National Flood Hazard Maps 2019
National Flood Hazard Maps 2019.lyr
Mapiau Perygl Llifogydd Cenedlaethol 2019
The National Flood Hazard and Risk Maps are based on generalised modelling only. The maps have been published to comply with the Flood Risk Regulations (2009) and the EU Directive (2007/60/EC), and used to inform the creation of Flood Risk Management plans across Wales. These maps have no official status for Planning or Insurance purposes, therefore the public and professionals are advised to use the information contained within the Flood Risk Assessment Wales Map, the Development Advice Map/ Flood Map for Planning (as appropriate) for these purposes as these will be more up-to-date and incorporate improved modelling information. The National Flood Hazard Maps have been created for 3 sources of flooding, namely, 1. Flooding from Rivers 2. Flooding from the Sea 3. Flooding from Surface Water & Small Watercourse The Maps show flood depth, velocity (speed and direction), hazard and extent for High, Medium and Low risk scenarios without raised flood defences. For Rivers and Surface Water & Small Watercourses, High risk is up to 1 in 30year; Medium risk is between 1 in 30 and 1 in 100year; and Low risk is between 1 in 100year and 1 in 1,000year Annual Exceedance Probability (AEP). For the Sea, High risk is up to 1 in 30 year; Medium risk is between 1 in 30 to 1 in 200 year; and Low risk 1 in 200 year to 1 in 1000 year. The Flooding from Surface Water & Small Watercourses dataset is a direct replacement for the earlier Updated Flood Map for Surface Water (uFMfSW), 2013 and is based on the modelling of Surface Water Catchments. Details of the modelling work to produce the new National Flood Hazard Maps are available in the supporting Information sheets.
dataset
https://datamap.gov.wales/documents/2649
name: View and Download Data
124790
https://naturalresources.wales
eng
OGP
urn:ogc:def:crs:EPSG::BNG
More information on the FRAW 2018 project can be found in the final project report JBA Consulting 2019 Flood Risk Assessment Wales Project Report. Report to Natural Resources Wales. https://cyfoethnaturiolcymru.sharepoint.com/teams/waterman/frm/ran/FRAW/2019/2018s0011%20-%20FRAW%20Project%20Report%20-%20And%20Appendices.pdf
inlandWaters
Area management/restriction/regulation zones and reporting units
publication
2023-06-14
-5.77774100
-2.60886500
53.51306700
51.24082900
publication
2023-06-14
Wales (WLS)
2019-01-01
2019-12-31
publication
2020-10-01
annually
The datasets have been created as part of the Flood Risk Assessment Wales (FRAW) 2018 project. The modelling has been undertaken on the Environment Agency Integrated Height Model (EA IHM) 2016, with input rainfall and flow estimates from the Centre for Ecology & Hydrology (CEH). Sea level estimates have been taken from the Coastal Flood Boundary Project (CFB) 2018. Currently, the data is presented to NRW via WMS and WMTS feeds from JBA Consulting.
© CNC/NRW. Some features of this information are based on digital spatial data licensed from the UK Centre for Ecology and Hydrology © UKCEH, © EA and Getmapping Plc and Bluesky International Limited (2015). Defra, Met Office and DARD Rivers Agency © Crown copyright. © Cranfield University. © James Hutton Institute. Contains OS data © Crown copyright and database right. 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.
There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Natural Resources Wales (NRW)
0300 065 3000
enquiries@naturalresourceswales.gov.uk
owner
JBA Consultancy
01756 699500
andrew.gubbin@jbaconsulting.com
originator
Natural Resources Wales (NRW)
0300 065 3000
enquiries@naturalresourceswales.gov.uk
pointOfContact
2023-06-13