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Groundwater depletion

Updated on 06/09/2018
Définition
Sens technique
Permanent or temporary drop in the piezometric level of groundwater, due to a natural or artificial change in its recharge or abstraction.
Source
according to the Adour-Garonne Water Agency and BRGM

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

Water Law of 3 January 1992

Updated on 25/02/2019
Définition
Sens réglementaire
Law making the necessary amendments to the legislative framework to implement the numerous European directives for defining the quality standards that water must meet for certain uses (drinking water, bathing water, fish-breeding water, shellfish waters). One of the strengths of the law of 3 January 1992 is the introduction of two new global water resources planning systems: master plans for water development and management (SDAGE) for each of the major French river basins, and water management and management plans (SAGE) developed on a more local scale. Contrary to the 1964 law, the 1992 law does not imply any obligation to monitor environments but it reinforces the principles of protection of aquatic ecosystems and consultation between water users and stakeholders. The evolution of knowledge is also making it clear that the assessment of river quality must be done by considering the different components of the environment (water and substrate) and the organisms that live in it.
Source
according to AFB

Meteorological drought

Updated on 18/03/2020
Définition
Sens commun

A type of drought corresponding to a pronounced and prolonged deficit of precipitation.

Source
according to Météo France

Good environmental status of marine waters (BEE)

Updated on 06/01/2021
Définition
Sens technique

Bon fonctionnement des écosystèmes (au niveau biologique, physique, chimique et sanitaire) permettant un usage durable du milieu marin. Onze descripteurs qualitatifs (annexe 1 de la DCSMM), communs à tous les États membres de l'Union européenne, servent à définir le bon état écologique : Biodiversité ; Espèces non indigènes ; Espèces commerciales ; Réseaux trophiques ; Eutrophisation ; Intégrité des fonds marins ; changements hydrographiques ; Contaminants ; Questions sanitaires ; Déchets marins ; Bruit sous-marin.

 

 

 

 

Source
D'après OFB

Groundwater recharge

Updated on 13/07/2018
Définition
Sens technique

According to the hydro-geological meaning, a water volume supplying an aquifer over a given time. Rainfalls are mainly recharging groundwater. Unconfined groundwaters are recharged rather fast at each rainfall event. The rise in water levels and rainfall events are observed on a piezometric curve.

Source
According to BRGM

Elevation of the piezometric record

Updated on 13/07/2018
Définition
Sens technique

Elevation defined either in NGF level (French levelling network) or in relative depth. The NGF level, established under the control of the National Geographic Institute (IGN), is the reference. NGF can indeed express altitudes in one and unique reference system, i.e. as compared to the same and unique fundamental point (or "origin-zero" or point zero). The "0" level is the average sea level in Marseilles. This point is used to determine the altitude of any other point. The elevation of the piezometric record can also be expressed in relative depth with respect to the benchmark of the

Source
According to BRGM

Piezometric record

Updated on 13/07/2018
Définition
Sens technique

The piezometric record is the collecting of the evolutions in time of the monitored groundwater level or piezometric level (see piezometric level). It consists of measurements that link the water level to a given date. Depending on the variability of groundwater level, the measurements are more or less close in time. The measurements obtained are positive or negative with respect to the measurement benchmark: they are positive when the groundwater level is below the benchmark measurement (the most common cases) and negative in the opposite case (artesian wells). Artesian: a well is artesian when the water is gushing. A record is represented by a curve which is time-slotted to be stored in a succession of points, each point representing a groundwater level at any given time. Points are linked to each other by means of a code that indicates whether a point is related to the preceding point in time. If the point is not related, it is then the initial point of a new part of the record…

Source
According to BRGM

Piezometric level

Updated on 13/07/2018
Définition
Sens technique
Level reached by water at one point and at a given time in a pipe reaching the groundwater sheet. The piezometric level can be transferred to a piezometric map. Some non-operated wells are used to measure this level, they are piezometers or observation wells. This level corresponds to the groundwater pressure; it is usually indicated in NGF metres (French Surveying and Levelling). When this level is above ground level, the groundwater is called artesian: water is gushing out. The piezometric maps established with all measured data give a graphical representation of the groundwater surface and can track its evolution over time and identify its direction of flow.
Source
According to BRGM

Groundwater ridge

Updated on 13/07/2018
Définition
Sens technique
Groundwater divide. Line at zero flow (no flow) between two adjacent groundwater basins. On each side of this ridge, the values of the measured piezometry (see this term) are lower than those measured (or estimated) on the ridge.
Source
According to the Ministry of Ecology

Sample

Updated on 13/07/2018
Définition
Sens commun

In the strict sense, it is taking a sample (sampling) for analysis or testing. More generally, water withdrawals include all abstractions related to activities generated by agriculture, industry (including energy), drinking water supply, or others (authorized spring of mineral water, production of artificial snow). In this case, the withdrawals are grouped into 3 subtypes corresponding to the affected environment: surface water withdrawals, groundwater abstractions, seawater withdrawals.

Source
According to AFB and IOWater

Quantity objective

Updated on 13/07/2018
Définition
Sens technique

Value (flow rate of streams, groundwater level, reserve storage, etc) necessary for the quantitative management of the resource. The quantity goals are set to achieve a satisfactory balance between the demands of human activities and the requirements of aquatic environments on the one hand; and the surface and groundwater resources that can be mobilized, on the other. At nodal points, these values are the

Source
According to the Ministry for the Environment and AFB

Drawdown

Updated on 13/07/2018
Définition
Sens technique
Lowering of the groundwater level at a given point by the extraction of water from the water table, the lowering of a water line of a stream in relation with groundwater or under the influence of earthworks, etc.
Source
According to the Ministry for the Environment and AFB

Piezometry

Updated on 13/07/2018
Définition
Sens commun
Depth of the water level in the soil.
Source
According to Poitou-Charentes Regional Council

Catchment area

Updated on 13/07/2018
Définition
Sens technique

Surface area feeding a watercourse or a body of water. The catchment area is defined as the area of water collecting up to an outlet: it is limited by a border within which all waters flow on the surface and underground to this outlet. Its boundaries are the watersheds (water divide - US).

Source
According to AFB