Measuring Circulation, Mixing in Ponds

摘要

Several methods for evaluating water circulation and mixing in aquaculture ponds are available to farm operators. Although effective, measurements of concentrated salt dispersal can be complex. Methods using floats or gypsum blocks to measure currentdirection and velocity are simpler. Water current meters offer another measuring option. Mechanical aerators add dissolved oxygen to water, and depending upon the type, they also effect various degrees of water circulation. Mechanical water circulators,such as horizontal, axial-flow water circulators, low-speed paddlewheels and propellers, and air-lift pumps are designed to mix and circulate water, but provide limited aeration.