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  2. Water and environmental management

Water and environmental management

Adapted Global Biological Index

Updated on 26/10/2022
Définition
Sens technique
Index for assessing the biological quality of the water of a river through an analysis of macro invertebrates, adapted to the specificities of large and deep rivers, where the IBGN protocol (Standardized Global Biological Index) may not always be strictly respected.
Source
According to OFB

Code of a measuring station

Updated on 26/10/2022
Définition
Sens technique

Identifier of one measuring station managed by the National Service for Water Data and Reference-dataset Management (Sandre), issued by the Water Agencies for all the stations measuring water quality in their basin.

Source
According to OFB

Indicator species

Updated on 26/10/2022
Définition
Sens technique
Species used to characterize the functional ecological status of French streams: trout (brown trout) for salmonid habitats (usually cold mountain freshwaters or close to reliefs), pike for cyprinid habitats (slow lowland streams), and the grayling or white water cyprinids (barbel, dace, etc) for intermediate environments. These species are demanding and found in all natural environments with good status.
Source
According to OFB

Fish classification of watercourses

Updated on 26/10/2022
Définition
Sens réglementaire
Legal classification of a watercourse based on the dominant species and worthy of protection. In principle, the river is classified in the first category when the dominant group consists of salmonids (salmon, trout) and in the second category, when the dominant group is composed of cyprinids (carp, barbel, roach, etc.). This classification determines the fishing practices.
Source
According to OFB

River syndicate

Updated on 13/07/2018
Définition
Sens commun
Syndicate of local authorities (municipalities, departments) geographically competent over a valley or a substantial portion thereof, whose purpose is to conduct all actions concerning the management of a river and of its tributaries (cleaning, habitat restoration, maintenance, facilitation of local politics on this issue, etc.).
Source
According to Rhone-Mediterranean and Corsica Water Agency

Sub-basin management plan

Updated on 13/07/2018
Définition
Sens technique

Established for a sub-basin, a group of sub-basins, corresponding to a consistent river basin or aquifer system, the sub-basin management plan (SAGE) sets out the general objectives and provisions to meet the principle of sound and sustainable water resources management, aquatic environment conservancy and protection of fish heritage. It must be compatible with the river basin management plan (SDAGE) or made compatible within three years with the SDAGE updating. It is established by a local water commission (CLE) and is approved by the prefect. The SAGE includes a…

Source
According to the Ministry for the Environment

Alluvial plain

Updated on 13/07/2018
Définition
Sens commun
Generic term generally used to designate the area built at the bottom of a valley by the deposit of alluvium of a stream. In a broad sense, it includes different environments and associated zones: riverbed, floodplain, open space, water dependent areas, etc.
Source
According to Rhone-Mediterranean and Corsica Water Agency

Dredging

Updated on 13/07/2018
Définition
Sens technique
According to the SDAGE and Order of 22 September 1994, this means removing alluvial deposits accumulated on the riverbed. Indeed, Article 11 of the Decree of 22 September 1994 provides that the extraction of materials in the riverbed of watercourses and bodies of water crossed by streams is prohibited. If extraction of alluvial materials is necessary for duly justified maintenance, or for the development of a watercourse or a
Source
According to Rhone-Mediterranean and Corsica Water Agency