A method of designing a stratified cooling channel for managing the ex
cess heat of a thermal discharge is presented. The cooling channel is
connected to a larger body of water such as a river, lake, or ocean. A
continuous exchange flow with a larger body of water allows mixing to
play an important role in reducing the temperature of a discharge in
the cooling channel. The equations governing the now and temperature i
n a deep cooling channel are derived from basic principles of momentum
and heat balance. The numerical solutions show that most of the therm
al impact of a heated discharge may be confined to within the boundari
es of the cooling channel, minimizing the ecological impact on the nat
ural environment. An example is used to demonstrate the method of desi
gning a cooling channel. The example shows that cooling channels could
operate under thermal loading conditions significantly higher than th
ose required in cooling ponds.