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The Influence of Water‐Column Mixing on Dissolved‐Oxygen Concentrations and Saline Stratification in the River Tawe Barrage, Wales, UK
Author(s) -
Taylor S. L.,
Morgan H.,
O'Hara K.,
Rutstein A.,
Thomas K.
Publication year - 2002
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/j.1747-6593.2002.tb00374.x
Subject(s) - environmental science , stratification (seeds) , water quality , aeration , water column , hydrology (agriculture) , mixing (physics) , environmental engineering , geology , oceanography , waste management , geotechnical engineering , ecology , engineering , seed dormancy , botany , germination , physics , quantum mechanics , dormancy , biology
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.