Risk of Flooding from Surface Water

• Availability: Not released
• Published by: Natural Resources Wales
• Last updated: 22 June 2023
• Topic: Not added
• Licence: Other Licence ; View licence information

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 This dataset has been superseded by the new National Flood Hazard Maps 2019 - NRW_DS124790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

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• 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 °
• Extent: 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
• Source Metadata: HTML

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Licence information

\u00a9 CNC/NRW and Centre for Ecology and Hydrology \u00a9 NERC (CEH) Some features of this information are based on digital spatial data licensed from the Centre for Ecology and Hydrology \u00a9 NERC (CEH). Defra, Met Office and DARD Rivers Agency \u00a9 Crown copyright. \u00a9 Cranfield University. \u00a9 James Hutton Institute. Contains OS data \u00a9 Crown copyright and database right 2015. Land and Property Services \u00a9 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.