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
919
Valley storage, Lateral storage
The natural storage capacity or volume occupied by a stream in flood after it has overflowed its banks. It includes the quantity of water within the main channel (channel storage) and that which has overflowed its banks (lateral storage)......
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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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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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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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3441
Distributary head, Secondary canal intake, or Lateral turnout
Offtake regulator at the head of a distributary, lateral or secondary canal.
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3842
Straight (line, surface) sharp cut-water, Equilateral cut-water, or Sixty degree straight sharp cut-water
A sharp cut-water formed by two straight surfaces meeting at a line. Since the two straight sides of the cut-water and the width of the pier form a triangle, it is, sometimes, classified according to triangle properties (viz. equilateral cut-water) and also according to the value of the nose angle (as 60o straight sharp cut-water)......
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4641
Branch canal, Lateral, or Primary canal
Sub-division of the main canal from which the distributaries get their supplies. Normally, neither the main canal nor the laterals have any field outlets. Laterals for large areas may be themselves sub-divided into main laterals and sub-laterals. .....
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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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4725
Lateral-move irrigation machine sprinkler method
A sprinkler method consisting of a nozzle-line fitted with rotating sprinklers or fixed diffusers, and divided into sections by self-propelled towers, each with an electric motor. This moves by translation in a direction perpendicular to its axis. It therefore irrigates a rectangular field. It is supplied with water either by directly pumping from .....
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4888
Duty of outlet, or Lateral duty
Duty of water reckoned or measured at the outlet, or head of a watercourse or lateral.
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5101
Field drain, Farm drain, Field lateral or Field ditch
Open drain or drain pipe that directly receives inflowing surface or subsurface water. It discharges into open or closed collector drains.....
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5197
Parallel lateral open ditch system
A system similar to field ditch system, except that the ditches are deeper and cannot be crossed with most machinery (illustrated)......
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5212
Lateral drain, Collecting drain, or Collector drain
See 5301.
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5213
Sub-lateral, or Field drain
A line collecting the water from the soil and discharging it into a collector drain.
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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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5868
Tie bund
An embankment connecting two main embankments of a river diversion system.
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6440
Lateral erosion
The erosion of the side walls and side tributaries of the valley of a stream.
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6527
Contour bunding
The construction of small bunds across slope of the land on a contour so that the long slope is cut into a series of small ones and each contour bund acts as a barrier to the flow of water......
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6528
Contour bund
In soil conservation, an embankment constructed on a contour.
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6529
Side bund
In soil conservation, an embankment constructed along the slope usually at right angle to the contour bund.
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6530
Marginal bund
1 - In soil conservation, an embankment which is constructed at the lowest part of the catchment without any reference to contour. 2 - See 1525......
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6531
Lateral bund
In soil conservation, an embankment constructed at intervals along the contour bund, and constructed along the slope of the land and at right lines to the contour bund, to prevent flow towards and accumulation of water, in a depression especially when there is deviation from contour......
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