The use of groundwater age indicators in risk assessment to aid water supply operational planning

Morris, Brian; Stuart, Marianne; Darling, George; Gooddy, Daren. 2005 The use of groundwater age indicators in risk assessment to aid water supply operational planning. Water and Environment Journal, 19 (1). 41-48. 10.1111/j.1747-6593.2005.tb00547.x

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Groundwater residence-time survey results on 21 public water supplies in the chalk aquifer in southern England are compared with a previous Cryptosporidium risk assessment which was carried out on the same supplies for regulatory-compliance purposes in 1999. The results indicate that residence-time indicators could provide useful corroborative evidence for rapid recharge hazard - not only in those settings already identified by microbiological surveillance, but also in the more difficult-to-identify situation where potential rapid pathways have been identified but the bacteriological indicators are negative or ambiguous. However, groundwater-mixing processes under pumping conditions are complex, especially in the chalk, and will always require interpretation informed by an understanding of the local hydrogeological and operational setting.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1111/j.1747-6593.2005.tb00547.x
Programmes: BGS Programmes > Other
ISSN: 1747-6585
Additional Keywords: Groundwater, Risk assessment, Water supply, GroundwaterBGS, Groundwater dating
NORA Subject Terms: Earth Sciences
Related URLs:
Date made live: 05 Nov 2008 15:31 +0 (UTC)

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