The Influence of Water-Column Mixing on Dissolved-Oxygen Concentrations and Saline Stratification in the River Tawe Barrage, Wales, UK |
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| Authors: | S L Taylor MSc H Morgan MCIEH K O'Hara PhD FIFM A Rutstein BSc K Thomas IEng |
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| Affiliation: | Environmental Health and Trading Standards Dept., City and County of Swansea, Swarisea, Wales, UK.;Technical Services Dept., City and County of Swansea, Swansea, Wales. UK.;Environmental Advice Centre Ltd., Mold, Flintshire, Wales, UK. |
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| Abstract: | The Tawe barrage was an early amenity barrage, and studies after its construction showed a deterioration in water quality within the impounded area. The main concern was the effect of low dissolved-oxygen concentrations upon the migrating salmonids during their passage upstream. An aeration/mixing system was chosen in a combination of diffusers and a propeller, which has proved to be capable of maintaining satisfactory water quality. However, additional diffusers need to be installed to (a) achieve a satisfactory concentration of dissolved oxygen at all points in the river and (b) complete the full scheme. |
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| Keywords: | Aeration barrage dissolved oxygen River Tawe salinity salmonids water-column mixing |
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