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
3783
I-beam bridge
A small bridge consisting of a floor supported on I-beams.
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9322
Ice Cap
A dome-shaped ice mass covering a highland area that is considerably smaller in extent than ice sheets.
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739
Ice cover
Ice on the water surface of a lake or stream.
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740
Ice fringe
Ice deposit of moisture, not hoarfrost, exuded from stems of plants.
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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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7958
Ice jam flood
An accumulation of broken river ice lodged in a narrow part of the river channel. It frequently produces local floods during a spring breakup, or flooding because of the backwater curve resulting in overtopping of banks and flood embankments......
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2631
Ice pressure
Pressure produced by ice due to its thermal expansion and by wind drag. Its value is generally taken from empirical curves developed from field and laboratory zests......
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9323
Ice Shelf
A floating ice sheet of considerable thickness attached to a coast (usually of great horizontal extent with a level or gently undulating surface); often a seaward extension of ice sheets......
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744
Ice storm
Storm characterized by occurrence of a glaze.
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8538
Iconic models, or Physical models
A physical replica of the real system on a reduced scale.
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4614
Ideal irrigation interval
Interval corresponding to irrigations meeting the actual requirements of the crop without shortages or excesses of water......
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8600
Identification problem, or Inverse problem
Problems involving determination of parameters that govern the response of a system.
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5466
Igneous magma
The molten fluids and gaseous fractions generated within the earth, from which igneous rocks are considered to have been derived by crystallization or other processes of consolidation......
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5465
Igneous rocks
Rock masses formed by the solidification of magma injected into the earth`s surface, or extruded on its surface.
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1618
Illuvial horizon
A soil layer or horizon in which the material carried on an overlying layer (eluvial horizon) has been precipitated from the solution or deposited from suspension. The layer of accumulation......
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6296
Image
Recorded representation of an object produced by optical, electro-optical, optical-mechanical, or electronic means.
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6297
Image enhancement
Manipulation of image density or colour to allow certain features of the image to be seen more easily.
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8178
Image File
A file containing an image.
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1811
Imbibation moisture, or Water of imbibation
The moisture associated with soil colloidal material.
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1598
Immature soil
A soil with indistinct or only slightly developed horizons because of the relatively short time it has been subjected to the various soil-forming processes. A soil which has not reached equilibrium with the environment......
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7114
Immission
The reception of pollution from a remote source.
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3059
Impact
The striking together of two or more solid bodies or streams of fluid resulting in energy loss or more accurately, energy transformation......
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6620
Impact indicator
An environmental element or parameter that provides a qualitative measure of a human or natural activity.
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3060
Impact loss
The head lost as a result of the impact of particles of water; included in and scarcely distinguishable from eddy loss.
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3061
Impact pressure
The pressure acting at the forward stagnation point of a body, such as a Pitot tube, placed in liquid current. Impact pressure may be measured from an arbitrary datum pressure......
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