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.

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

Temporal Extent

Begin date: 2009-01-01

End date: 2014-12-31

Topic category

Inland waters
Environment

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

Geographic Extent: Wales (WLS)

Distribution

Format Type and Description

Geographic Information System 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

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

GEMET - INSPIRE themes, version 1.0

Natural risk zones

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

Code: British National Grid (EPSG::27700)

Content Information

NRW Profile

Custom Elements

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

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

Access the portal

Full access to the portal and metadata.

Risk of Flooding from Rivers and Seas (RoFRS)

Identification

Temporal Extent

Extent

Extent

Distribution

Distribution

Quality

Data quality

Keywords

Keywords

Citation

Keywords

Citation

Keywords

Citation

Keywords

Citation

Spatial Reference System

Content

Content Information

NRW Profile

Custom Elements

Constraints

Constraints

Limitations on Public Access and Use

Access Constraints Directive

Access Constraints Text

Use Constraints

Metadata

Metadata

Publishing Body