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, and river flows. GEE GUY dimensions is called content. ... Gelmersee is a reservoir in Switzerland. ... Pont du Gard, France, a Roman aqueduct built circa 19 BC. It is one of Frances top tourist attractions and a World Heritage Site. ... The Canal du Midi in Toulouse, France. ...
Definition
It is defined by the volume of water necessary to cover one acre of surface area to a depth of one foot. It is equal to exactly 43,560 cubic feet, or nearly 325,851 U.S. gallons, or approximately 1233.48 cubic meters. An acre is an English unit of area, which is also frequently used in the United States and some Commonwealth countries. ... The gallon (abbreviation: gal) is an English unit of volume. ...
Discussion
As a rule of thumb in U.S. water management, one acre foot is taken to be roughly the amount of water used annually by a family of four (844.8 liters of water, per person, per day). The acre foot (or more specifically the time rate unit of acre foot per year) has been used historically in the U.S. in many water-management agreements, for example the Colorado River Compact, which divides 15 million acre feet per year (586 m³/s) among seven western U.S. states. The Colorado River Compact is a 1922 agreement among seven U.S. states in the basin of the Colorado River in the American Southwest governing the allocation of the rivers water among the parties of the interstate compact. ... A state of the United States (a U.S. state) is any one of the fifty states (four of which officially favor the term commonwealth) which, along with the District of Columbia, form the United States of America. ...
The U.S. customary units definition of the acre in NIST Handbook 44 is 43,560 square feet.
The acre was selected as approximately the amount of land tillable by one man behind an ox in one day; its name comes from ager, the Latin for "field".
The league is equivalent to 4,428 acres and the Labor to 177 acres.
In metric units, an acre is approximately 0.4047 hectare; to a good enough approximation for many purposes, it can be taken as 0.40 hectare or 4.0 km²/1000 acres.
The acre was selected as approximately the amount of land tillable by one man behind an ox in one day.
An acre-foot is a measure of volume used to measure large volumes of water, an acre-foot being the volume necessary to cover one acre to a depth of one foot, 43,560 cubic feet (1233.5 cubic meters or 325 850 U.S. gallons).
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