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
165
J-Shaped distribution
An extremely asymmetrical frequency distribution with the maximum frequency distribution at the initial (or final) frequency group and declining (or increasing) frequency elsewhere......
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224
Acceptance/rejection,probability of
The probability that a lot of a given quality will be accepted or rejected by a given sampling plan.
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307
Orthographic projection
Method of representing the exact shape of an object in two or more planes generally at right angles to each other by extending perpendiculars from the object to the planes. The term `orthogonal projection` is sometimes used for this system of drawing......
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308
Oblique projection
The representation of objects on a single plane by means of their projections, the projecting lines making angles other than 90o with the plane. The object is usually placed with the front face, or two of the principal axes, parallel to the plane of projection. The angle of the projections with the plane is usually 45o and the drawing is then calle.....
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309
Axonometric projection
The representation of objects by means of their perpendicular projections on a single plane so placed that a rectangular solid projected upon it would show three faces. When all three faces are equally inclined to the plane of projection so that all the edges (and the three principal axes) are equally foreshortened, the method is called `isometric .....
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310
Multiview projection, or Multiplanar projection
A method of projection that shows the exact shape of an object can be represented by two or more separate views produced on projection planes that are usually at right angles to each other......
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311
Auxiliary projection
A projection of an object on a plane that is perpendicular to one of the principal planes of projection and inclined to the other two......
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312
Perspective projection
The representation of an object on a plane or curved surface as it appears to the eye.
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353
Energy (J)
It is the work done when the point of application of force of one newton is displaced through a distance of one metre in the direction of the force. Unit of energy is joule......
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607
Joules
img:equations//596_630_e.jpg
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608
Joules
img:equations//596_630_e.jpg
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609
Joules
img:equations//596_630_e.jpg
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610
Joules
img:equations//596_630_e.jpg
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611
Joules
img:equations//596_630_e.jpg
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749
Ice gorge, or Ice jam
A temporary dam that restricts flow. Caused by a stationary accumulation of fragmented ice or frazil.
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963
Pilot project
An early, usually small project set up to gain experience in operating the actual project.
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1009
Juvenile water
Water from the interior of the earth that is new or has never been a part of the general system of groundwater circulation......
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1014
Rejuvenated water
Water returned to the terrestrial water supply by geologic processes of compaction and metamorphism. It is divided into water of compaction and metamorphic water......
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1484
Groyne, Groin, Bankhead, Spur, Spur dike, Transverse dike, Jetty
1 - A structure built from the bank of a river in a direction transverse to the current. The groynes may be permeable, semi-permeable or impermeable. 2 - See 3479 and 8028......
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1509
Jetty
1 - An obstruction built of piles, rock, or other material extending into a stream or into the ocean from the bank or shore, placed to induce scouring or bank building, or to protect against erosion. 2 - A similar obstruction to influence river, lake, or tidal currents, or to protect a harbour. 3 - A wharf or pier. 4 - See 1484......
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1970
Heat injury
The term is often used in a collective sense to include all types of plant damage by excessively high temperature.
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1983
Poverty adjustment
The range of supply of a limiting element through which an increase in that element brings about an increase in plant growth. There is no increase in percentage of the element in the plant......
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2128
Gyttja
Name for humic soils of sedimentary origin in which the humus consists of plant and animal residues precipitated from standing water......
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2144
Sajong soils, or Shachiang soils
Soils containing 85 per cent calcium carbonate and having lime concentrations of ginger root size.
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2294
Open-jointed floor
The floor with open joints to relieve the upward pressure on the floor.
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