Flood Defence Structures

The National Flood Asset Database records flood infrastructure in Wales managed by Lead Local Flood Authorities (LLFAs) and Natural Resources Wales (NRW). It includes many embankments, walls, flood gates, culverts, and inlet screens (which catch debris), but not all flood infrastructure maintained or owned by these parties. This infrastructure has been constructed to help manage the risk of flooding from rivers and the sea. They do not remove the risk of flooding and can be overtopped, blocked, or fail in extreme weather conditions. Three datasets are available as open data. 1. Flood defence Locations. These show the linear alignment of flood defence asset that have been built to protect against flooding from rivers and the sea. It includes the type, length, maintainer, and an ID. These defence locations are also shown in Flood Risk Assessment Wales (FRAW), Flood Map for Planning (FMfP) and Find flood defence structures near you maps. They may relate to an Area Benefiting from Flood Defence (FRAW) and TAN15 zone (FMfP). 2. Culverts (Polyline); These show an indicative location of underground culverts for general guidance only. Attributes include maintainer, owner, length and ID. Due to the underground nature and history of many culverts, the locations may not be accurate, complete, or up to date. 3. Culvert openings and Screens (Points). These show an indicative location of culvert openings and screens (often referred to as Trash or Debris Screens). Attributes include maintainer, owner and ID. Locations and details may not be accurate, complete or up to date. We will regularly update the information when new and improved data becomes available. If you have any queries or concerns about location, maintenance, condition, or records of flood assets, check with the owner or maintainer.

Identification

Identifier
NRW_DS125266
Alternative Title
  • Lleoliadau Amddiffynfeydd rhag Llifogydd
Metadata Language
English
Lineage

This dataset is based on the geographical location of flood assets in Wales and stems from measures 6, 7 and 8 of the National Flood Strategy that aims to bring this data together and make it publicly accessible. The data is taken from asset management systems managed by Natural Resources Wales and the following Lead Local Flood Authorities. Blaenau Gwent CBC Bridgend CBC Caerphilly CBC Cardiff Council Carmarthenshire CC Ceredigion CC City & County of Swansea Conwy CBC Denbighshire CBC Flintshire CC Gwynedd Council Isle of Anglesey CC Merthyr Tydfil CBC Monmouthshire CC Neath-Port talbot CBC Newport CC Pembrokeshire CC Powys CC Rhondda cynon Taff CBC Torfaen CBC Vale of Glamorgan Council Wrexham CBC The position of flood assets is for general guidance only. It does not show all flood assets or any coastal erosion/ protection managed by these bodies. Some of the data may be inaccurate or out-of-date. Some of the underground assets might not be known or recorded accurately. If you have any queries or concerns about location, maintenance, condition or records of flood assets, check with the owner or maintainer.
Dataset Reference Date (Publication)
2023-11-30
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

Distribution

Format Type and Description
  • Geographic Information System ()

    Specification

    ArcGIS format

Resource Locator
View and Download

World Wide Web page

Resource Locator
Web 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

This dataset is based on the geographical location of flood assets in Wales and stems from measures 6, 7 and 8 of the National Flood Strategy that aims to bring this data together and make it publicly accessible. The data is taken from asset management systems managed by Natural Resources Wales and the following Lead Local Flood Authorities. Blaenau Gwent CBC Bridgend CBC Caerphilly CBC Cardiff Council Carmarthenshire CC Ceredigion CC City & County of Swansea Conwy CBC Denbighshire CBC Flintshire CC Gwynedd Council Isle of Anglesey CC Merthyr Tydfil CBC Monmouthshire CC Neath-Port talbot CBC Newport CC Pembrokeshire CC Powys CC Rhondda cynon Taff CBC Torfaen CBC Vale of Glamorgan Council Wrexham CBC The position of flood assets is for general guidance only. It does not show all flood assets or any coastal erosion/ protection managed by these bodies. Some of the data may be inaccurate or out-of-date. Some of the underground assets might not be known or recorded accurately. If you have any queries or concerns about location, maintenance, condition or records of flood assets, check with the owner or maintainer.
 

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 risk management
  • flood risk
  • physical geography
  • flood defence
Type
Theme

Citation

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

Keywords

Integrated Public Sector Vocabulary
  • risk management
  • risk assessment
Type
Theme

Citation

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

Keywords

NRW SMNR Vocabulary
  • Sea and Coast (SMNR)
  • Sustainable Management of Natural Resources (SMNR)
  • Coastal Margins (SMNR)
  • Ecosystem (SMNR)
  • Flooding (SMNR)
  • Management Areas (SMNR)
  • Natural Resources (incl. Features and Processes) (SMNR)
  • Hydrological Processes (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
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 & © Welsh Local Authorities. Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
 

Attribution Statement

Other constraints
Open Government Licence (OGL)
 

Licence

Other constraints
Open Government Licence (OGL)
 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313235323636 XML
Metadata Language
English
Resource type
Dataset
Metadata Date
2024-05-30T15:17:12.515Z
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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