International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage

Multilingual Technical Dictionary (MTD)
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Term No.Term Name/Term DescriptionAction
192
One-sided test, One-tail test, or Single tail test
A test of a hypothesis when the region of rejection is wholly located at one end of the distribution of the test statistic, e.g. when the alternative hypothesis specifies values only to one side of the null hypothesis. The one-tail test may be described more precisely as either a `lower-tail test` or an `upper-tail test`......
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193
Two-sided test, or Two-tail test
A test of a hypothesis when the regions of rejection are located at both ends of the distribution of the test statistic.
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211
One-sided confidence interval
When T is a function of the observed values, such that q being a population parameter to be estimated, the probability Pr (T * q) or the probability Pr ( T > q) is equal to 1- a (where 1-a is a fixed number, positive and less than 1). The interval from the smallest possible value of q up to T, or the interval between T and the greatest possible val.....
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1525
Marginal bund
1 - A backwater bund; a term used in India and Europe for an embankment built along a river, upstream of a weir at a short distance from the margin. (illustrated). 2 - See 6530......
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1527
Guide bank, or Bell`s bund
A protective or training embankment constructed at the side of a weir, bridge, etc., to guide the river into the waterway in the structure; named after Mr. J.R. Bell who designed such bunds (illustrated)......
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1536
Bunding
A kind of bank protection where, owing to space or usage, or for strength, a continuous vertical or nearly vertical wall or other structure is built in front of the margin......
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2195
Side dressing
The placement of fertilizers along the side of the crops in the row after the crop is established.
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2222
Wing levee, Afflux bund, or Afflux bank
An embankment or dike designed to prevent the outflanking of the abutment by flood waters passing round the end of the weir, extending up to, but not across, the whole of the river flood plain......
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2282
Guide bund
A training wall intended to lead water smoothly to or away from a barrage or weir. It is built of earth, masonry or concrete or any other locally available material......
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2304
Side weir
A weir over which water flows approximately parallel to the crest.
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2543
Upstream blanket, or Riverside blanket
A blanket of impervious material provided on the upstream of an earthen dam or on the river side of a Levea (called riverside blanket) on a pervious sub-stratum, for controlling the seepage of water by increasing the path of travel as also the entry of water into the substratum to reduce the flow of seepage as well as the phreatic pressure on the d.....
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2757
Side channel spillway, or Lateral flow spillway
A type of spillway where the flow after passing over a weir or ogee crest is carried away by a channel running essentially parallel to the spillway crest (illustrated)......
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3145
Side factor
A factor in Generalized Regime Theory by Blench related to the effect of the side of a channel, and is equal to the cube of mean velocity of flow divided by mean width of the cross section of area of flow......
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3188
Side slope
The slope that the sides of a canal or embankment make with the horizontal (illustrated).
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3195
Berm, or Inside berm
1 - A horizontal strip or shelf built into an embankment or cut, to break the continuity of an otherwise long slope, usually for the purpose of reducing erosion, or to increase the thickness or width of cross section of an embankment or to increase the stability of the slope. 2 - The space left between the upper edge of a cut and the toe of an emba.....
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3332
Side pitching, or Side beaching
Pitching on the sides of the earthen canal sections, upstream and downstream sides (usually beyond the transitions) of canal structures, to protect them (sides) from the action of water......
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3388
Side transitions
The portions of the sides of transitions in an open conduit.
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4639
Side slope canal
A canal aligned roughly at right angles to the contours and neither on the ridge nor in the valley.
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4648
Parallel canal, or Side canal
A canal built by the side of an important canal (main canal or lateral or a branch of the latter) in order to serve the lands lying alongside. It is called `gannabia` in Egypt and `ditch canal` in Pakistan......
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4720
Roll-move sprinkler lateral system or Side-roll sprinkler lateral system
A sprinkler method in which a pressurized pipeline, which carries medium pressure sprinkler heads, is used as axle to the wheels that support it, at regular intervals. The pipeline is kept in a fixed position while watering, then drained and rolled parallel to itself to a new position, where it is re-pressurized for the next set......
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4729
Side Roll System
System, a variation on the hand-moved lateral sprinkler line, in which the lateral line is mounted on wheels, with the pipe forming the axle (using specially strengthened pipe and couplers). The wheel height is selected so that the axle clears the crop as it is moved. A drive unit, usually an air-cooled gasoline-powered engine located near the cent.....
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5237
Side inlet
A structure to permit surface water to enter an open drain.
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5357
Side slope
The slopes that the sides of a drain or ditch make with the horizontal.
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5435
Side clearance
Horizontal distance between inlet of pump and nearest part of sump wall.
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5867
Ring bund
An embankment built temporarily on a river bed surrounding the site of construction of the hydraulic works.
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