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
1040
Isopiestic line, or Pressure surface contour
Contour drawn on the piezometric surface of an artesian aquifer.
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1067
Water-table contour, or Groundwater contour
A line drawn on a map and passing through the points where the water table has the same elevation above a specified datum plane......
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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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2070
Contour
A line on a map or chart representing points of equal elevation with relation to a `datum`. It is called an isobath when connecting points of equal depth below a datum......
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4637
Contour canal
A canal whose alignment follows more or less the contour of the land. It may have only a single bank if on a side hill such that no bank is needed on the upslope side......
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4659
Flooding from ditches, or (contour ditch irrigation)
A type of controlled irrigation whereby the water is diverted from ditches (which more or less follow the contours) and flows as a sheet across fields. The delivery is controlled by the spacing between ditches as well as by the size and location of the openings on each ditch. Once commonly used on mountain meadows where it is referred to as ‘wild.....
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5304
Contour bank
Earth bank constructed along the contour of equal natural surface elevation to hold water or slow down the flow of water......
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6511
Contour cultivation, Contour farming, or Contouring
The process of conducting field operations, such as ploughing, planting and cultivation on the contour or at right angles to the natural direction of slope......
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6513
Contour strip cropping
The farming of sloping land in alternate strips of intertilled row crops and close-growing crops. These strips are placed on the contours at right angles to the direction of the natural flow of surface runoff water with the purpose of slowing down the runoff and of filtering out in the close-growing crop the soil washed from the land in the interti.....
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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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6535
Contour terrace
A low terrace formed on steep mountain slopes with inadequate natural cover to prevent erosion until natural cover becomes established. Checks or low dams are placed in the trough to prevent any lateral flow. This is also used on permeable agricultural land......
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7556
Contour ploughing
A conservation practice in which ploughing or furrowing machinery is operated along the contours of the land rather than up and down or across slopes; reducing surface water runoff and erosion......
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8929
Contour interval
The difference in elevation between adjacent contours on a map.
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