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Acre-Foot [ac·ft]

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.

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  1 acre-foot = 43,560 cubic feet ≈ 1,233.5 cubic meters ≈ 325,851 gallons

  
  

Summary:

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  Used mainly for measuring water in reservoirs, irrigation, and lakes

  
  
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  Represents a large volume suitable for water management

  
  
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  Equal to the volume covering one acre to a depth of one foot