AZI of the tributaries of the Vilaine — Linear anthropogenic elements modifying hydrodynamics — in Loire-Atlantique

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Dataset information

Country of origin
Updated
2021.01.24 06:38
Created
2017.11.13
Available languages
French
Keywords
risques-naturels, open-data, ddtm-44, donnees-ouvertes, passerelle-inspire, zones-a-risque-naturel, loire-atlantique, grand-public, geoscientific-information
Quality scoring
195

Dataset description

These data represent the anthropogenic elements of land use likely to play a role in the hydraulic operation of the modern alluvial plain. It is; is a linear object. The study perimeter of the flood zones (AZI) of the Vilaine tributaries covers the watersheds of the Don, the Dear and the Isaac as well as all their main tributaries. Within this perimeter, all flood areas are mapped, as well as the confluences with unstudied tributaries and lateral valleys. __Origin__ L' study led by the DIREN Pays de la Loire applies to the global linear of Don, Dear and &Isac the hydrogeomorphological method for determining flood zones. This naturalistic approach based on the analysis of the forms and formations of valley bottoms makes it possible to identify the different beds of the river. It is complemented by research on historical flood archives. L' analysis s' supports the geomorphological interpretation of a stereoscopic cover of aerial photos validated by field checks. Hydrogeomorphological study consists of maps of inundability carried out on the scales of 1/25.000e and 1/10 000e for the areas at stake;L'set being carried over to a monochrome background consisting of SCAN 25 of l'I.G.N. __Partner organisations__ DDTM Loire-Atlantique [See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/9e574a9e0e669831326deec4953b4e51dbc3d92f)
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