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The purpose of aeration in lake management is to increase
the dissolved oxygen content of the water. Various systems
are available to help do this by either injecting air, mechanically
mixing or agitating the water, or even injecting pure oxygen.
Aeration can increase fish and other aquatic animal habitat,
prevent fishkills, and improve the quality of domestic and
industrial water supplies and decrease treatment costs. In
some cases, nuisance algal blooms can be reduced or a shift
to less objectionable algae species can occur. However, aeration
can be misused. It is not a "cure-all" for a lake's ills.
It's important to understand what aeration can and can't do
for your lake so you don't end up with unexpected or unwanted
results and possibly a waste of money.
This issue in the Lake Notes series focuses on artificial
circulation as a lake aeration technique. We'll explore its
applicability, potential consequences, and other factors to
be considered before deciding to invest in an artificial circulation
system or in reevaluating the system you already have in place.
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