Chloride in the Chalk aquifer of East Anglia, UK, Part 1: Distribution of chloride in brackish and saline groundwater

Quarterly Journal of Engineering Geology and Hydrogeology, Journal Year: 2024, Volume and Issue: 58(1)

Published: Oct. 25, 2024

The Chalk aquifer of East Anglia is heavily exploited as a groundwater source. During exploration and exploitation, it has become clear that some the in brackish unsuitable for drinking (>250 mg l −1 chloride). Data comprising chemical analyses pumped water samples borehole depth (more than 900 results total), downhole geophysical surveys have been used to assemble maps distribution chloride areally with depth. Brackish or saline probably present at Chalk, even where shallow freshwater present, over much area Crag Group marine sediments deposited. below surface which encountered varies between 50 more 100 m, elevation transition from −91 +16 m above ordnance datum (AOD). From its chemistry, deduced most ancient origin but there localized intrusion modern seawater coastal areas, especially around Ipswich. Saline entered during times (late Pliocene–early Pleistocene) chemistry modified subsequently. old full salinity.

Language: Английский

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Editorial 2025

Quarterly Journal of Engineering Geology and Hydrogeology, Journal Year: 2025, Volume and Issue: 58(1)

Published: Feb. 3, 2025

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Regional controls on the hydrochemistry of the Chalk aquifer of East Anglia, UK

Journal of Hydrology Regional Studies, Journal Year: 2025, Volume and Issue: 59, P. 102383 - 102383

Published: April 18, 2025

Language: Английский

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