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Use of non-parametric statistics as a tool for the hydraulic and hydrogeochemical characterization of hard rock aquifers

David Banks, Geir Morland and Bjorn Frengstad
Use of non-parametric statistics as a tool for the hydraulic and hydrogeochemical characterization of hard rock aquifers (in Hydrogeology of Scotland, Alan M. MacDonald (prefacer), Harriet Carlyle (prefacer) and Jean Clews (prefacer))
Scottish Journal of Geology (2005) 41, Part 1: 69-79

Abstract

The new EU Water Framework Directive (Directive 2000/60/EC) implies that hard rock units will need to be considered as aquifers, and to be hydrogeologically and hydrogeochemically characterized. This is not a straightforward task, given that such aquifers are heterogeneous, discontinuous and strongly three-dimensional in the distributions of both hydraulic and hydrochemical properties. The Geological Survey of Norway has recently carried out characterizations of Norway's hard rock aquifers using simple non-parametric statistical techniques, focusing on median and percentile values for aquifer properties and concentrations of chemical parameters. Such characterizations reveal far larger parameter ranges within given aquifer lithological units than between different units. Indeed, for most lithologies, median well yields and concentrations of major chemical parameters (e.g. pH, major ions) are remarkably similar. For certain elements, however, systematic differences can be detected. For example, elements such as uranium, radon and fluoride are significantly enriched in Precambrian granites and gneisses, and depleted in anorthosites.


ISSN: 0036-9276
EISSN: 2041-4951
Coden: SJGEAX
Serial Title: Scottish Journal of Geology
Serial Volume: 41, Part 1
Title: Use of non-parametric statistics as a tool for the hydraulic and hydrogeochemical characterization of hard rock aquifers
Title: Hydrogeology of Scotland
Author(s): Banks, DavidMorland, GeirFrengstad, Bjorn
Author(s): MacDonald, Alan M.prefacer
Author(s): Carlyle, Harrietprefacer
Author(s): Clews, Jeanprefacer
Affiliation: Holymoor Consultancy, Chesterfield, United Kingdom
Affiliation: British Geological Survey, Edinburgh, United Kingdom
Pages: 69-79
Published: 2005
Text Language: English
Publisher: Scottish Academic Press, Edinburgh, United Kingdom
Meeting name: Groundwater in Scotland; moving up a gear
Meeting location: Stirling, GBR, United Kingdom
Meeting date: 20031112Nov. 12, 2003
References: 43
Accession Number: 2006-055397
Categories: HydrogeologyHydrochemistry
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables
N58°00'00" - N71°00'00", E04°00'00" - E31°00'00"
Secondary Affiliation: Earth Tech Engineering, GBR, United KingdomScottish Environmental Protection Agency, GBR, United KingdomNorChip AS, NOR, NorwayNorges Geologiske Undersokelse, NOR, Norway
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 200615
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