Catalogue GéoSAS
Reservoir - Sélune Observatory
Dams cause significant changes to the hydrological regime, water temperature, and biological and biogeochemical flows. This is the case for the Vezins and La Roche qui Boit dams, located on the main course of the Sélune River, which resulted in the existence of two reservoirs between 1919 and 2022 for La Roche qui Boit and between 1932 and 2019 for Vezins.
Since the end of the last emptying of the La Roche qui Boit dam at the end of 2022, these two lakes no longer exist in the valley landscape.
This layer represents the two reservoirs as they were referenced in 2017, i.e. before the start of the dismantling work on the two hydroelectric dams on the Sélune.
Among the attribute data associated with these two entities, the length is based on a calculation made by the Sélune project team using the reference points established across the entire watershed (and therefore across the entire course of the Sélune) and their knowledge of the areas of influence of the lakes/natural watercourse.
Simple
- Date ( Creation )
- 2023-06-29T00:00:00
- Edition
- 2023
- Identifier
- fr-202306291516001-decod-selune-lacs_retenue
- Purpose
- Locate the Sélune reservoirs and obtain summary information about them. Note that once these reservoirs have been drained for the purpose of removing the two dams, they will disappear permanently from the landscape of the Sélune Valley (end of 2022).
- Status
- Completed
- Maintenance and update frequency
- As needed
- Keywords ( Theme )
-
- Données ouvertes
- Keywords ( Theme )
-
- Limite
- INSPIRE themes INSPIRE themes ( Theme )
-
- Paysage
- Use limitation
- Usage libre sous réserve des mentions obligatoires sur tout document de diffusion : "Source : UMR DECOD INRAE - Agrocampus Ouest"
- Use limitation
- Licence ouverte : https://www.etalab.gouv.fr/licence-ouverte-open-licence
- Access constraints
- Other restrictions
- Use constraints
- License
- Other constraints
- Pas de restriction d’accès public
- Spatial representation type
- Vector
- Denominator
- 25000
- Metadata language
- fre
- Topic category
-
- Environment
- Description
- Secteur hydrographique "I9" (correspondant à la Sélune de sa source à l'embouchure
))
- Begin date
- 2012-01-01
- End date
- 2027-12-31
- Reference system identifier
- RGF93 / Lambert-93 (EPSG:2154)
- Geometric object type
- Surface
Distributor
- Name
- ESRI Shapefile
- Version
- 1.0
- OnLine resource
-
selune:v_ctxt_lac_retenue
(
OGC:WMS
)
v_ctxt_lac_retenue
- OnLine resource
-
Télécharger "Lacs de retenue - Observatoire Sélune" au format Shapefile
(
WWW:DOWNLOAD-1.0-http--download
)
Télécharger "Lacs de retenue - Observatoire Sélune" au format Shapefile
- OnLine resource
- Observatoire Sélune ( WWW:LINK-1.0-http--link )
- Hierarchy level
- Dataset
Conformance result
- Date ( Publication )
- 2023-06-29
- Explanation
- Non Evalué
- Pass
- No
- Statement
-
Geographical objects from the Carthage 2017 water body reference system.
Note that in the water body reference system, the two reservoirs are identified by a single object (see http://id.eaufrance.fr/StationMesureEauxSurface/I92-4703= ) identified by the code _I92-4703_.
In the Sélune observatory, it was decided to separate the two lakes into two distinct spatial entities.
The data provided with this layer are:
- code_entite_hydro (character string of length 80): Sandre code associated with the reservoir (I9--0200)
- entity_name (character string): “Le grand Lac”
- entity_code (character string): Sandre code associated with the Sélune (I9--0200)
- surface_area (real number) representing the surface area of the lakes in m2
- volume (real number) representing the volume in millions of m3
- assec (real number): integer name representing the year in which the reservoir was drained
- perimetre (real number): representation in meters of the perimeter of each lake
- retenue (character string): name assigned to the reservoir
- surface (real number): representation of the surface area in hectares of each lake.
- length (real number): representation of the length in meters of each lake.
- geometry (polygon): geographical representation of the reservoirs (considered as a single polygon in the reference, they have been separated into two in this data layer
gmd:MD_Metadata
- File identifier
- 28e72ff3-56b9-46e8-8ad4-617ad2c06a06 XML
- Metadata language
- fre
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2025-08-13T12:48:24
- Metadata standard name
- ISO 19115
- Metadata standard version
- 1.0
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