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
700
Hydrological cycle
The circulation of water from the sea, through the atmosphere, to the land, and thence, often with many delays, back to the sea or ocean through processes such as precipitation, interception, runoff, infiltration, percolation, groundwater storage, evaporation and transpiration......
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701
Hydrological regime
Variations in the state and characteristics of a water body which are regularly repeated in time and space and which pass through phases, e.g. seasonal. .....
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715
Hydrological drought:
Occurs when surface and subsurface water supplies are below normal.
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721
Hydrological year, or Water year
A continuous twelve-month period selected for the presentation of streamflow data during which a complete annual stream-flow cycle occurs and therefore carryover or storage changes are minimal. .....
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930
Hydrological model
A numerical representation of a hydrological system leading to an acceptable simulation of the physical processes in hydrology......
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962
International hydrological programme (IHP)
Unesco’s intergovernmental scientific cooperative programme in water resources for improvement and development of hydrological studies and methods for rational management of water resources, including protection of the environment, research, education and capacity building. Sixth phase of IHP (IHP-VI) is running (2002-2007)......
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7542
Hydrological civilization
A civilization that depends on sophisticated water management to sustain its agriculture.
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8883
Hydrological data
In reference to water resources development, this term refers to data on precipitation, river stages, river discharges, sediment transportation, yield and storage of groundwater, evapotranspiration, valley storage, maximum flood levels and discharges and the quality of water as well as other related meteorological data, such as temperature......
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8885
Hydrological investigations, or Hydrologic studies
Collection, including methods and techniques used and installation of further data collection stations, of hydrological data and appraisal of available water supply for various phases of water resources development and appurtenant works and operations related thereto, including the determination of the extremes, such as floods and droughts......
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8895
Groundwater investigations, or Geohydrological investigations
Investigations of groundwater resources regarding their occurrence, movement, storage, discharge, quality, and their appraisal to determine the quantity they can yield......
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