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

Multilingual Technical Dictionary (MTD)
<<    Browsing page 1 of 20    >>
Term No.Term Name/Term DescriptionAction
1628
R horizon
A layer of continuous indurated rock, sufficiently cohesive when moistened as to make hand digging with a spade impracticable......
Similar Terms
3178
Rabi and monsoon sections of a canal
These terms are used in Indian sub-continent. The `rabi section` is the cross-sectional area of a canal in which assured supply is available for maturing two-season and rabi crops only. The rest of the cross section is the `monsoon section` in which water may be supplied when available, in the monsoon and rabi seasons without any assurance......
Similar Terms
3985
Rabi crop (Bangladesh, India and Pakistan)
Winter crop.
Similar Terms
2692
Race
The channel that leads water to or from a water wheel or water turbine such as head race or tail race.
Similar Terms
6317
Radar
Process or equipment that uses the reflection of beamed, repeated and timed electromagnetic-magnetic radiation to detect, locate and / or quantify objects, to measure their distance, or to acquire a terrain image. Some radars,called `meteorological radars` or `weather radars`are specially designed to detect and provide images of meteorological phen.....
Similar Terms
5347
Radial drainage pattern
Drainage pattern resembling the spokes of a wheel in which drainage channels flow radially either outward from a peak or inward toward a basin......
Similar Terms
5431
Radial flow pump
A centrifugal type pump in which the pressure for the circulating water is developed principally by action of centrifugal force......
Similar Terms
3930
Radial flow turbine
A type of turbine in which the path of any particle of water in its flow through the runner lies substantially in a plane perpendicular to the axis of rotation in a generally radial direction, the water being admitted at one radius and discharged at another usually all round the periphery. If the water enters at the inner circumference and discharg.....
Similar Terms
2933
Radial gate, or Tainter gate
A gate that may be pivoted or hinged with a water face that is usually arc with the centre of curvature at the pivot and water load is transferred through radial struts converging downstream to horizontal shafts or pins anchored in the piers. It carries the name of `Tainter gate` in honour of the inventor Burnham Tainter (illustrated)......
Similar Terms
2972
Radial lock gates
A radial gate used in a lock. It is required to be raised high enough to provide necessary clearance to the passing traffic......
Similar Terms
4184
Radial well, Ranney well, or Collector well
A variation of strainer well; in this case the strainers are driven horizontally in the water-bearing strata, radiating from a central sump or open well. This enables tapping of a shallow depth of aquifer......
Similar Terms
4517
Radial-flow pump
A pump in which fluid enters the rotating impeller near the axis of rotation and discharges with a combined radial and tangential motion......
Similar Terms
3579
Radial-gate spillway
Overflow spillway utilizing radial gates; when automatic, will automatically open or close with the rise or fall of the water surface in the canal......
Similar Terms
7230
Radioactive decay
Disintegration of the nucleus of unstable nuclides by spontaneous emission of charged particles and/or photons.
Similar Terms
6262
Radioactive tracer
Material detectable by its emitted ionizing radiation and suitable for water tracing even at very low concentrations.
Similar Terms
7238
Radioactive tracer
Radioactive material detectable by its nuclear radiation; useful for tracing sources of water, even at very low concentrations.  .....
Similar Terms
7239
Radioactive waste
Any waste that contains radioactive material; especially  in concentrations that  exceed amounts allowed by law.  
Similar Terms
7226
Radioecology
The study of the effects of radiation on plants and animals in natural communities.
Similar Terms
7227
Radioisotopes
Radioactive forms of chemical compounds.
Similar Terms
7229
Radionuclides
Any nuclide that emits radiation.
Similar Terms
4218
Radius of a well
The radius of the inside of the well casing or screen, or the radius of the bore hole for an uncased well (illustrated).
Similar Terms
4239
Radius of influence
The radius of the circle of influence (illustrated).
Similar Terms
3853
Raft foundation
A layer of concrete, usually reinforced, extending under the whole area of columns, piers and abutments and projecting outside their base periphery; used to provide a foundation in case where the ground is unduly soft or the loading to be put upon it is unduly heavy......
Similar Terms
4681
Railing
Agricultural method of brush removal from a field using a tractor-drawn railway rail.
Similar Terms
773
Rain
Precipitation in the form of liquid water drops greater than 0.5 mm.
Similar Terms
<<    Browsing page 1 of 20    >>