Reference profiles with water level ratings expressed in NGF meters were positioned with an altimeter deviation of about 20 cm during hydraulic modeling for the centennial flood hazard. The dataset was produced by the Bureau de Recherches Géologiques et Minières and last updated on April 4, 2019. These profiles determine regulatory ratings used in interpreting PPRi regulations across the sector.
Use Cases
- Determine regulatory construction elevations based on reference water level ratings mentioned in the description
- Visualize centennial flood hazard water heights across the Aval sector using the positioned reference profiles
- Interpret PPRi regulations for habitable floors or vulnerable equipment based on the defined regulatory rating offsets
Strengths
- Reference profiles are linked to the General Level of France and expressed in a standardized NGF meter system
- Regulatory ratings are defined with specific offsets (5 cm and 30 cm) for different construction types
- Profiles are represented on official PPRi graphic documents as polylines with ratings
Limitations
- Description metadata is limited; actual data quality requires manual inspection after download
- Last updated 2019-04-04 00:00:00; freshness should be verified
- Column-level documentation is absent; field semantics must be inferred after download
Provenance
- Source
- Bureau de Recherches Géologiques et Minières
- Collection Method
- Created during hydraulic modeling for flood hazard determination and represented on PPRi graphic documents.
- Freshness
- 2019-04-04 00:00:00
- Geography
- Aval sector of the PPRi Châlons-en-Champagne area