WWNP Runoff Attenuation Features 1% AEP - Wales

Natural Resources Wales

Runoff Attenuation Features Potential is our best estimate of locations of high flow accumulation across the land surface or in smaller channels, where it may be possible to temporarily store water and attenuate flooding during high flows. The dataset is designed to support signposting of areas where to target enhanced storage. It is based upon the Risk of Flooding from Surface Water datasets and identifies areas of high flow accumulations for the 1% Annual Exceedance Probability surface water maps. 

The data does not does not provide information on design, which may need to consider issues such as drain-down between flood events. It is important to note that land ownership and change to flood risk have not been considered. Locations identified may have more recent building or land use than available.

Attribution statement

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.

You may be interested in the following interactive maps on Lle -

See metadata

Description Type Endpoint
Web Map Service (WMS) WMS http://lle.gov.wales/services/wms/nrw (inspire-nrw:NRW_WWWP_RUNOFF_ANTEN_1PC)
Web Feature Service (WFS) WFS http://lle.gov.wales/services/wfs/nrw (inspire-nrw:NRW_WWWP_RUNOFF_ANTEN_1PC)