Floating PV can support the water below!

Of course, it helps to reduce evaporation in reservoirs. But not only.

4CSOLAR integrates solutions for water aeration and against sedimentation in dams:
Autnomous water aeration device
Ideal for lakes
Integrated in a grid connected array
Autonomous water aeration device
Autonomous water aeration for lakes
Water aeration and solar array
Water aeration for dams
Water Aeration for lakes:
Solving sedimentation in water dams:
Dams generate sedimentation
Some solutions are usually applied
But they are expensive
Sediments can be evacuated
Partial sediment release is enough
The turbine is not damaged