Risk of Flooding from Surface Water

Availability:
Not released
Published by:
Natural Resources Wales
Last updated:
17 October 2016
Topic:
Not added
Licence:
Other Licence
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Summary 

  The surface water flood maps give an indication of the broad areas likely to be at risk of surface water flooding.  This includes flooding that takes place from the surface runoff generated by rainwater (including snow and other precipitation) that:

(a) is on the surface of the ground (whether or not it is moving), and (b) has not yet entered a watercourse, drainage system or public sewer. The Flood Map for Surface Water pick out natural drainage channels, rivers, low areas in floodplains, and flow paths between buildings. But it does not indicate flooding caused by local rainfall. It does not show flooding that occurs from overflowing watercourses, drainage systems or public sewers caused by catchment-wide rainfall events or river flow. A national model has been run for 1 in 30, 1 in 100 and 1 in 1000 year rainfall events. It has been modelled on a 2 metre square grid. Lead Local Flood Authorities were consulted and where available locally held model outputs have been incorporated into the maps. This dataset has been superseded by the new National Flood Hazard Maps 2019 - NRW_DS124790

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Additional information

View additional metadata
Added to data.gov.uk
2023-06-13
Access contraints
There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Harvest GUID
4f4c4942-4343-5764-6473-313136323733
Extent
Latitude: 53.51306700° to 51.24082900°
Longitude: -5.77774100° to -2.60886500°
Spatial reference system
urn:ogc:def:crs:EPSG::BNG
Dataset reference date
2016-10-17 (publication)
Frequency of update
notPlanned
Responsible party
Natural Resources Wales (NRW) (owner, custodian); Environment Agency Wales (originator)
ISO 19139 resource type
dataset
Metadata language
eng
Source Metadata
XML
HTML

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Licence information

© CNC/NRW and Centre for Ecology and Hydrology © NERC (CEH) Some features of this information are based on digital spatial data licensed from the Centre for Ecology and Hydrology © NERC (CEH). Defra, Met Office and DARD Rivers Agency © Crown copyright. © Cranfield University. © James Hutton Institute. Contains OS data © Crown copyright and database right 2015. Land and Property Services © Crown copyright and database right. Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and copyright of the owners. It is the recipient's responsibility to ensure the data is fit for the intended purpose.