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  2. Acre-foot - Wikipedia

    en.wikipedia.org/wiki/Acre-foot

    Since an acre is defined as a chain by a furlong (i.e. 66 ft × 660 ft or 20.12 m × 201.17 m), an acre-foot is 43,560 cubic feet (1,233.5 m 3). There has been two definitions of the acre-foot (differing by about 0.0006%), using either the international foot (0.3048 m) or a U.S. survey foot (exactly ⁠ 1200 / 3937 ⁠ meters since

  3. Acre - Wikipedia

    en.wikipedia.org/wiki/Acre

    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.

  4. Talk:Acre-foot - Wikipedia

    en.wikipedia.org/wiki/Talk:Acre-foot

    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 ...

  5. Furlong - Wikipedia

    en.wikipedia.org/wiki/Furlong

    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 ...

  6. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    Definition ≡ exactly equal ≈ approximately equal to ≘ (exactly) corresponds to (different types of quantity describing the same phenomenon) digits: indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369...) (H) of chiefly historical interest

  7. California reports the first increase in groundwater supplies ...

    www.aol.com/news/california-reports-first...

    The state saw 4.1 million acre-feet of managed groundwater recharge in the water year ending in September, and an 8.7 million acre-feet increase in groundwater storage, California’s Department ...

  8. English units - Wikipedia

    en.wikipedia.org/wiki/English_units

    The rod is the same length today as in Anglo-Saxon times, although its composition in terms of feet were changed by the Composition of Yards and Perches from 15 feet to 16 + 1 ⁄ 2 feet or 5 + 1 ⁄ 2 yards. The pole is commonly used as a measurement for Allotment gardens. (See also perch as an area and a volume unit.) Chain: 20.116 m: Four ...

  9. California could lose up to 9 million acre-feet of water by ...

    www.aol.com/california-could-lose-9-million...

    By 2050, California is expected to lose between 4.6 and 9 million acre-feet of its annual water supply. In other words, by 2050 at the latest, Californians would lose access to a volume of water ...