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Case history of a dewatering and recharge system in chalk

Powrie, W. and Roberts, T.O.L. (1995) Case history of a dewatering and recharge system in chalk Geotechnique, 45, (4), pp. 599-609. (doi:10.1680/geot.1995.45.4.599).

Record type: Article


The paper describes the performance of a dewatering and groundwater recharge system for a large excavation in chalk. The assessment of the effective bulk permeability of the chalk, and the probable hydraulic boundary conditions are discussed. The measured extraction and recharge flow rates, and the porewater pressures in certain locations, are in reasonable agreement with those calculated using a simple flownet analysis. The influence of groundwater chemistry on the effectiveness of the dewatering system is discussed with reference to an incident towards the end of the pumping period which led to the clogging of the pumps due to calcium carbonate precipitation following a rise in the pH of the groundwater.

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More information

Published date: December 1995
Keywords: basements, case history, chalk, chemical properties, groundwater, permeability
Organisations: Civil Engineering & the Environment


Local EPrints ID: 75697
ISSN: 0016-8505
PURE UUID: 16190412-b5a2-4a45-b6c2-adeb7ff7e651
ORCID for W. Powrie: ORCID iD

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:42

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