The largest of the dams supplying Cape Town (Theewaterskloof) has a massive surface area (around 5000 ha). Given that the area also tends to be very windy due t

The largest of the dams supplying Cape Town (Theewaterskloof) has a massive surface area (around 5000 ha). Given that the area also tends to be very windy due to its altitude and the prevailing South Easter that blows right throughout summer, evaporation must be really high. Also desalination is energy intensive. For political reasons I'm pretty sure this would be impossible, but I wonder how practical it would be to cover it with solar panels and use the energy for desalination.