HORIZON 1 SUPERRAIN WATER MASSES (DCE cycle 3)
Description
A body of groundwater is a separate volume of groundwater within one or more aquifers, constituting the basic delineation of aquatic environments intended to be the unit of assessment for the WFD. It makes it possible to define environmental objectives, to assess the state of the environment and subsequently to verify the achievement of these objectives.
Groundwater bodies, based on the work carried out on the BDLISA v2 hydrogeological repository, have been identified and delineated.
The water bodies are divided according to the following main principles:
Water bodies are delineated on the basis of geological and hydrogeological criteria, Redistribution of water bodies to take account of the effects of anthropogenic pressures must remain limited.
The boundaries of water bodies must be stable and sustainable. Like bodies of surface water, the delimitation of bodies of groundwater is organised on the basis of a typology.
This typology is largely inspired by the one developed for hydrogeological entities defined in the context of the revision of the LISA DB. It is based on the geological nature and hydrodynamic behavior or "large" operation of aquifer systems (nature, flow velocity). It includes two levels of characteristics, primary and secondary.
Water bodies can trade with each other. All abstractions for drinking water supply, supplying more than 10 m3/day of drinking water or used for the supply of water to more than 50 persons, must be included in a body of water.
Deep groundwater, unrelated to rivers and surface ecosystems, from which no abstraction takes place and which is not likely to be used for drinking water because of its quality (salinity, temperature, etc.), or for technical and economic reasons (disproportionate cost of abstraction) may not constitute water bodies.
Given its size, a body of water may have a certain spatial heterogeneity in terms of both its hydrogeological characteristics and its qualitative and quantitative status.
At any point several water bodies may overlap. In the case where several groundwater bodies are superimposed, the Horizon attribute allows the water bodies to be positioned relative to each other for the elemental polygon concerned. The deepest body of water with the highest horizon value. The horizon at ground level is 1.
Resources
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https://www.data.gouv.fr/api/1/datasets/r/e81ee3b2-9ab2-4a92-afd4-3115f045efb7 |
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https://www.data.gouv.fr/api/1/datasets/r/eb4cf51e-699c-4361-8721-f10a9848db68 |
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https://www.data.gouv.fr/api/1/datasets/r/840a3edf-8867-4356-aebe-f568fa01b324 |
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https://www.data.gouv.fr/api/1/datasets/r/dde7aa96-443b-45e9-8a38-ed5b8452b353 |
Tags
- eau
- geologie
- eaux-souterraines
- donnees-ouvertes
- eau-souterraine
- politique-communautaire-de-lenvironnement
- artois-picardie