One a cold February morning, as I was trying to reach Quemao Viejo on my motorbike, I found the place hidden under a dense cloud. I had to turn around, and wait for a better day to do some work. Days later I thought, well, there is no water In Quemao Viejo, but sure it is not a dry area! It would be great to be able to capture this water …
I started researching on Internet. The information about fog collection was massive. Many people around the world already had the same idea and were working on it, successfully! So, another way to get water!
The technical explanation lay on a process known as condensation. Atmospheric water vapour condenses on cold surfaces (like leafs in the morning) and forms droplets of water, known as dew. This is possible because the surface where moisture condenses is cold as it radiates heat into the air. Naturally, it only happens at sunrise, when the sun starts heating up the air, but not enough to evaporate the droplets.
Here are some photos and links about fog collection. Just to give you an idea. The amount of information on internet is huge. From air wells , stone mulch in the Canary Islands, to atmospheric water generator, that use heat to cool down surfaces where the moisture will condense. I even found a video of a guy collecting dew water by tying a piece of fabric to a rope, dragging it across a grass field and squeezing it when damp enough. He got about two litters in a morning! And I am not going to mention the hole in the floor, the plastic, the bucket and the stone in the middle, aka solar still…you all know that already!!
More sophisticated fog collectors are now being developed:
And it can be so wrong, because some guys were doing it a while ago:
Nice webs with more info: