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
13
Derived data
Records of observations and measurements of physical facts, occurrences and conditions developed from `basic data` by standard methods of computation and estimation......
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15
Derived statistic
A derived statistic is one that is obtained by an arithmetical operation from the primary observations or statistics.
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342
Base units
The seven fundamental units of measurement upon which the International System of Units is based viz. Length (metre), weight mass (kilogram), time (second), electric current (ampere), thermodynamic temperature (kelvin), amount of substance (mole) and luminous intensity (candela)......
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350
Supplementary units
The SI units radian and steradian are called supplementary units. They are `dimensionless` derived units (more precisely, derived units of dimension one) with special names and symbols. Although the coherent unit for plane angle and for solid angle is expressed by the number 1, it is convenient to use the special names radian (rad) and steradian (s.....
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351
Derived units
Derived units are expressed algebraically in terms of base units. Their symbols are obtained by means of the mathematical signs of multiplication and division. The expression for the coherent derived units in terms of base units can be obtained from the dimensional products by using the following format substitution : L-->m, M-->kg, T-->s, I-->A, Q.....
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382
Non-SI units
There are certain units, recognized by the International Committee for Weights and Measures (CIPM) as having to be retained because of their practical importance (as given in the following tables)......
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577
British thermal units
img:equations//566_595_e.jpg
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578
British Thermal Units
img:equations//566_595_e.jpg
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579
British thermal units
img:equations//566_595_e.jpg
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8990
Units of project
A primary minor head under which a group of individual works in a project are arranged to facilitate preparation of estimates, financial control and statistical convenience, e.g. a multipurpose project may be split up into unit 1(dam and appurtenant works), unit 2 (irrigation, embankments and drainage works), unit 3 (hydro-electric installations), .....
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