Need for New Standards to Prevent Deposition in Wastewater Sewers
Publication: Journal of Environmental Engineering
Volume 120, Issue 5
Abstract
Both self‐cleansing‐velocity and minimum‐shear‐stress approaches have been used to investigate the effect of the relative flow depth in a sewer as an important factor influencing the buildup of deposits in a sewer designed for full flow. Each of the approaches indicates favorable deposit‐free flow conditions for sewers with relative‐normal flow depths ranging between 0.5 and 1.0. For relative flow depths well below 0.5 the same sewers show a strong tendency to form deposits. Nomographs have been developed for circular sewers partially clogged by deposits for easier computations of flow depths. Shear stresses in partially clogged sewers have been computed and discussed in relation to deposit thickness; the study here is limited to initiation criterion only.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 120 • Issue 5 • September 1994
Pages: 1032 - 1042
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Dec 7, 1992
Published online: Sep 1, 1994
Published in print: Sep 1994
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