Skip to main content


Title: Investigation into potential storm sewage discharge movements during spring and neap tides from Sharkham Point storm overflow
Author: S. Hunter
Document Type: Monograph
Annotation: EA additional title info: devon area internal report: DEV/EP/15/99 (Catchment 06A)
Regional Tidal Water Quality (RTWQ) requested Devon Area Investigations undertake two surveys to identify the tidal movement of potential storm sewage discharges from Sharkham point outfall chamber during spring and neap tides. Sharkham Point is situated on the southern side of Torbay in South Devon. The outfall chamber is located on a rocky outcrop at the base of the cliff. The storm overflow consists of a square opening in the side of the chamber with horizontal bar screens approximately 100mm apart. Access is via ladders permanently secured to the cliff face. At present the flow through the chamber is one third that expected on completion of the Torbay Marine Scheme. The outfall will also have a diffuser added that could result in some head loss. During the highest astronomical tide the outfall will be at capacity and spillage may occur at the chamber. Additional storm flows to the chamber can also arrive from the new Bolton Street Combined Sewer Overflow (CSO) that discharges to the tunnel sewer. The period of risk to the St. Marys Bay EC Bathing Water could therefore be extended when both the tidal surge and storm water effects are taken into account.
Publisher: Environment Agency
Publication Date: 1999
Publication Place: [Exeter]
Subject Keywords: SewageWater qualityDischarge (hydrology)Water quality surveysTidesCoastsStorms
Geographic Keywords: Sharkham PointTorbay (Devon)DevonSouth Devon catchment
Extent: 30
Total file downloads: 312

Download PDF    Display PDF in separate tab