Risk of Flooding from Rivers and Seas (RoFRS)

This is a national assessment of flood risk for Wales produced using local expertise. The dataset shows the chance of flooding from rivers and/or the sea, based on cells of 50 m. Each cell is allocated one of four flood risk categories, taking into account flood defences and their condition. No more detailed resolution is provided. An online Flood Risk Map Browser is available via the NRW website.

Identification

Identifier
NRW_DS116276
Alternative Title
  • Risk of Flooding from Rivers and Sea (RoFRS).LYR
  • Risk of Flooding from Rivers and Seas (RoFRS) Spatial Flood Likelihood Category Grid
  • AfA378 RoFRS Property Flood Likelihood Category Database
  • Perygl Llifogydd o Afonydd a'r Môr - Grid Categorïau Tebygolrwydd Llifogydd Gofodol
Metadata Language
English
Lineage

Spatial dataset with the floodplain split into 50m x 50m cells and each allocated one of four flood risk likelihood categories. - High: each year, there is a chance of flooding of greater than 1 in 30 (3.3 percent). - Medium: each year, there is a chance of flooding of between 1 in 30 (3.3 percent) and 1 in 100 (1 percent). - Low: each year, there is a chance of flooding of between 1 in 100 (1 percent) and 1 in 1000 (0.1 percent). - Very Low: each year, there is a chance of flooding of less than 1 in 1000 (0.1 percent). Cells where the likelihood of flooding is greater than or equal to 1 in 75 (1.3 percent) each year are identified. Each cell has a suitability rating to show at what scale it is generally appropriate to use the data to assess flood risk, and how suitable the data is for a range of different uses. If data is displayed in map form to others it should be shown with a maximum zoom scale of 1:10,000 and that base mapping of 1:25,000 is used to give context. Risk of Flooding from Rivers and Seas (RoFRS) results are indicative of the scale and distribution of the likelihood of flooding and therefore we advise that viewing at more detailed scales may not be appropriate. - Because of the way they have been produced and the fact that they are indicative, the maps are not appropriate to act as the sole evidence for any specific planning or regulatory decision or assessment of risk in relation to flooding at any scale without further supporting studies or evidence. - This data is not raw, factual or measured. It comprises of estimated or modelled results showing expected outcomes based on the data available to us.
Dataset Reference Date (Publication)
2017-09-20
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Environment Agency Wales
Environment Agency Wales, Cambria House, 29 Newport Road, Cardiff, CF24 0TP
http://www.environment-agency.gov.uk/regions/wales
 

Extent

Extent

Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

Distribution

Format Type and Description
  • Geographic Information System ()

    Specification

    ESRI Feature Class

Resource Locator
Download Data and Web Service

World Wide Web page

Resource Locator
View Data

World Wide Web page

Resource Locator
Web Mapping Service

World Wide Web page

 

Quality

Data quality

Quality Scope
Dataset
Conformity
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
Explanation
Degree
false
Lineage

Spatial dataset with the floodplain split into 50m x 50m cells and each allocated one of four flood risk likelihood categories. - High: each year, there is a chance of flooding of greater than 1 in 30 (3.3 percent). - Medium: each year, there is a chance of flooding of between 1 in 30 (3.3 percent) and 1 in 100 (1 percent). - Low: each year, there is a chance of flooding of between 1 in 100 (1 percent) and 1 in 1000 (0.1 percent). - Very Low: each year, there is a chance of flooding of less than 1 in 1000 (0.1 percent). Cells where the likelihood of flooding is greater than or equal to 1 in 75 (1.3 percent) each year are identified. Each cell has a suitability rating to show at what scale it is generally appropriate to use the data to assess flood risk, and how suitable the data is for a range of different uses. If data is displayed in map form to others it should be shown with a maximum zoom scale of 1:10,000 and that base mapping of 1:25,000 is used to give context. Risk of Flooding from Rivers and Seas (RoFRS) results are indicative of the scale and distribution of the likelihood of flooding and therefore we advise that viewing at more detailed scales may not be appropriate. - Because of the way they have been produced and the fact that they are indicative, the maps are not appropriate to act as the sole evidence for any specific planning or regulatory decision or assessment of risk in relation to flooding at any scale without further supporting studies or evidence. - This data is not raw, factual or measured. It comprises of estimated or modelled results showing expected outcomes based on the data available to us.
 

Keywords

Keywords

GEMET - INSPIRE themes, version 1.0
Type
Theme

Citation

Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus
  • flood prevention (flood protection) (flood management)
  • flood modelling
Type
Theme

Citation

Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

Integrated Public Sector Vocabulary
  • risk management
Type
Theme

Citation

Date (Revision)
2013-04-03
Code
geonetwork.thesaurus.external.theme.subjects

Keywords

NRW SMNR Vocabulary
  • Natural Resources (incl. Features and Processes) (SMNR)
  • Coastal Margins (SMNR)
  • Ecosystem (SMNR)
  • Sustainable Management of Natural Resources (SMNR)
  • Sea and Coast (SMNR)
  • Management Areas (SMNR)
  • Flooding (SMNR)
  • Soil and Land (SMNR)
  • Physical Geography (physiography) (SMNR)
  • Hydrological Processes (SMNR)
  • Freshwater and Wetlands (SMNR)
Type
Theme

Citation

Date (Revision)
2023-12-27
Code
geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Content Information

NRW Profile

Custom Elements

 

Constraints

Constraints

Limitations on Public Access and Use

Restriction type
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Use constraints type
Other restrictions
Other constraints

© CNC/NRW and 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.
 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313136323736 XML
Metadata Language
English
Resource type
Dataset
Metadata Date
2024-05-30T15:17:20.314Z
Metadata Standard Name
NRW
Metadata Standard Version

1.0

pointOfContact
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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