Reminds me of this IRL wank I got to listen to at the zoo. You know many zoo exhibits these days use ponds instead of dry moats as a barrier to keep their animals in the exhibits? They look natural, provide habitats for wild animals, etc. Apparently that does not mitigate the fact that water evaporates off them. (to clarify, I live in Portland, Oregon. A 'water shortage' around here means the grass might get a bit yellow in the summer)