Contaminant Ingress into Distribution systems (CID)

污染物进入配电系统 (CID)

• 批准号: EP/G015546/1
• 负责人: Joby Boxall
• 金额: $ 44万
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2009
• 资助国家: 英国
• 起止时间: 2009 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FG015546%2F1
• 关键词: Contaminant; Ingress; into; Distribution; systems

The quality of potable water is of vital importance to public health. However, contamination events are observed to occur even in the tiny volume (relative to total supply volume) of the samples collected for regulatory purposes. These events are often unexplained. A possible source of such contamination is pollutant ingress into the distribution system from the surrounding soil and water. Such ingress can occur through the many apertures normally associated with leakage, at times when low or negative pressure conditions occur such as due to hydraulic transients (water hammer).This project will investigate the currently unknown potential for such contaminant ingress into potable water distribution systems by direct measurement utilising a specially developed laboratory facility. Laboratory studies are necessary to address difficulties associated with the short response duration of transient events and the costs, complexity and regulatory unacceptability of field studies. The experimental set up will be full scale and include surrounding ground conditions and a contaminant flow field (for example, an adjacent leaky sewer). Initial studies will investigate the influence of the characteristics of the transients (magnitude, duration etc.) while further studies will investigate the influence of aperture shape, geometry and location.The experiments will provide quantitative evidence of the conditions causing ingress which will be used to develop a new ingress model which, together with existing modelling tools, will enable quantification of the potential for contaminant ingress. The outputs from the new modelling approach will inform improvements to distribution system design, operation and maintenance, management of pollution incidents and ultimately result in improved drinking water quality.The project will be undertaken at the University of Sheffield, with advice and support from Professor Bryan Karney of Toronto University, an international expert in transient analysis and in collaboration with Ecole Polytechnique de Montreal for access to the best currently available relevant field data.

饮用水的质量对公众健康至关重要。然而，观察到污染事件甚至发生在为监管目的收集的样品的微小体积（相对于总供应体积）中。这些事件往往无法解释。这种污染的一个可能来源是污染物从周围的土壤和水进入分配系统。当出现低压或负压条件时，例如由于水力瞬变（水锤），这种进入可能会通过通常与泄漏相关的许多孔发生。本项目将利用专门开发的实验室设施，通过直接测量，调查目前未知的这种污染物进入饮用水分配系统的可能性。实验室研究是必要的，以解决与瞬态事件的反应时间短，现场研究的成本，复杂性和监管不可接受的困难。实验装置将是全尺寸的，包括周围的地面条件和污染物流场（例如，相邻的泄漏下水道）。初步研究将调查瞬变特性（幅度、持续时间等）的影响。进一步的研究将调查孔的形状、几何形状和位置的影响。实验将提供导致进入的条件的定量证据，这些证据将用于开发新的进入模型，该模型与现有的建模工具一起，将能够量化污染物进入的可能性。新的模拟方法的结果将为改善分配系统的设计、运行和维护、污染事件的管理提供信息，并最终改善饮用水质量。该项目将在谢菲尔德大学进行，多伦多大学的Bryan Karney教授提供建议和支持。瞬态分析方面的国际专家，并与蒙特利尔理工学院合作，获取当前可用的最佳相关现场数据。

项目成果

Influence of Ground Conditions on Intrusion Flows through Apertures in Distribution Pipes

• DOI: 10.1061/(asce)hy.1943-7900.0000719
• 发表时间: 2013-10-01
• 期刊: JOURNAL OF HYDRAULIC ENGINEERING
• 影响因子: 2.4
• 作者: Collins, Richard;Boxall, Joby
• 通讯作者: Boxall, Joby

Intrusion and leakage through cracks and slits in plastic (MDPE) pipes

通过塑料 (MDPE) 管道中的裂缝和缝隙侵入和泄漏

• 发表时间: 2012
• 作者: Collins RP

Contaminant Ingress and Transient Monitoring

污染物进入和瞬态监测

• 发表时间: 2012
• 作者: Collins RP

Derivation and Validation of a Leakage Model for Longitudinal Slits in Polyethylene Pipes

聚乙烯管纵向缝隙泄漏模型的推导和验证

• DOI: 10.1061/(asce)hy.1943-7900.0001469
• 发表时间: 2018
• 期刊: Journal of Hydraulic Engineering
• 影响因子: 2.4
• 作者: Fox S

Contaminant Ingress into Distribution Systems

污染物进入配电系统

• 发表时间: 2009
• 作者: Collins R