Would it work/be practical to build a desalination system in a place that has high mountains near coastal areas? In places like the Atlas mountains of Africa and the Andes in Chile which are near coasts & deserts yet high enough to be snowcapped it may be ideal. Water could be brought to the top of the mountain via a close valved siphon system relying partially on solar powered pumps to move water from sealed tank to sealed tank each incrementally higher up the mountain. Once above the snowline the water would be allowed to freeze over, separating fresh from brine. The ice would be mechanically removed and sent down the mountain via chutes. The seperation tank would then be sealed and a valve opened allowing the brine to flow out into a closed system similar to that which raised the water up the mountain. The resulting vacuum would assist the solar powered inflow system.