Map Viewing Service (WMS) of the dataset: PPRi Châlons-en-Champagne Regulatory Zoning Reference Profiles — CAC upstream sector

During hydraulic modelling, the centennial flood hazard was determined on the area. In addition to the envelope of this hazard, the water levels over the entire sector could be determined. In order to visualise these water heights, a set of profile, known as “reference profiles”, was positioned with an altimeter deviation of about 20 cm. All of these ratings are linked to the General Level of France and are expressed in NGF meter. The by-law distinguishes for each area the construction projects to be above or below the regulatory rating. The regulatory rating is defined in the regulations as the reference rating increased by 5 cm for habitable or functional floor surfaces as well as for the use of water-resistant materials, and 30 cm for vulnerable equipment, including electrical installations. The reference rating to be used is indicated on the regulatory zoning maps, it must be searched immediately upstream of the site. Genealogy: The reference profiles are represented on the PPRi graphic documents. They are represented by polylines with a rating in NGF meter. These ratings will determine the regulatory ratings used in the interpretation of the IPP Regulations. The profiles are located throughout the PPRi sector.在水力建模过程中，已针对该区域确定了百年一遇洪水风险。除该风险的包络范围外，还可确定整个片区的水位。为可视化呈现这些水位高度，设置了一组名为"参考剖面（reference profiles）"的剖面，其高程偏差约为20厘米。所有此类高程值均以法国通用高程基准（General Level of France）为基准，单位为NGF米（NGF meter）。 本行政规章针对各区域区分了需高于或低于合规高程值的建设项目。规章中明确：合规高程值的确定规则为，针对居住或功能用房地面以及采用防水材料的场景，取参考高程值上浮5厘米；针对包括电气装置在内的易受淹设备，则取参考高程值上浮30厘米。所需采用的参考高程值会标注在管控区划图上，且需在场址紧邻上游处查询获取。 溯源说明：参考剖面将展示于PPRi图形文档中，以带有NGF米高程值的多段线（polylines）形式呈现。此类高程值将用于确定解读IPP条例（IPP Regulations）时所需的合规高程值。所有参考剖面均覆盖整个PPRi管控片区。