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Stormwater Management

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file icon Pollutants retention in stormwater treatment chambershot! 08/24/2004
Authors
D.A. Phipps, R.M. Alkhaddar and M.G. Faram
Abstract
In recent years, various proprietary treatment technologies have evolved to reduce the polluting impact of urban run-off on receiving watercourses. The majority are ‘flow-through’ devices, designed to intercept and store pollutants in submerged chambers for later removal and safe disposal. Frequently, the performance of such systems is described solely in terms of ‘ability to remove pollutants from the inflow’, usually at specified discrete flowrates. However, it is suggested that this is insufficient to give a true assessment of performance and a critical parameter that is often overlooked is chamber ‘retention efficiency’, the ability of a chamber to retain stored pollutants once collected. In the current study, this parameter is investigated experimentally for a range of chamber configurations. Cylindrical chambers with different inlet orientations, internal components and hence flow dynamics are considered. The study identifies retention efficiency as being a major differentiator between designs, and concludes that chambers in which captured pollutants are stored in regions that are hydraulically isolated from the main treatment area are likely to be the most effective in practice.
file icon Physical characterisation and hydrograph response modelling of vortex flow controlshot! 09/16/2008
Authors
J. P. LeCornu, M. G. Faram, D. S. Jarman,
file icon PHYSICAL AND CHEMICAL CHARACTERIZATION OF SEDIMENTS CAPTURED BY FLOW-THROUGH STORMWATER INTERCEPTORShot! 08/16/2007
Authors
Kwabena Osei,
file icon Laboratory and Field Tests of the Up-Flo Filterhot! 09/16/2008

Authors: Robert Pitt, Uday Khambhammettu, Robert Andoh, Lisa Lemont, Kwabena Osei, and Shirley E. Clark

Abstract:

file icon Innovative approaches to urban stormwater managementhot! 08/24/2005
Authors
M.G. Faram, R.Y.G. Andoh and C.A. Williams
Abstract
‘Engineered’ or ‘hard’ structure based SuDS (Sustainable (Urban) Drainage Systems) have become popular in recent years, presenting further options to the drainage engineer beyond some of the more conventional approaches. However, as with any approach, correct design practice must be applied if systems are to be effective and maintainable.

Robust management of sediments is a prerequisite for the successful operation of any drainage system. If not adequately managed, sediments will accumulate in undesirable locations, making maintenance difficult, and will pass on to receiving watercourses, presenting a pollution threat.

The paper considers best practice in the design and linking together of ‘hard’ SuDS components, specifically storage systems and sediment interceptors. It is concluded, based on the outputs of recent studies, that an optimal system will incorporate a storage chamber with designed-in sediment transfer facilities, feeding onward to well-designed flow control and sediment capture facilities.

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