Wiktionary
acre foot
n. (context US engineering agriculture English) A unit of measure, used for volumes of water, equal to one acre times one foot (that is, to the amount of water required to cover one acre of land to a depth of one foot), which is 43,560 cubic feet, 325,851 gallons, 1,233 cubic meters.Colorado Foundation for Water Education, ISSN 1546-0584.
Usage examples of "acre foot".
Projections put the paying sandbar at two thousand barrels per acre foot.