Performance of an Axial Flow Pump for Lake Destratification
A propeller pump was operated for 120 days on a lake of40 ha surface area in north-central Oklahoma in the summer of 1975 to accomplish artificial destratification. The pump created a downf/ow of welloxygenated surface water by means ofa 1.82 m diameter propeller located 1.8 m below the lake's surface. The pump produced a flow of 1.72 m3/sec, equivalent to 12.9% of total lake volume per day, at 17 rpm with a 1.0 h.p. electric motor. Four days of pumping eliminated thermal stratification, it raised the temperature of the hypolimnetic water 9.5C, but increased surface temperature less than...
