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Recent Developments in Oxygenation of the Tidal Thames
Author(s) -
LLOYD P. J.,
WHITELAND M. R.
Publication year - 1990
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.1747-6593.1990.tb01565.x
Subject(s) - environmental science , oxygenation , surface runoff , drainage , sewage , combined sewer , hydrology (agriculture) , environmental engineering , stormwater , engineering , geotechnical engineering , medicine , ecology , biology , anesthesia
Increased polluting loads are discharged to the tidal Thames at times of heavy rainfall. This can lead to a rapid decline in dissolved‐oxygen (DO) concentrations, which, on occasions, has resulted in fish mortality. The problem is caused by the cumulative effect of surface runoff, increased flows from sewage‐treatment works, and storm‐sewage discharges from the combined drainage of Inner London. An experimental system of in‐river oxygenation has been operated by Thames Water in order to alleviate the problem. This scheme demonstrated that the river oxygenation concept is viable. There was, however, a need to increase the operating reliability of the plant and to provide extra oxygenation capacity. Thames Water carried out a detailed investigation into the various options prior to the acquisition of a new, purpose‐built, self‐propelled, oxygenation vessel, which was delivered to the River Thames in October 1988.