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

Multilingual Technical Dictionary (MTD)
<<    Browsing page 1 of 3    >>
Term No.Term Name/Term DescriptionAction
440
Discharge and yield
img:equations//439_441_e.jpg
Similar Terms
552
Discharge and yield
img:equations//550-552_e.jpg
Similar Terms
841
Drainage area, Drainage basin, River basin, Catchment area, Catchment basin, Catchment, Watershed
The area from which a lake, stream or waterway and reservoir receives surface flow that originated as precipitation.
Similar Terms
842
Experimental basin, or Experimental watershed (USA, AU)
Drainage basin or catchment area in which natural conditions are deliberately modified and in which the effects of these modifications on the hydrologic cycle are studied......
Similar Terms
851
Yield of drainage basin, Annual yield of drainage basin
Total volume or flow from a drainage basin for a stipulated period of time, e.g. ‘annual yield of drainage basin’ is the mean annual runoff......
Similar Terms
915
Specific yield
1  The ratio of the volume of water that can be removed by free drainage from a saturated soil to the total volume of the soil. Also called `drainage or drainable porosity`. 2  The ratio of that volume of water that a rock or soil, after being saturated, will yield by gravity, to the volume of rock or soil. 3 - See 5277......
Similar Terms
959
Retarding reservoir, or Detention reservoir
A flood control reservoir with uncontrolled outlets.
Similar Terms
972
Ungauged basin, or Ungaged watershed (US)
Drainage basin of which no regular hydrological records are available.
Similar Terms
1007
Cavern water reservoir
A large, natural temporary or permanent storage of percolated or inflow water in dolines (hollows) through ponore`s (abysse`s) in limestone formation caused by water action. Such waters find way to the earth`s surface through large springs......
Similar Terms
1025
Groundwater reservoir
1 - A reservoir in which groundwater is stored. The water may enter in the reservoir natural means (seepage, infiltration, etc.) or by the action of men (injection wells, spreading etc.) 2 - Aquifer......
Similar Terms
1029
Catchment area, or Basin (of an aquifer)
The surface area composed of the intake area of an aquifer and all other areas that contribute surface water to the intake......
Similar Terms
1116
Economic yield
The maximum rate at which water can be withdrawn from an aquifer throughout the foreseeable future without depleting the supply or altering the chemical character of the water to such an extent that withdrawal at this rate is no longer economically possible. The term may be applied with respect to a single user or all users in a groundwater basin......
Similar Terms
1117
Physical yield limit, or Potential yield
The greatest rate of artificial withdrawal from an aquifer that can be maintained throughout the foreseeable future without regard to cost. Equal therefore to the present recharge, or that anticipated in the foreseeable future, less the unrecoverable natural discharge......
Similar Terms
1250
Catchment basin
A unit watershed; the entire area from which drainage is received; a natural water collecting area supplying water to a single waterway......
Similar Terms
1261
Reservoir
A body of water impounded by human activity.
Similar Terms
1357
Sediment yield
The total sediment outflow from a watershed or past a given location in a specified period of time. It includes bedload as well as suspended load. Usually expressed as load per unit of time......
Similar Terms
1847
Capillary yield
The quantity of capillary water in mm per day or in litres/sec/hectare, rising through a plane parallel to the phreatic surface, situated at a certain depth below the ground surface......
Similar Terms
2381
Reservoir, Tank, or Pool
A pond, lake or basin either natural or manmade for the storage, regulation and control of water. Small reservoirs are called tanks in India, Ceylon......
Similar Terms
2382
Auxiliary reservoir
A reservoir that supplements the storage of another or main reservoir.
Similar Terms
2383
Balancing tank, Balancing reservoir, Equilising reservoir, or Compensating reservoir
1 - A reservoir subsidiary to the main reservoir for storing excess river water to be utilized during periods of short supply. 2 - See 4554......
Similar Terms
2384
Conservation reservoir, or Conservation storage reservoir
A reservoir, impounding water for useful purposes such as municipal supply, power, production, irrigation or recreation.
Similar Terms
2385
Flood control reservoir, or Single-purpose flood control reservoir
A reservoir operating on the principle that it will be used for the temporary storage of flood waters for subsequent release as rapidly as channel conditions would permit......
Similar Terms
2386
Reservoir basin
The drainage basin feeding the reservoir.
Similar Terms
2387
Safe yield of reservoir basin, or Safe yield of catchment
The annual runoff flowing from the basin into the reservoir that can be depended upon for utilization.
Similar Terms
2388
Surface area of reservoir, or Maximum water surface area
The water surface area of a reservoir at its designed full capacity.
Similar Terms
<<    Browsing page 1 of 3    >>