The Flood Map for Planning (FMfP) includes climate change information to show how this will affect flood risk extents for rivers, the sea and surface water and small watercourses over the next century. It shows the potential extent of flooding assuming no defences are in place.  It also indicates areas at risk from coastal erosion, areas that have flooded in the past and key information on the location of flood defence infrastructure.

The FMfP can be considered as the best available information on flood risk and will replace the Development Advice Map for planning purposes when the Welsh Government implements the revised TAN15.  Although it currently has no official status for planning purposes it is a useful data source when considering flood risks.

The coming into force of the new TAN 15 and the Flood Map for Planning has been suspended due to a further consultation on the TAN.

Technical advice note (TAN) 15: development, flooding and coastal erosion | GOV.WALES

The Flood Zones within the FMfP shows the undefended risk of flooding from Rivers, the Sea and from Surface Water & Small Watercourses.

Flood Zone 3 displays the extent of flooding from:

  • rivers with a 1% (1 in 100) chance or greater of happening in any given year, including an allowance for climate change.
  • the sea with a 0.5% (1 in 200) chance or greater of happening in any given year, including an allowance for climate change.
  • Surface water & small watercourses with a 1% (1 in 100) chance or greater of happening in any given year, including an allowance for climate change.

Flood Zone 2 displays the extent of flooding from:

  • Rivers with less than 1% (1 in 100) but greater than or equal to 0.1% (1 in 1,000) chance of happening in any given year, including an allowance for climate change.
  • the Sea with less than 0.5% (1 in 200) but greater than or equal to 0.1% (1 in 1,000) chance of flooding in any given year, including an allowance for climate change.
  • Surface water & small watercourses with less than 1% (1 in 100) but greater than or equal to 0.1% (1 in 1,000) chance of happening in any given year, including an allowance for climate change.

The FMfP is displayed in two parts, a Basic View and a Detailed View. In the Basic View the risk of flooding from Rivers and the Sea is shown as a merged layer. In the Detailed View flood risk is separated into individual sources. In both Views Flood Zones for Surface Water & Small Watercourses are shown separately.

 Attribution Statement:

Contains Natural Resources Wales information © Natural Resources Wales and database right. All rights reserved. Some features of this information are based on digital spatial data licensed from the UK Centre for Ecology & Hydrology © UKCEH. Defra, Met Office and DARD Rivers Agency © Crown copyright. © Cranfield University. © James Hutton Institute. Contains OS data © Crown copyright and database right.

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Please refer to the licence to understand the conditions of using this data.

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  • Flood Map for Planning: Sea Flood Zones

  • Flood Map for Planning: Rivers and Sea

  • Flood Map for Planning: Surface Water and Small Water Courses Flood Zones

  • Flood Map for Planning: River Flood Zones

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Environmental resources, protection and conservation. Examples: environmental pollution, waste storage and treatment, environmental impact assessment, monitoring environmental risk, nature reserves, landscape

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Keywords:
FloodMapforPlanningFloodZones2and3
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