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.极端洪灾风险对应马恩水库大坝（流量1000立方米/秒）发生故障时，百年一遇洪水所淹没的额外区域。 本次马恩河百年一遇洪水洪灾风险制图工作，系PPRi——香槟沙隆（Châlons-en-Champagne）片区开发项目的组成部分，依据2011年7月1日省长令开展。该区域涉及谢尔维尔境内马恩河畔肖塞（Chaussée-sur-Marne）的32个市镇。 本数字制图不具备法规效力。