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Hydraulic conditioning to manage potable water discolouration

Lookup NU author(s): Professor Catherine BiggsORCiD



This is the authors' accepted manuscript of an article that has been published in its final definitive form by I C E Publishing, 2017.

For re-use rights please refer to the publisher's terms and conditions.


Results are reported from studies conducted using a unique laboratory-based, full-scale, temperature-controlled pipefacility to examine the impact of conditioning shear stress on discolouration risk, as characterised by bulk watersamples (turbidity, iron and manganese) and biofilm pipe wall measurements. The facility uniquely allowed forreplication of the dynamics of an operational network but with rigorous control, thus yielding fully representativeresults overcoming the limitations of bench-scale or operational studies. The effect of the daily variation in flow (andboundary shear stress) was observed to be greater than the effect of the average daily flow rate at reducingdiscolouration risk. This is useful for informing operation and maintenance strategies, specifically that regularlyimposing cycles of flow variation are more effective than increasing total average flow rates at limiting discolourationrisk. The application of such knowledge aids the development of cost-effective, proactive, operational interventions tomanage discolouration.

Publication metadata

Author(s): Sharpe RL, Biggs CA, Boxall JB

Publication type: Article

Publication status: Published

Journal: Proceedings of the Institution of Civil Engineers - Water Management

Year: 2017

Volume: 172

Issue: 1

Pages: 3-13

Online publication date: 14/01/2019

Acceptance date: 05/09/2017

Date deposited: 28/03/2019

ISSN (print): 1741-7589

ISSN (electronic): 1751-7729

Publisher: I C E Publishing


DOI: 10.1680/jwama.16.00038


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