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Vegetated discharge area

Updated on 25/02/2019
Définition
Sens technique
Space developed between the wastewater treatment plant and the receiving environment of treated wastewater discharges (it is not part of the wastewater treatment plant). The vegetated discharge areas (VDA) are characterised by the use of plants (mostly aquatic but possibly also terrestrial) and their planting close to the treatment plant, in the space remaining after the building of this plant. The VDA is not a wetland as there is no "long presence of natural water". It is also not a grass strip, specific to the mitigation of non-point source pollution (pesticides, fertilisers, sediments, etc.), especially in agriculture.
Source
according to AFB and IRSTEA

Environmental compensation

Updated on 04/12/2018
Définition
Sens commun
A set of actions for the environment to counterbalance the damage caused by the implementation of a project, which could not be avoided or limited. Environmental compensation can consist of the protection of natural areas, the restoration, use or long-term management of natural habitats.
Source
according to CELF

Environmental engineerin

Updated on 04/12/2018
Définition
Sens commun
Scientific, technical and practical knowledge to understand and improve interactions between human beings and natural environments.
Source
according to CELF

Ecological engineering

Updated on 04/12/2018
Définition
Sens commun
All scientific, technical and practical knowledge that takes into account ecological mechanisms. Ecological engineering is applied to resources management, the design and implementation of facilities or equipment, suitable for environmental protection.
Source
according to CELF

Ecological engineering

Updated on 04/12/2018
Définition
Sens commun
Carrying out projects that, in their implementation and monitoring, apply the principles of ecological engineering and enable the resilience of ecosystems. Ecological engineering allows recovering natural environments, restoring degraded environments and optimising the functions provided by ecosystems.
Source
according to CELF

Resilience

Updated on 04/12/2018
Définition
Sens commun
The ability of an ecosystem to withstand and survive alterations or disturbances affecting its structure or functioning, and eventually find a new balance.
Source
according to CELF

Ecosystem

Updated on 13/07/2018
Définition
Sens commun

All living beings (Living communities), non-living elements and climatic and geological conditions (biotope) that are related and interact with each other, and which constitute a basic functional unit in ecology. The ecosystem of an aquatic environment is generally described by: the living beings that are part of it, the nature of the bed and river banks, the characteristics of the catchment area, the hydraulic regime, and the physical-chemical characteristics of water.

Source
According to the Ministry for the Environment and AFB

Restoration

Updated on 13/07/2018
Définition
Sens commun
Action of enabling the return to the previous status of an ecosystem degraded by neglect, or the purposive control of human action.
Source
According to the Ministry for the Environment and AFB

French Association for Standardization (AFNOR)

Updated on 09/08/2019
Définition
Sens commun

Association governed by the law of 1901, recognized by public utility, composed of nearly 2,500 member companies. Its mission is to lead and coordinate the standards development process and promote their application. AFNOR is the central core of the French standardization system.

Source
According to Organisation internationale de normalisation

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

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

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