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
8777
Salinity wedge
A wedge-like formation when saline water intrudes into fresh water at the bottom and when the buoyancy effects predominate over turbulent mixing. Salinity wedge results in distinct stratification in velocity fields over the vertical......
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7813
Salinization
Excess accumulation of salt.
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2156
Salinization
The accumulation of soluble salts at the surface or at some point below the surface of the soil profile.
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6965
Salmonid
A fish belonging to the salmon or trout families.
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3913
Salmonide fish
A class of migratory fish (salmon, trout) that spawn in the fall or autumn.
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7682
Salt flat
The salt‑encrusted bottom of a desiccated lake.
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6765
Salt marsh
Similar to fresh (grass‑dominated) marsh, but adjacent to marine areas covered periodically (tidally or seasonally) with saline water......
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7736
Salt water intrusion
The movement of salt water into subterranean aquifers.
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1170
Salt-dilution gauging
A method for the measurement of flow of water based upon the nearly linear relation between the concentration and the electrical conductivity of a salt solution, which makes it possible to determine the degree of dilution by integrating a conductivity time graph......
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6459
Saltation
Wind and/or water erosion initiated by soil particles bouncing low over an unprotected surface.
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3119
Saltation
Discontinuous motion of particles above the bed of a channel in series of short hops. Also refers to the same type of movement of soil particles over a land surface during wind erosion......
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3120
Saltation layer
The zone above the bed where the phenomenon of saltation occurs in flowing channel.
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3121
Saltation load
The material bouncing along the bed, or moved, directly or indirectly, by the impact of the bouncing particles.
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3122
Saltation load discharge
The amount of material moved in unit time due to saltation.
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33
Sample size
The expanse of sampling units which are to be included in the sample.
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34
Sampling distribution
The distribution of a statistic (or set of statistics) in all possible samples chosen according to a specified sampling scheme......
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35
Sampling error
That part of the difference between a population value and an estimate thereof, derived from a random sample, due to fact that only a sample of value is observed; as distinct from errors due to imperfect selection, bias in response or estimation, errors of observation and recording, etc. The totality of sampling errors in all possible samples of th.....
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226
Sampling plan
The procedure for acceptance on the basis of sampling information, e.g. single-sampling plan, double-sampling plan, multiple-sampling plan and sequential-sampling plan......
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1176
Sampling station
In chemical gauging, the station downstream of the dosing station from which samples of water are taken to find out the concentration of the diluted chemical solution with a view to determining the discharge......
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133
Sampling variance
The variance of a sampling distribution.
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6623
Sanctuary
An area, usually set aside by legislation or deed., where uses and activities are restricted in order to preserve and protect organisms......
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7638
Sand
Mineral particles whose effective diameters lie in the range 0.02 - 2.0 mm.
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5149
Sand
1 - The fine material resulting from the natural disintegration of rock or crushing of friable rock. Classified according to soil texture and soil separates, with particle diameters between 0.05 and 2.0 mm. 2 - See 1657 and 7638......
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1657
Sand
1 - A soil particle between 0.05 and 2.0 mm. in diameter. 2 - Any one of the five separates, namely very coarse sand, coarse sand, medium sand, etc. 3 - See 5149 and 7638......
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3261
Sand asphalt
A mix of sand and bitumen or cutback, with or without filler, all in such proportion that the mix can be consolidated after spreading by rolling or tamping......
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