Reservoir Flood Map Maximum Flood Outline Extent

Data layer showing individual reservoir flood maps for 225 Large Raised Reservoirs including attributed data. Individual reservoirs may have up to 5 flood maps associated with them, based on separate breach locations. The data shows the maximum extent of flood should the reservoir be breached, although the location of the reservoir can be inferred it is not explicitly shown on the maps. Reservoir flooding is extremely unlikely to happen. There has been no loss of life in the UK from reservoir flooding since 1925. All large reservoirs must be inspected and supervised by reservoir panel engineers. As the enforcement authority for the Reservoirs Act 1975 in Wales, we ensure that reservoirs are inspected regularly and essential safety work is carried out. An online viewable version of this dataset is available here: https://www.naturalresourceswales.gov.uk/our-evidence-and-reports/maps/flood-risk-map/?lang=en

Identification

Identifier
NRW_DS116250
Alternative Title
  • AFA113 Reservoir Flood Map Maximum Flood Outline (Extent)
  • Map Llifogydd sy’n Amlinellu Maint Eithaf Llifogydd o Gronfeydd Dŵr
Metadata Language
English
Lineage

The Reservoir Flood Map Outline (Extent) shows the largest area that might be flooded if a reservoir were to fail and release the water it holds. Since this is a prediction of a credible worst case scenario, it’s unlikely that any actual flood would be this large. These data are intended for emergency planning only and are not reliable for large scale flood risk assessments. Please note that only flood maps for large reservoirs are displayed. Flood maps are not displayed for smaller reservoirs or for reservoirs commissioned after reservoir mapping began in spring 2009.
Additional Information

https://www.naturalresourceswales.gov.uk/our-evidence-and-reports/maps/flood-risk-map/?lang=en

Dataset Reference Date (Publication)
2020-10-27
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 

Extent

Extent

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


 
 

Distribution

Format Type and Description
  • Geographic Information System ()

    Specification

    ESRI GIS Format

 

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

The Reservoir Flood Map Outline (Extent) shows the largest area that might be flooded if a reservoir were to fail and release the water it holds. Since this is a prediction of a credible worst case scenario, it’s unlikely that any actual flood would be this large. These data are intended for emergency planning only and are not reliable for large scale flood risk assessments. Please note that only flood maps for large reservoirs are displayed. Flood maps are not displayed for smaller reservoirs or for reservoirs commissioned after reservoir mapping began in spring 2009.
 

Keywords

Keywords

GEMET - INSPIRE themes, version 1.0
Type
Theme

Citation

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

Keywords

Integrated Public Sector Vocabulary
  • reservoirs
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)
  • Ecosystem (SMNR)
  • Sustainable Management of Natural Resources (SMNR)
  • Flooding (SMNR)
  • Water Resources (SMNR)
  • Management Areas (SMNR)
  • Freshwater and Wetlands (SMNR)
  • Soil and Land (SMNR)
Type
Theme

Citation

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

Spatial Reference System

Code
Latitude and Longitude (EPSG::4326)
 

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

Part of this dataset is sensitive and restricted as it contains data exempt from general release under EIR. Sensitive data must be kept confidential; general release is not permitted due to national security reasons.
 

Use Constraints

Use constraints type
Other restrictions
Other constraints

© CNC/NRW Data may be re-used under provision and in line with the terms of a NRW licence.
 

Attribution Statement

Other constraints

NRW Conditional
 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313136323530 XML
Metadata Language
English
Resource type
Dataset
Metadata Date
2024-05-30T15:37:54.439Z
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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