Acre-foot
Acre-foot
Acre-foot (pronunciation: /ˈeɪkərˌfʊt/) is a unit of volume commonly used in the United States in reference to large-scale water resources, such as reservoirs, aqueducts, canals, sewer flow capacity, and river flows.
Etymology
The term "acre-foot" comes from the United States customary units. It is a unit of volume that covers one acre (a unit of area) to a depth of one foot (a unit of length). Therefore, one acre-foot is defined as the volume of one acre of surface area to a depth of one foot.
Definition
An acre-foot is defined as the volume of one acre of surface area (66 feet by 660 feet) to a depth of one foot. In other words, it is equivalent to exactly 43,560 cubic feet, approximately 325,851 gallons, or approximately 1,233 cubic meters.
Related Terms
- Cubic foot: A unit of volume in the imperial and U.S. customary measurement systems.
- Cubic meter: The SI derived unit of volume. Its SI symbol is m³. It is the volume of a cube with edges one meter in length.
- Gallon: A unit of volume for liquid measure in both the US customary units and the British imperial systems of measurement.
- Acre: A unit of land area used in the imperial and US customary systems. It is traditionally defined as the area of one chain by one furlong (66 by 660 feet), which is exactly equal to 10 square chains, 1⁄640 of a square mile, or 43,560 square feet, and approximately 4,047 m², or about 40% of a hectare.
External links
- Medical encyclopedia article on Acre-foot
- Wikipedia's article - Acre-foot
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