Flood Zone Mapping for Haute-Garonne, France, Outside Regulatory Plans

Haute-Garonne, France, contains geospatial data on natural flood risk from watercourse overflow, outside areas established under Risk Prevention Plans (RPPs). The dataset represents enveloping areas of all known floods, created by DREAL (CIZI) and refined by DDT31 with field survey data, and was last updated on July 5, III. It is intended for use at scales between 1/10,000 and 1/100,000 and has no regulatory scope.

Use Cases

• Modeling flood hazard exposure for infrastructure planning based on mapped flood zones.
• Assessing historical flood extents for risk communication based on known flood envelopes.
• Integrating non-regulatory flood data with other environmental layers for regional analysis.
• Identifying areas potentially vulnerable to watercourse overflow for preliminary studies.

Strengths

• Dataset is described as 'very complete' for the studied flood type.
• Data is refined with field survey data from DDT31.
• Last updated date is explicitly provided: 2023-07-05.

Limitations

• Mapping is not exhaustive; some small streams and heavy, localized storm floods are not included.
• Only covers floods from watercourse overflow; floods from upwelling or urban storm runoff are excluded.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

BUREAU DE RECHERCHES GÉOLOGIQUES ET MINIÈRES

Collection Method

Originally created by DREAL (CIZI) and refined by DDT31 using field survey data.

Time Range

null

Freshness

Last updated 2023-07-05 00:00:00; freshness should be verified.

Geography

Haute-Garonne, France