ICID-MTD

Multilingual Technical Dictionary (MTD)

Irrigation Dictionary : Table of Contents (members login required)\t
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Term No.	Term Name	Term Description
1624	A horizon	A mineral horizon formed or forming at or adjacent to the surface that shows: a) an accumulation of organic matter intimately associated with the mine.....
6131	A-Frame	An open structure tapering from a wide base to a load-bearing top......
8096	A/D Converter	Device used to covert an analog input signal to a digital output form that can be understood by a computer. .....
7162	Abatement	A reduction in the degree or intensity of pollution......
135	Aberrations, Anomalies, or Irregularities	A description of relatively unusual or irregular values of variables in a table or other display......
6608	Abiocoen	All the non-living components of the environment. .....
6849	Abioseston	The non‑living components of the seston......
6609	Abiotic	Referring to the non-living components of the environment. .....
6804	Abiotic productivity	The amount of material yielded by an inorganic, renewable resource process......
751	Ablation	The combined processes (such as sublimation, melting,or calving) which remove snow or ice from the surface of a glacier or snowfield. .....
1	Abnormal	1 - Not normal. The term is used without any quantitative meaning, its use depends on judgement of the past records of similar occurrences. 2 - Above .....
1374	Abnormal scour	Scour caused by deflected on-flowing currents, as by the river running tangentially forming an eddy when leaving the curve of the protection structure.....
1409	Abrasion	1 - Mutual rubbing of particles of sediment in flowing water as well as in the channel bed as a result of which these particles tend to decrease in si.....
6427	Abrasion	1 - A wearing away process, as of ice or snow by melting, or of land by the action of running surface water. 2 - See 1409......
5959	Abrasion drill, or Rotary drill	A type of drill that grinds rock into small particles through the abrasive effect of a bit that rotates in the hole......
2571	Abridged trial load method, or Simplified trial load method	Used for arch dam preliminary design work by using tables and curves for determining deflections of arches. Modified assumptions are made with regard .....
3	Absolute	1 - Absolute value, i.e. the actual magnitude regardless of its sign. 2 - Independent of any arbitrary standard and determined only by the fundamental.....
4260	Absolute artesian well	An artesian well which is isolated by sealing from a permeable layer, if it happens to traverse it, overlying the upper confining bed of the artesian .....
3041	Absolute paths	Paths relative to a base such as earth......
1122	Absorbed water	Water held on the surface of individual soil particles by the force of molecular attraction with emission of heat (heat of wetting)......
4146	Absorbing well, Drain well, Dead well, or Negative well	1 - A shaft or well driven through an impermeable stratum to allow surface water to drain through to a permeable one. 2 - See 2559 (drain well)......
3999	Absorption	An act or process of absorbing water by sub-soil in the perimeter of the canals/streams.(See 1939)......
1939	Absorption	The upward passage, by osmosis, of inorganic salts in solution from soil water to the root hairs......
1961	Absorption coefficient	Represents the volume of gas, reduced to standard conditions (0oC and 760 mm pressure), dissolved in one volume of liquid when the pressure of the gas.....
870	Absorption loss	Seepage into the bed of a canal that occurs shortly after water is turned into the dry canal (as the canal is being primed). (See 4000). .....

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The Multilingual Technical Dictionary (MTD) is an e-dictionary of all technical terms related to irrigation, drainage, flood management, environment, river training, and allied disciplines of the water sector. Any term/ definition can be printed/copied with the option to download/updates of terms from the ICID website. The MTD enriches the process of sharing and exchange of experiences and has proven to be highly useful for engineers, researchers, students, professionals, planners, designers, academics and all others related to the field of irrigation and drainage. It is more helpful for professionals outside the water sector, in simplifying the technical jargon and to understand the sectoral nuances easily.

As part of ICID's flagship activity, it was first published in English and French languages in 1967, the – 4^th edition of the MTD (English-French) was brought out on CD-ROM in the year 2002. Currently, we are following the 5^th edition released in 2009, which defines 9,370 technical terms in Chinese, Japanese and Russian, besides English and French. This online version of MTD is based on the 5th edition's DVD format. This version includes 9370 technical terms with matching English and French translation. The DVD version also includes terms collected in Chinese, Japanese and Russian languages with the active support received from respective National Committees. However, full integration with online versions has not taken place due to the difference in available translation editions/ versions. National Committees of Iran, China, Japan, Russia, Korea, and India are working on the translation/ updating part to match the present online version.