Flood Map for Planning (FMfP) TAN15 Defended Zones

Natural Resources Wales

The Flood Map for Planning (FMfP) supports Welsh Government planning policy on flood risk and is the starting point for consideration of flood risk in the planning system. It provides an indication to which land is at risk of flooding from rivers, the sea and surface water and small watercourses, taking account the impacts of climate change over the next 100 years. The FMfP is the key dataset to inform and guide decision making about future development. 

The TAN15 Defended Zone show locations that benefit from significant flood defence infrastructure and are cut to the limit of Flood Zone 2 (1 in 1000 plus climate change).

TAN15 Defended Zones have been created for the areas behind flood defences managed and maintained by Risk Management Authorities that have a minimum, Present Day Standard of Protection of:

  • 1% (1 in 100) annual event probability (AEP) for rivers, or
  • 0.5% (1 in 200) annual event probability (AEP) for the sea

TAN15 Defended Zones are created for individual sources of flooding (i.e. Rivers or Sea).

There are no TAN15 Defended Zones for Surface Water & Small Watercourses.

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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Flooding Spatial data

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Flood Map for Planning (FMfP) TAN15 Defended Zones Various / Other https://naturalresourceswales.sharefile.eu/d-s65833ce8d32a4787973a6b2643a38fb3