Acre-Foot [acยทft]
The acre-foot is a unit of volume commonly used in the United States to measure large quantities of water, especially in agriculture and water resource management.
One acre-foot equals the volume of water that would cover one acre of land to a depth of one foot.
Summary:
Used mainly for measuring water in reservoirs, irrigation, and lakes
Represents a large volume suitable for water management
Equal to the volume covering one acre to a depth of one foot