noun (plural acre-feet)
A unit of volume equal to the volume of a sheet of water one acre (0.405 hectare) in area and one foot (30.48 cm) in depth; 43,560 cubic feet (1233.5 cubic metres).
- At $5 to $15 for an acre-foot (enough water to cover an acre of ground with a foot of water), farmers are able to grow water-intensive crops such as alfalfa, cotton, and rice.
- About 27 million acre-feet of water (8.5 trillion gallons, to be somewhat more precise), backed up behind 580-foot Glen Canyon Dam.
- Dams less than 10 feet in height and having a storage capacity of not more than 50 acre-feet of water.
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