Numerical Modelling Means for the Fight against Eutrophication of Lakes: Artificial Destratification and Selective Racking

The object of this work is to test two applications: Artificial destratification and Selective Racking to fight the eutrophication of lake. For this we consider a jet described by the equations of Navier stocks whose resolution is based on the finite difference method. For the first treatment (artificial Destratification), the idea is to consider a rectangular area filled with water, and start the jet from the bottom to the surface. For the second treatment (selective Racking), it considers another rectangular field full of water, but the jet will now be on the left lateral border into the hole located in the right side border.