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The acre-foot is a non-SI unit of volume equal to about 1,233 m 3 commonly used in the United States in reference to large-scale water resources, such as reservoirs, aqueducts, canals, sewer flow capacity, irrigation water, [1] and river flows.
One acre equals 1 ⁄ 640 (0.0015625) square mile, 4,840 square yards, 43,560 square feet, [2] or about 4,047 square metres (0.4047 hectares) (see below).While all modern variants of the acre contain 4,840 square yards, there are alternative definitions of a yard, so the exact size of an acre depends upon the particular yard on which it is based.
Legally defined as 1.033 English feet in 1859 ≈ 0.314 858 m: foot (Clarke's) (H) ... acre-foot: ac ft ≡ 1 ac x 1 ft = 43 560 cu ft = 1 233.481 837 547 52 m 3:
This is a list of largest reservoirs in the United States, including all artificial lakes with a capacity greater than or equal to 1,000,000 acre-feet (1.2 km 3). Figures given are for maximum storage capacity (flood pool) of reservoirs, not regular storage volume (conservation pool).
On Dec. 1, the lake held 60,285 acre-feet of water. By Jan. 11, Lake Nacimiento had risen to 275,060 acre-feet. The water has continued to stream into the reservoir, and by Jan. 17 it hit a high ...
If you are growing rice in a wet area, it still takes an acre-foot of water to flood a 1 acre field to a depth of 1 foot. That's just the definition of the unit. Lieutenant pepper 16:41, 6 March 2014 (UTC) A one acre rice paddy naturally flooded with rainwater is not water consumption, though, and while its volume would indeed be an acre-foot ...
The only thing that changed was the number of feet and yards in a rod or a furlong, and the number of square feet and square yards in an acre. The definition of the rod went from 15 old feet to 16 + 1 ⁄ 2 new feet, or from 5 old yards to 5 + 1 ⁄ 2 new yards. The furlong went from 600 old feet to 660 new feet, or from 200 old yards to 220 ...
The 700,000-acre area is set to reopen at midnight Saturday unless officials extend the closure. The trails below will likely remain closed even when Angeles National Forest remains open.