Acre-foot

An acre foot 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.
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Noun
1. the volume of water that would cover 1 acre to a depth of 1 foot; 43,560 cubic feet or 1233.5 cubic meters
(hypernym) volume unit, capacity unit, capacity measure, cubage unit, cubic measure, cubic content unit, displacement unit, cubature unit

The volume of water that would cover one acre of land (43,560 square feet) to a depth of one foot, equivalent to 325,851 gallons of water. An acre-foot is the basic measure of agricultural water use. On average, irrigators apply almost 2 feet of water on each acre through the crop growing season; the amount ranges from 4 feet in the Southwest to a half foot in some eastern states. Water withdrawn for irrigation from ground and surface sources totals about 150 maf (million acre-feet) of water annually.
  

UN PIEDE D'ACQUA PER ACRO [= 1233.5 M CUBI]

Eng: acre-foot
Urdu: ایکَڑ فِٹ ۔ ایک ایکَڑ کو ایک فِٹ گہرائی تَک بھَرنے کے لِیے پانی کی مِقدار ۔