Shadoof: Difference between revisions
shadoof |
No edit summary |
||
| Line 20: | Line 20: | ||
With an almost effortless swinging and lifting motion, the waterproof vessel is used to scoop up and carry water from one body of water (typically, a river or pond) to another. At the end of each movement, the water is emptied out into runnels that convey the water along irrigation ditches in the required direction. |
With an almost effortless swinging and lifting motion, the waterproof vessel is used to scoop up and carry water from one body of water (typically, a river or pond) to another. At the end of each movement, the water is emptied out into runnels that convey the water along irrigation ditches in the required direction. |
||
It is estimated that a |
It is estimated that a shaduf can raise over 2,500 litres per day. |
||
Josh Tam loves Megan. |
|||
==References== |
==References== |
||
good bye mr poo plz dont poo on me |
good bye mr poo plz dont poo on me |
||
Revision as of 15:19, 11 March 2008
A shadoof or shaduf (an Arabic word) is an irrigation tool. A less common English translation is swape.[1]
It was originally developed in ancient Mesopotamia, and occurs on a Sargonid seal of c.2000 BC.[2] It is still used in many areas of Africa and Asia to draw water.
The shadoof consists of an upright frame on which is suspended a long pole or branch, at a distance of about one-fifth of its length from one end. At the long end of this pole hangs a bucket, skin bag, or bitumen-coated reed basket, while the short end carries a weight (clay, stone, or similar) which serves as the counterpoise of a lever. When correctly balanced, the counterweight will support a half-filled bucket, so some effort is used to pull an empty bucket down to the water, but only the same effort is needed to lift a full bucket.
With an almost effortless swinging and lifting motion, the waterproof vessel is used to scoop up and carry water from one body of water (typically, a river or pond) to another. At the end of each movement, the water is emptied out into runnels that convey the water along irrigation ditches in the required direction.
It is estimated that a shaduf can raise over 2,500 litres per day.
Josh Tam loves Megan.
References
good bye mr poo plz dont poo on me by the hoosiers
See also
External links
- ^ "Definition of "Swape"". Webster's Revised Unabridged Dictionary. MICRA Inc. Retrieved 2007-04-25.
- ^ Joseph Needham (1965). Science and Civilisation in China. Cambridge University Press. ISBN 9780521327282.