The recently published groundwater vulnerability map of Fife is the first in a series of maps for the Scottish Environment Protection Agency (SEPA), which includes the unpublished maps of the areas around Dumfries and Strathmore. Based on the methodology used on the Environment Agency maps of England and Wales, the lithology and permeability of the geological formations, and the physical and chemical properties of the soils are classified to produce 15 groundwater vulnerability classes. However, the Scottish maps incorporate several modifications that improve their accuracy and usefulness.
the geological formations are classified solely on the basis of their permeability and do not also incorporate aquifer potential;
the occurrence of low permeability drift deposits at the surface are shown over the whole of the map area instead of only where they overlie aquifers;
areas where borehole data indicate that significant thicknesses of low permeability deposits are present in the drift sequence are shown. In these areas groundwater in the underlying solid rock formations may have a lower risk of contamination than indicated by the vulnerability zones. This is particularly useful information where the clay occurs beneath permeable drift deposits. The borehole distribution is shown to give an indication of the reliability of the boundaries;
nitrate vulnerable zones are shown;
the leaching potential classification of soils with organic surface layers has been improved.
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Groundwater in the Celtic Regions: Studies in Hard Rock and Quaternary Hydrogeology
This book covers a diverse range of hydrogeological environments that occur in the Celtic regions of Britain and Ireland. These include hard rock aquifers of Lower Palaeozoic and Precambrian age, generally dominated by fracture flow within a shallow zone of weathering; Carboniferous Limestone aquifers, often characterized by conduit flows in karstic systems; dual-porosity Permo-Triassic sandstone aquifers; and Quaternary deposits, many of which form shallow granular aquifers. The papers presented here address a number of current issues common to the Celtic regions, including: groundwater protection policies, groundwater management in karst aquifers, groundwater development in Quaternary aquifers, groundwater evaluation in data-scarce aquifers and groundwater supplies to small island communities.