Impact of hydraulic interventions on chronic and acute material loading and discolouration risk in drinking water distribution systems
| Autor: | Joby Boxall, I. Sunny, P.S. Husband |
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| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Mains electricity 0208 environmental biotechnology 02 engineering and technology 010501 environmental sciences 01 natural sciences Distribution system Downstream (manufacturing) Water Supply Water Quality Waste Management and Disposal Short duration Risk management 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering business.industry Ecological Modeling Drinking Water Environmental engineering Bulk water Pollution Trunk 020801 environmental engineering Environmental science Water quality business |
| Zdroj: | Water research. 169 |
| ISSN: | 1879-2448 0043-1354 |
| Popis: | This paper presents results from an intensive long term investigation in three comparable trunk mains and downstream impact of non-invasive, in-service flow conditioning to manage discolouration risk. Findings show that flow conditioning, the careful regular increase in flows to mobilise small amounts of material from cohesive layers formed at the pipe wall, provides immediate risk mitigation and system resilience benefits. Evidence is presented showing longer term risk reduction in the trunk mains and a 25% discolouration risk reduction in the downstream networks. Whilst the flow conditioning produced an acute but short duration controlled mobilisation of material from the trunk main, longer term downstream monitoring showed reduced chronic or background material loading. It is proposed this change is due to altering the material exchange behaviour and volumes bound within cohesive layers that develop on bulk water/infrastructure interfaces. The paper provides evidence that flow conditioning is an efficient strategy to manage discolouration risk and improve consumer water quality throughout water distribution systems. |
| Databáze: | OpenAIRE |
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