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

Multilingual Technical Dictionary (MTD)
<<    Browsing page 1 of 6    >>
Term No.Term Name/Term DescriptionAction
140
Prediction interval
The interval between the upper and lower limits attached to a predicted value to show, on a probability basis, its range of error......
Similar Terms
210
Confidence interval
An alternative type of estimate (to a point estimate) is an interval estimate that will be a function of the sample, i.e. random variables, having the property that prior to experimentation probability statements about the intervals including the parameter can be made. Thus, if it is possible to define two statistics t and t2 (functions of sample v.....
Similar Terms
211
One-sided confidence interval
When T is a function of the observed values, such that q being a population parameter to be estimated, the probability Pr (T * q) or the probability Pr ( T > q) is equal to 1- a (where 1-a is a fixed number, positive and less than 1). The interval from the smallest possible value of q up to T, or the interval between T and the greatest possible val.....
Similar Terms
261
Recurrence interval
The average time interval between actual occurrences of a hydrological event of a given or greater magnitude, e.g. in an annual flood series the average interval, a flood of a given size recurs as an annual maximum......
Similar Terms
262
Exceedence interval
The average number of years between the occurrence of a given event or a still greater event.
Similar Terms
557
Temperature interval
img:equations//557_559_e.jpg
Similar Terms
779
Rainfall intensity frequency, or Rainfall recurrence interval
The average time interval between the occurrence of rainfall of a given intensity and that of an equal or greater intensity......
Similar Terms
1042
Piestic interval
The difference in static levels between two isopiestic lines.
Similar Terms
2056
Tidal flood interval
Time between transit of moon over meridian of a place and the time of the following strength of flood.
Similar Terms
3749
Irrigation pipe aqueduct, Pipe aqueduct, Pipe flume
An aqueduct in which the canal water is taken in a pipe over the drainage, natural stream, depression or hollows. Also called `pipe flume`......
Similar Terms
3756
Syphon, Inverted siphon, Irrigation syphon, Canal syphon, Syphon superpassage
1 - A structure with a closed conduit, designed to run full and usually under pressure, to transport (i) canal water under railroads, roads, various types of drainage channels and depressions, or (ii) drainage water under railroads, roads, etc. In reference to cross-drainage works on canals, this term pinpoints to the condition that the canal passe.....
Similar Terms
3975
Lift irrigation area, or Lift area
Area interspersed between gravity flow areas where the levels are   higher than those permitted by gravity flow irrigation   from the source, but can be irrigated economically by water lifted by pumps or other water lifting devices to the required level at a certain  point in the supply system......
Similar Terms
4010
Continuous-flow irrigation
A system of delivery of irrigation water by which each irrigator receives his allotted quantity of water at a continuous rate throughout the growing or irrigation season......
Similar Terms
4032
Night-storage irrigation system
In this system practiced in Sudan, crops are not watered by night. The outlet pipes are closed at sunset but water continues to enter the tertiary canal, flow rate being the same as the one recorded during the day. At the downstream reaches of the tertiary canal, a small flat crested brick weir is constructed. A steel pipe is also provided across t.....
Similar Terms
4034
Intermittent-flow irrigation system
A system, in which each irrigator gets water only intermittently either by pre-established rotation of the basic flow (called module) or on demand i.e. according to the prior demands by individuals or group of individuals of the quantities and at the times that appear to them most desirable, or finally, in the most modern pressurized systems, in to.....
Similar Terms
4048
Irrigation return flow
That portion of the irrigation water supply which is not infiltrated into the soil, but returns to streams or rivers.  Its quality may be impaired by sediment, agricultural chemicals, or change in temperature. .....
Similar Terms
4065
Farm irrigation structures
Small structures and equipment that enable an irrigator to divert water from the watercourse and to convey it to various points in his field including control, regulation and measurement devices......
Similar Terms
4595
Collective irrigation system
A system meant to make possible the irrigation of several fields or farms of an area. It includes all or a part of the following works: storage, intake, diversion or pumping works, works for bringing water to the fields to be served, and other facilities necessary to operate the system......
Similar Terms
4596
Individual irrigation system
A system located downstream of the outlets served by the collective irrigation system and meant to deliver water to the farms or fields of an area......
Similar Terms
4597
Perennial irrigation
Irrigation of an area throughout the year
Similar Terms
4598
Seasonal irrigation
Irrigation of an area during only part of the year, the watering season.
Similar Terms
4599
Supplemental irrigation
Irrigation of an area only occasionally to supply water during irregular drought periods.
Similar Terms
4600
Systematic irrigation
Water applications repeated at definite intervals of time during the growing season of the crop(s).
Similar Terms
4601
Flow irrigation, or Gravity irrigation
Method of operating the whole or part of a system using water flow by only gravity, water being available at a sufficient level (or pressure) to ensure its conveyance and distribution in the fields......
Similar Terms
4602
Pumping irrigation
Method of operating a system or part of a system using, fully or partly, an artificial pressure for ensuring the conveyance of water, its delivery or distribution in the fields......
Similar Terms
<<    Browsing page 1 of 6    >>