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Irrigation Dictionary : Table of Contents (members login required)\t
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Term No.Term NameTerm Description
1624A horizonA mineral horizon formed or forming at or adjacent to the surface that shows: a) an accumulation of organic matter intimately associated with the mine.....
6131A-FrameAn open structure tapering from a wide base to a load-bearing top......
8096A/D ConverterDevice used to covert an analog input signal to a digital output form that can be understood by a computer. .....
7162AbatementA reduction in the degree or intensity of pollution......
135Aberrations, Anomalies, or IrregularitiesA description of relatively unusual or irregular values of variables in a table or other display......
6608Abiocoen All the non-living components of the environment. .....
6849AbiosestonThe non‑living components of the seston......
6609Abiotic Referring to the non-living components of the environment. .....
6804Abiotic productivityThe amount of material yielded by an inorganic, renewable resource process......
751AblationThe combined processes (such as sublimation, melting,or calving) which remove snow or ice from the surface of a glacier or snowfield. .....
1Abnormal1 - Not normal. The term is used without any quantitative meaning, its use depends on judgement of the past records of similar occurrences. 2 - Above .....
1374Abnormal scourScour caused by deflected on-flowing currents, as by the river running tangentially forming an eddy when leaving the curve of the protection structure.....
1409Abrasion1 - 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.....
6427Abrasion1 - A wearing away process, as of ice or snow by melting, or of land by the action of running surface water. 2 - See 1409......
5959Abrasion drill, or Rotary drillA type of drill that grinds rock into small particles through the abrasive effect of a bit that rotates in the hole......
2571Abridged trial load method, or Simplified trial load methodUsed for arch dam preliminary design work by using tables and curves for determining deflections of arches. Modified assumptions are made with regard .....
3Absolute1 - Absolute value, i.e. the actual magnitude regardless of its sign. 2 - Independent of any arbitrary standard and determined only by the fundamental.....
4260Absolute artesian wellAn 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 .....
3041Absolute pathsPaths relative to a base such as earth......
1122Absorbed waterWater held on the surface of individual soil particles by the force of molecular attraction with emission of heat (heat of wetting)......
4146Absorbing 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)......
1939AbsorptionThe upward passage, by osmosis, of inorganic salts in solution from soil water to the root hairs......
3999AbsorptionAn act or process of absorbing water by sub-soil in the   perimeter of the canals/streams.(See 1939)......
1961Absorption coefficientRepresents 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.....
870Absorption lossSeepage 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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