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
370
Pressure
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430
Pressure
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550
Pressure
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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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741
Sheet ice
Ice formed in a smooth thin layer on the surface of the water in lakes and streams by the coagulation of frazil ice during rapid freezing.  Sheet ice attached to the stream margins is known as border ice, while moving sheet ice is known as skim ice or pan ice......
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742
Cat ice, or Shell ice
An unbroken ice sheet on a body of water under which the water level has receded, so that a cavity is formed between the water surface and the ice......
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743
Slush ice
A floating agglomeration of flocs of frazil ice.
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744
Ice storm
Storm characterized by occurrence of a glaze.
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745
Glaze, Clear ice, Black ice or Freezing rain
A generally homogeneous and transparent ice layer deposited by drizzle or rain that is supercooled on surfaces having temperature below  0oC ; it may also be produced by non-supercooled drizzle or rain falling on the surface having temperature below 0oC and starting to freeze at once.  Rime ice is softer and less transparent than glaze......
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746
Subsurface ice, or Interstitial ice
Ice that occurs below the surface of the lithosphere. It may be formed by the freezing of saturated or unsaturated rock or soil, or by the covering of a bed of surface ice or snow by a mantle of rock debris......
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747
Anchor ice
Ice formed below the surface of a stream  on underwater objects. It is caused by adherence of frazil ice crystals or, in the case of very turbulent streams, by supercooled surface waters being transported to a considerable depth......
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748
Frazil ice
Fine spicules of ice in suspension in water caused by supercooling and nucleation at the air-water interface.
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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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886
Vapour pressure
The partial pressure of water vapour in the air or atmosphere.
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1033
Interstice, or Void (in a rock, or soil)
A space in a rock or soil, that is not occupied by solid matter.
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1038
Artesian pressure
Pressure of the artesian water.
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1040
Isopiestic line, or Pressure surface contour
Contour drawn on the piezometric surface of an artesian aquifer.
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1041
Pressure surface map
A map showing the contours of the pressure surface of a confined water system.
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1043
Piezometric surface, or Pressure surface
1 - An imaginary surface that everywhere coincides with the head of the water in an aquifer. 2 - See 5272.
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1526
Bank sluice
An opening controlled by shutters or gates in the marginal embankment which are opened during high floods.
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1530
Crevasse, or Crevice
A breach in a levee or river embankment.
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1631
Plough soil, Plowsole pan, or Induced pressure
A surface horizon or soil layer having a higher bulk density and a lower total porosity than the soil above or below it, as a result of pressure that has been applied by normal tillage operations or by other artificial means . Frequently referred to as plow pan, plowsole or traffic pan......
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1835
Capillary interstice
An interstice small enough to produce appreciable capillary rise.
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1836
Subcapillary interstice
An interstice smaller than a capillary interstice in which molecular attraction spans the entire space and water is held immovable against the force of gravity by adhesion......
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