||Induced Hypolimnion Aeration for Water Quality Improvement of Power Releases.
Leac, Lowell E. ;
Duffe, William R. ;
Harlin, J, Curtis C. ;
||Robert S. Kerr Water Research Center, Ada, Akla.
||EPA-WQO-16080-10/70; 06251,; 16080-10/70
( Reservoirs ;
( Thermoclines ;
( Water quality ;
Dissolved gases ;
Stream flow ;
Water pollution control
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Conventional hydraulic structures in most dams withdraw low flow and power releases from the poor quality hypolimnion waters during summer stratification resulting in serious degradation of long reaches of streams below dams. Induced aeration of hypolimnion waters during summer stratification has great potential in water quality management of power releases, low flow releases, and limited volumes of impoundments without costly modification of existing outlet works. Hypolimnion aeration research on power discharge quality improvement was conducted at Eufaula Reservoir in southeastern Oklahoma during the summer of 1968. Dissolved oxygen transfer efficiency of the aeration system ranged from 1.8 to 3.0 pounds of dissolved oxygen per horsepower-hour of expended energy resulting in an operating cost of 4.10 to 6.25 dollars per 1,000 pounds of oxygen incorporated into the power releases. Additional research for development and optimization of the induced aeration system is discussed. (Author)