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Title: Investigation of the impact on water quality of the SWW Teign estuary sewerage trenching activity
Author: C. Martin
Author: N. Babbedge
Document Type: Monograph
South West Water (SWW) are laying sewage pipelines along and across the Teign Estuary. The NRA considered it prudent to assess the extent of contamination relating to the turbid waters generated during digging and trenching in sediments known to be contaminated with metals and organic chemical species. Additionally, there were concerns that bacteria and viruses associated with the sediments might be released to the water column and therefore affect local shellfisheries. Construction of the pipeline is still progressing, and water quality surveys have been undertaken to monitor the inpact of operations at two of the four working sites identified for investigation. Further surveys are planned, to coincide with activity at the remaining sites. The concentrations of metals throughout the estuary in May 1992, during some trenching activity, have been compared with data collected by Wimpol in 1988 at the same sites. Levels in May 1992 were elevated in the upper estuary (at High Water).
Publisher: National Rivers Authority
Publication Date: 1992
Publication Place: Exeter
Subject Keywords: RiversWater qualitySiltConstructionPipesTurbidity
Geographic Keywords: EA South WestTeign EstuarySouth Devon catchmentDevon
Extent: 12; + figures, tables and appendices
Total file downloads: 5

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