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Regional distribution of ground temperature in the Chalk aquifer of London, UK

Lookup NU author(s): David Banks

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Abstract

The distribution of subsurface temperature beneath London (with emphasis on the depth interval between 60 and 100 m below ground level) has been estimated from fluid temperature logs run in boreholes and water wells during the 1980s to the 2000s. Although the temperature distribution in the Lea Valley-New River area may have been disturbed as a result of artificial recharge-abstraction trials and operation, one can elsewhere identify a clear trend of increasing temperature from east (15 degrees C). The observed pattern is speculatively explained by: (1) the thick Tertiary sequence and low transmissivity of the Chalk in the SW resulting in a temperature at depth compatible with that expected from conduction of the prevailing geothermal flux; (2) recharge of cooler water through Chalk-Basal Sands subcrop and down-dip towards abstraction centres in central London potentially modifying the geothermal gradient via advective processes.

Publication metadata

Author(s): Headon J, Banks D, Waters A, Robinson VK

Publication type: Article

Publication status: Published

Journal: Quarterly Journal of Engineering Geology and Hydrogeology

Year: 2009

Volume: 42

Pages: 313-323

ISSN (print): 1470-9236

ISSN (electronic): 2041-4803

Publisher: Geological Society Publishing House

URL: http://dx.doi.org/10.1144/1470-9236/08-073

DOI: 10.1144/1470-9236/08-073

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