Modelling both the continual erosion and regeneration of discolouration material in drinking water distribution systems

The erosion of the cohesive layers of particulate matter that causes discolouration in water distribution system mains has previously been modelled using the Prediction of Discolouration in Distribution Systems (PODDS) model. When first proposed, PODDS featured an unvalidated means by which material...

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Bibliographic Details
Published in:Water science & technology. Water supply 2014-01, Vol.14 (1), p.81-90
Main Authors: FURNASS, W. R, COLLINS, R. P, HUSBAND, P. S, SHARPE, R. L, MOUNCE, S. R, BOXALL, J. B
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Coding
Computation methods. Tables. Charts
Computer simulation
Discoloration
Distribution
Distribution. Storage
Drinking water
Erosion
Exact sciences and technology
Formulations
Laboratories
Mass transport
Mathematical models
Modelling
Particulate matter
Regeneration
Regeneration (biological)
Sensitivity analysis
Structural analysis. Stresses
Suspended particulate matter
Systems analysis
Water distribution
Water distribution systems
Water engineering
Water management
Water supply. Pipings. Water treatment
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Summary:The erosion of the cohesive layers of particulate matter that causes discolouration in water distribution system mains has previously been modelled using the Prediction of Discolouration in Distribution Systems (PODDS) model. When first proposed, PODDS featured an unvalidated means by which material regeneration on pipe walls could be simulated. Field and laboratory studies of material regeneration have yielded data that suggest that the PODDS formulations incorrectly model these processes. A new model is proposed to overcome this shortcoming. It tracks the relative amount of discolouration material that is bound to the pipe wall over time at each of a number of shear strengths. The model formulations and a mass transport model have been encoded as software, which has been used to verify the model's constructs and undertake sensitivity analyses. The new formulations for regeneration are conceptually consistent with field and laboratory observed data and have potential value in the proactive management of water distribution systems, such as evaluating change in discolouration risk and planning timely interventions.
ISSN:1606-9749
1607-0798
DOI:10.2166/ws.2013.176