Dataset Direct Download Service (WFS): Exceptional flood hazard for a centennial flood of the Marne — Flood risk prevention plan Châlons-en-Champagne sector (department de la Marne)

The exceptional hazard corresponds to the additional area that would be flooded for a centennial flood in the event of a malfunction of the Marne reservoir dam (flow rate of 1 000 m³/s). Mapping of the flood hazard for a centennial flood of the Marne carried out as part of the development of the PPRi — Châlons-en-Champagne sector (prefectural decrees of 1 July 2011). This area concerns 32 communes of Chaussée-sur-Marne in Cherville. This digital mapping is not regulatory in nature.极端洪水风险区域指马恩水库大坝发生故障（泄洪流量1000立方米/秒）时，百年一遇洪水将额外淹没的范围。本次马恩河百年一遇洪水风险制图，系PPRi——香槟沙隆区域编制工作的组成部分，制图依据为2011年7月1日法国省长令。该区域涉及谢尔维尔境内马恩河畔肖塞的32个市镇。本数字制图不具备法定效力。