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Water abstraction

Updated on 25/02/2019
Définition
Sens commun

Extraction of fresh water from a groundwater source or surface, permanently or temporarily, and conveyed to the place of use. Water abstractions include all activities related levies generated by agriculture, industry (including energy), the supply of drinking water, or other (mineral spring authorized, production artificial snow).

Source
according to AFB, IOWater, SOeS and OCDE

Flood warning

Updated on 08/04/2020
Définition
Sens commun

Warning issued in advance by the departmental flood forecasting services. In the event of heavy rainfall or hydrological alert, a flood warning is sent to the Prefect, who then alerts the mayors of the catchment areas concerned.

Source
according to OFB
Sens technique

Warning issued in advance by a special state service (flood forecasting service). In the event of a rainfall or hydrological alert (triggering when thresholds are exceeded), the flood forecasting service offers the Prefect the alert of the mayors of the watersheds concerned. As a severe overflow flood, the flood warning service broadcasts, for prefects and mayors, hydrological situation bulletins and information on the evolution of water levels . In 1994, 54 flood warning services monitored 16,000 km of waterways in France using automated measurement networks.

Source
According to Ministry of the Environment and OFB

Hydropower plant

Updated on 04/12/2018
Définition
Sens commun
Facility that produces electricity by the force of moving water.
Source
according to AFB
Sens technique
Hydroelectric facility transforming hydraulic energy into electricity, whose power usually varies from a few kW to 4,500 kW.
Source
according to IFREMER

Stagnant water

Updated on 06/09/2018
Définition
Sens commun
Still water in parts of a river, lake or other aquatic environment.
Source
according to UNESCO

Green water

Updated on 06/09/2018
Définition
Sens commun
Water contained in the soil and available for plants.
Source
according to AFB

Groundwater/river exchange

Updated on 06/09/2018
Définition
Sens commun
Exchange of water in one direction or the other between an aquifer and a river. Depending on the level of the water line, and on the season, groundwater feeds the river or is fed by it, particularly during floods. In the case of karst, these relationships are important and localised.
Source
according to AFB

Snow melt

Updated on 06/09/2018
Définition
Sens commun
Transformation of snow into liquid water.
Source
according to UNESCO

Hydraulics

Updated on 06/09/2018
Définition
Sens commun
A branch of fluid mechanics that deals with the flow of water (or other liquids) through pipes, open channels and other structures.
Source
according to UNESCO

Hydrometry

Updated on 06/09/2018
Définition
Sens commun
Science that aims to measure the physical properties of water, especially the flow of surface water and groundwater.
Source
according to the Larousse dictionary

Hygrometry

Updated on 06/09/2018
Définition
Sens commun
The branch of meteorology that characterises the humidity of the air, i.e. the amount of water in gaseous form present in moist air (or in some other gas, in some industrial applications). Hygrometry does not take into account water present in liquid or solid form.
Source
according to Wikipedia

Limnology

Updated on 06/09/2018
Définition
Sens commun
Science that studies lakes and open ponds, including hydrological phenomena, in relation with the environment.
Source
according to UNESCO

Alluvial plain

Updated on 06/09/2018
Définition
Sens commun
Plain formed by the deposition of sediments from upstream erosion.
Source
according to UNESCO

Pluviometry

Updated on 06/09/2018
Définition
Sens commun
Study of precipitations, their nature (rain, snow, soft hail, fog), their distribution and the techniques used for their measurement. Rainfall, with the distribution of Earth's temperature, conditions terrestrial climates, the nature and functioning of ecosystems and their primary productivity. It is one of the factors conditioning the development of human societies.
Source
according to Wikipedia

Annual precipitation

Updated on 06/09/2018
Définition
Sens commun
Mean annual cumulative rainfall at a given location.
Source
according to METEO FRANCE

Accumulated precipitation

Updated on 06/09/2018
Définition
Sens commun
Accumulated precipitation height at a location over a given period.
Source
according to METEO FRANCE

Extreme precipitation

Updated on 06/09/2018
Définition
Sens commun
A term that characterises high intensity rainfall events occurring over a short period of time, and of low occurrence in both time and space.
Source
according to IRSTEA and METEO FRANCE

Daily rainfall

Updated on 06/09/2018
Définition
Sens commun
A 24-hour cumulative precipitation height at a given location.
Source
according to METEO FRANCE

Monthly precipitation

Updated on 06/09/2018
Définition
Sens commun
Cumulative rainfall height at a location during a month.
Source
according to METEO FRANCE

Water pressure

Updated on 06/09/2018
Définition
Sens commun
Value representing the force applied by water on a surface. We distinguish the hydrostatic pressure, exerted by water at rest, from the dynamic pressure, linked to a movement of water.
Source
according to UNESCO

Flood travel

Updated on 06/09/2018
Définition
Sens commun
Travel of rising water levels from upstream to downstream of a watercourse.
Source
according to IRSTEA

Groundwater level rising

Updated on 06/09/2018
Définition
Sens commun
Rising of the groundwater level or of the piezometric surface due to a recharge after depletion.
Source
according to UNESCO

Groundwater-fed river

Updated on 06/09/2018
Définition
Sens commun
Stream whose water comes mainly from the aquifer it drains.
Source
according to French National Committee of Hydrological Sciences

Underground river

Updated on 06/09/2018
Définition
Sens commun
Stream passing through a very large cavity (e.g. a cave or a cavern) or a set of large communicating cavities.
Source
according to UNESCO

Drought

Updated on 18/03/2020
Définition
Sens commun

State of the soil or of an environment resulting from a lack of rain. It generally occurs when the amount of rain is significantly lower than seasonal norms, and this over a fairly long period.

Source
According to International Office for Water

Hydrodynamics

Updated on 06/09/2018
Définition
Sens commun
Branch of fluid mechanics which concerns the motion of fluids, whether liquid or gaseous. Hydrodynamics focuses on the properties of fluids, including velocity, viscosity, density, pressure, and temperature, as a function of space and time.
Source
according to the Larousse dictionary