4f4c4942-4343-5764-6473-313136323537 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-06-25T14:08:59.288Z NRW 1.0 wel NONE Risk of Flooding from Reservoirs Risk of Flooding from Reservoirs AfA180 Reservoir Flood Map - Spatial Data Perygl o lifogydd o gronfeydd dŵr 2017-04-01 NRW_DS116257 NRW is responsible for assuring the safety of the Welsh reservoirs by enforcing the Reservoirs Act 1975. Simplified inundation mapping was carried out nationally by the Environment Agency to provide a baseline assessment of all reservoirs falling within the Act. This work is now carried out by Natural Resources Wales (NRW). Reservoirs Flood Maps – Spatial Data are referred to externally as Risk of Flooding from Reservoirs. NRW is responsible for assuring the safety of the Welsh reservoirs by enforcing the Reservoirs Act 1975. Simplified inundation mapping was carried out nationally by the Environment Agency to provide a baseline assessment of all reservoirs falling within the Act. This work is now carried out by Natural Resources Wales (NRW). Reservoirs Flood Maps – Spatial Data are referred to externally as Risk of Flooding from Reservoirs. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Environment Agency (EA) Millbank Tower, 25th Floor, 21//24 Millbank, London, SW1P 4XL, England enquiries@environment-agency.gov.uk http://www.environment-agency.gov.uk/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural risk zones GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme flood modelling NRW Thesaurus 2026-03-04 geonetwork.thesaurus.local.theme.converted_nrw-keywords SeaDataNet Parameter Discovery Vocabulary 2024-06-19 geonetwork.thesaurus.external.theme.rdf+xml Hydrological Processes (SMNR) Ecosystem (SMNR) Water Quality (SMNR) Management Areas (SMNR) Freshwater and Wetlands (SMNR) Water Resources (SMNR) Sustainable Management of Natural Resources (SMNR) Natural Resources (Incl. Features and Processes) (SMNR) NRW SMNR Keywords 2024-06-26 geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords Access to this data may be restricted under relevant legislation. NRW may NOT publish or disseminate the data. Requests should be referred to NRW's Access to Information Officer. no limitations © CNC/NRW NRW does NOT grant permission to third parties to re-use or disseminate this dataset. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. English inlandWaters SeaVoX Vertical Co-ordinate Coverages 2021-01-06 Wales (WLS) -5.777741 -2.608865 51.240829 53.512067 2013-04-01 2015-12-31 Geographic Information System Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false The detailed outputs show the potential flood risk if reservoirs were breached. The models were created at various resolutions ranging from 10 metre cells through to 50 metre squares for locations furthest away from the breach. These files are not available as a single, discrete file since each reservoir has been modelled individually. It should be noted that these model outputs are for emergency planning purposes and are not intended to reflect the most detailed flood extents. As such these data show the absolute maximum flood where there is likely to be an impact. The detailed outputs show the potential flood risk if reservoirs were breached. The models were created at various resolutions ranging from 10 metre cells through to 50 metre squares for locations furthest away from the breach. These files are not available as a single, discrete file since each reservoir has been modelled individually. It should be noted that these model outputs are for emergency planning purposes and are not intended to reflect the most detailed flood extents. As such these data show the absolute maximum flood where there is likely to be an impact.