Lookup NU author(s): Professor Catherine Biggs
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.
Author(s): Sharpe RL, Biggs CA, Boxall JB
Publication type: Article
Publication status: Published
Journal: Proceedings of the Institution of Civil Engineers - Water Management
Online publication date: 14/01/2019
Acceptance date: 05/09/2017
ISSN (print): 1741-7589
ISSN (electronic): 1751-7729
Publisher: I C E Publishing
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