International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage

Multilingual Technical Dictionary (MTD)
<<    Browsing page 1 of 5    >>
Term No.Term Name/Term DescriptionAction
81
Nomograph
A diagram for the graphical solution of problems that involve formulae in two or more variables.
Similar Terms
307
Orthographic projection
Method of representing the exact shape of an object in two or more planes generally at right angles to each other by extending perpendiculars from the object to the planes. The term `orthogonal projection` is sometimes used for this system of drawing......
Similar Terms
321
Geographic maps
Maps of large areas showing towns and cities, streams and bodies of water, political boundaries and relief.
Similar Terms
322
Topographic maps, or Relief maps
Maps giving complete description of certain areas and showing, to larger scale, the geographical position of the natural features and the works of man. The relief is usually represented by contours......
Similar Terms
323
Hydrographic maps
Maps showing information concerning bodies of water, as shore lines, sounding depths, subaqueous contours, navigation aids and water control measures......
Similar Terms
332
Nomogram, Nomograph, or Alignment chart
1 - A graph that enables, with the aid of a straight edge, to read off the value of a dependent variable when the value of the independent variable is given. 2 - A graphic representation of numerical relations by any of various systems......
Similar Terms
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)......
Similar Terms
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.....
Similar Terms
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.....
Similar Terms
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)......
Similar Terms
410
Unified atomic mass unit
The unified atomic mass unit is equal to 1/12 of the mass of an atom of the nuclide 12C.
Similar Terms
577
British thermal units
img:equations//566_595_e.jpg
Similar Terms
578
British Thermal Units
img:equations//566_595_e.jpg
Similar Terms
579
British thermal units
img:equations//566_595_e.jpg
Similar Terms
688
Hydrography
Science dealing with ’sounding, charting and mapping open bodies of water for navigational purposes, analyzing and describing their forms and positions, and determining magnitude and direction of winds, tides, and currents......
Similar Terms
689
Orohydrography
The branch of hydrography which deals with the relations of topography to drainage.
Similar Terms
703
Barograph
A recording instrument for measuring atmospheric pressure.
Similar Terms
704
Thermograph
A recording instrument for measuring temperature.
Similar Terms
756
Orographic precipitation
Precipitation which results from the lifting of moist air over an orographic barrier, such as the windward side of a mountain range......
Similar Terms
793
Rain recording gauge, Rain recorder, Self-registering gauge, pluviograph
A recording instrument for measuring rainfall.
Similar Terms
794
Hyetograph
1 - The graphical indication of cumulative rainfall versus time produced by a rain recording gauge. 2 – A graphical representation of average rainfall, or excess rates or volumes over specified areas during successive units of time during a storm. 2 – Also a ‘self-registering rain gauge’. .....
Similar Terms
843
Water parting, Drainage divide, Divide, Watershed divide, Watershed boundary, Topographic divide
A summit or boundary line separating adjacent drainage basins.
Similar Terms
864
Distribution graph, or Distribution curve
1 – A graph showing the typical distribution of runoff from a drainage basin in terms of the percentage of the total runoff that occurs in each of a number of equally spaced intervals of time. 2 – See 68. .....
Similar Terms
866
Histograph, or Isochrone
A map or chart of a river or drainage basin on which a series of time lines give the time of transit of water, originating on a time line, to flow down to the outlet of the system......
Similar Terms
889
Psychrograph
A self-recording psychrometer giving simultaneous readings of the dry-bulb and wet-bulb thermometers.
Similar Terms
<<    Browsing page 1 of 5    >>