Dataset Direct Download Service (WFS): Atlas of the flood zones of the Vesle — Minor, medium and major beds.

This mission took place from December 2008 to February 2009, it was entrusted to the Laboratoire des Ponts et Chaussées de Saint Quentin in order to realise an Atlas of the Inundatable Zones of the Vesle Valley (department of the Marne) according to the hydrogeomorphological approach. This approach consists of taking into account historical flood data on the one hand and geomorphological data of the valley concerned on the other. The hydrogeomorphological approach theoretically consists of: • an inndability mapping at 1/25 000 covering the entire line of the watercourse, • 1/10 000 punch cards covering separate areas with stakes, • an explanatory report to understand and interpret maps. For the Vesle Valley study, the low amount of historical information (lack of historical data that can be reported on the maps) and the relative homogeneity of the valley along its linear, allowed the entire Vesle line to be treated on a scale close to 1/10 000. Digital documents in GIS format were therefore made with a higher degree of accuracy than usual. Thus, this data set is an assembly of the minor, medium and major beds of the AZI of the Vesle, derived from the GIS files provided, on computer support by CETE. Genealogy: The boundaries of a hazard zone are shown on the hazard map depending on the level of the hazard. In other words, the polygon objects representing the hazard zones form a partial coverage of the area studied, each of which is a closed polygon in which hazards have the same intensity level. In other words, the criterion for dividing the hazard zones is the level of the hazard. The operating scale of the data is 1/10 000th.