We measure our land in acres and water is the limiting resource for using it. Water requirements for crops are expressed in feet/year (or inches/day). Combine the two and you get acre-feet.
m^3 would be a less useful unit in terms of calculating water needs out here, the metric equivalent would be hectare-meters (10,000 m^3).
We measure our land in acres and water is the limiting resource for using it. Water requirements for crops are expressed in feet/year (or inches/day). Combine the two and you get acre-feet.
m^3 would be a less useful unit in terms of calculating water needs out here, the metric equivalent would be hectare-meters (10,000 m^3).