Factors influencing exfiltration processes in sewers

Blackwood, David J. and Ellis, John Bryan and Revitt, D. Mike and Gilmour, D. J. (2005) Factors influencing exfiltration processes in sewers. Water Science and Technology, 51 (2). pp. 147-154. ISSN 0273-1223

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Abstract

Exfiltration from sewers is widespread and emerging legislation may require water service providers to identify, and rectify, its sources in sewerage systems. This paper describes exfiltration test apparatus and a series of experiments undertaken using sewage to gain a better understanding of the influence of sewage solids and sediments on leakage rates. An overview of the results obtained is given, which demonstrates that most previous estimates of exfiltration leakage rates were too high due to a lack of appreciation of the "self-repairing" action of sewage and sewage associated solids. Exfiltration rates of 0.1% of the sewer flow or 0.001 l/s have been recorded for defects up to 6 mm wide.

Item Type:Article
Research Areas:School of Science and Technology > Natural Sciences
Citations on ISI Web of Science:9
ID Code:3840
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Deposited On:25 Jan 2010 11:29
Last Modified:13 May 2014 15:51

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