Risk of Flooding from Rivers and Sea
Risk of Flooding from Rivers and the Sea (RoFRS) shows the chance of flooding from rivers and the sea taking into account the presence and condition of flood defences. It is our main way of communicating flood risk from rivers and sea to the public through our ‘Check Your Long Term Flood Risk’ service on gov.uk. While flood defences reduce the level of risk they do not completely remove it. For example, water can flow over the top of the defence, or they can fail in extreme weather conditions or if they are in poor condition. As a result, the RoFRS maps may show that there is risk to areas behind some flood defences. RoFRS is a probabilistic product, meaning that it shows the overall risk, rather than the risk associated with a specific event or scenario. This risk is displayed as one of four likelihood bandings: High - greater than or equal to 3.3% chance in any given year (1 in 30) Medium - less than 3.3% (1 in 30) but greater than or equal to 1% (1 in 100) chance in any given year Low - less than 1% (1 in 100) but greater than or equal to 0.1% (1 in 1,000) chance in any given year Very Low - less than 0.1% chance in any given year (1 in 1,000) This data also presents the likelihood of flooding for the following depths: 0.2m 0.3m 0.6m 0.9m 1.2m NB. This is a complex dataset, with preview available only on certain zoom levels. The Web Mapping service has been set to 1:50 000 in the <MaxScaleDenominator> attribute. The services are set to be visible from the 1:50 000 scale range. There may be some variation, since end client software may interpret the request differently. Attribution statement: © Environment Agency copyright and/or database right 2025. All rights reserved.
dataset
protocol: http
name: RoFRS Product Description.pdf
description: RoFRS Product Description.pdf download on Defra Data Services Platform
protocol: http
name: RoFRS_4band.lyr
description: RoFRS_4band.lyr download on Defra Data Services Platform
https://environment.data.gov.uk/spatialdata/nafra2-risk-of-flooding-from-rivers-and-sea/wms
protocol: http
name: Risk of Flooding from Rivers and Sea - WMS
description:
https://environment.data.gov.uk/explore/96ab4342-82c1-4095-87f1-0082e8d84ef1?download=true
protocol: http
name: Download data by area of interest
description:
483b95ca-0b21-4482-86bf-9a5397c7efa1_resource
eng
http://www.opengis.net/def/crs/EPSG/0/27700
environment
inlandWaters
oceans
Flood Risk Management
rivers
sea
environment
inlandWaters
oceans
Natural risk zones
publication
2008-06-01
risk
publication
2010-01-13
-6.236
2.072
55.816
49.943
2099-12-31
creation
2024-10-30
publication
2025-01-28
revision
2024-10-30
quarterly
RoFRS is created using a combination of local flood model information and national flood modelling. These are used to generate the probabilities of flood risk for each 2m grid square of land, with the aim of using the best available flood risk information in any one location. For particular areas, sections of a previous (50m resolution) RoFRS dataset have been retained and used. These are due to be replaced with new data in the future.
Proprietary format | ESRI File based Geodatabase (GDB)
Open Government Licence
There are no public access constraints to this data. Use of this data is subject to the licence identified.
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Environment Agency
DSPcustomerforum@environment-agency.gov.uk
https://environment.data.gov.uk/support
description: Defra Data Services Forum
pointOfContact
Environment Agency
DSPcustomerforum@environment-agency.gov.uk
pointOfContact
2025-01-28