“How much water does one of those collect, anyway?”
I just learned they were a ‘thing’ so I am pinging the expert on them for you. :)
I think I could have collected many gallons if I had one mounted on the roof of the car for my morning commute here lately.
There are so many factors in play that it’s hard to pin down an exact number. One company that makes mesh collectors says that in one location, their mesh can catch up to 22 liters per square meter, per day. Fog harps can collect 20 times more than fog nets, so that could mean 440 liters, or roughly 116 gallons, per square meter per day. But, those numbers are estimates. It depends on the density of the fog, ambient temperatures, etc.
I would probably focus more on dew than fog, so the dew point and humidity levels would be important factors. I’ve been collecting pieces to build fog harps out of, but haven’t actually put one together yet. My design for a prototype uses fishing line instead of wire, and uses zippers to maintain the spacing between filaments. I also need a way to protect it from high winds, which are a constant hazard on my farm, because the way the hills around me are situated, I’m basically at the end of a giant wind tunnel.
But, even on hot dry days, the dew on my farm in the mornings is so thick you could drown in it, so I figure there’s got to be a way to make use of that.