As a big proponent of the metric system, acre feet are pretty reasonable. An acre is a decent sized plot of land for a house in the ~dense country, you can easily picture it. Flood that to a foot and you have an acre foot.
A single m^3 is fairly easy to visualize, but once you get to higher amounts it's pretty meaningless.
A single m^3 is fairly easy to visualize, but once you get to higher amounts it's pretty meaningless.