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Title: An investigation into the effects of Woking STW on the River Wey
Author: Jon Goddard
Document Type: Monograph
The River Wey at Newark Lane failed to meet its RQO of IB for Ammoniacal Nitrogen in 1990. Woking STW discharging upstream of Newark Lane, is the main contributor of high ammonia concentrations in the river. Archive data for the STW and river were examined to identify historical changes that have taken place and 3 surveys were carried out to determine diel range of Ammoniacal Nitrogen discharging from the STW and in the river. Woking STW was found to be operating near to its consent limits and Local Authority information indicates it is approaching its design capacity in terms of catchment population. The STW discharges to one branch of a multi-channelled system and so some consideration with given to the diversion of river flow and dilution of the effluent. It appears that most of the flow (approximately 57%) travels down the main channel into which the STW discharges. The additional dilution provided by the navigation channel below the confluence does not appear to significantly reduce ammoniacal nitrogen concentrations. Although the river is unable to achieve its RQO of IB, in general water quality supports the rivers present uses. Even so, extra capacity is needed at the STW to stop the effluent deteriorating with increasing catchment population size.
Publisher: National Rivers Authority
Publication Date: 1992
Publication Place: Guildford
Subject Keywords: SewageWater qualityRiversAmmonium compounds
Geographic Keywords: Wey (Surrey)Wey catchmentSurrey
Extent: n.p. [51]
Total file downloads: 306

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