Identification

Title

Flood Defence Structures

Alternative title(s)

Lleoliadau Amddiffynfeydd rhag Llifogydd

Abstract

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 are currently not able to show information for the following local authorities: Flintshire, Newport. 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.

Resource type

dataset

Resource locator

https://datamap.gov.wales/layergroups/geonode:nrw_flood_defence_structures

name: View and Download

https://datamap.gov.wales/capabilities/layergroup/4126/?access_token=67k4GhAr91AqiAXnyngsm3l40RrZII&ows_service=wms

name: Web Service

Unique resource identifier

code

125266

codeSpace

https://naturalresources.wales

Dataset language

eng

Spatial reference system

authority code

OGP

code identifying the spatial reference system

urn:ogc:def:crs:EPSG::BNG

Classification of spatial data and services

Topic category

inlandWaters

location

Keywords

Keyword set

keyword value

Natural risk zones

originating controlled vocabulary

title

reference date

date type

publication

effective date

2023-06-13

Geographic location

West bounding longitude

-5.77774100

East bounding longitude

-2.60886500

North bounding latitude

53.51306700

South bounding latitude

51.24082900

Extent

Extent group

authority code

title

reference date

date type

publication

effective date

2023-06-13

code identifying the extent

Wales (WLS)

Temporal reference

Temporal extent

Begin position

1900-01-31

End position

2023-06-13

Dataset reference date

date type

publication

effective date

2023-06-06

Frequency of update

biannually

Quality and validity

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 Gwynedd Council Isle of Anglesey CC Merthyr Tydfil CBC Monmouthshire CC Neath-Port talbot CBC 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 no t 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 We are currently not able to show information for the following local authorities: Flintshire, and Newport, If you have any queries or concerns about location, maintenance, condition or records of flood assets, check with the owner or maintainer.

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

© CNC/NRW. 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.

Constraint set

Limitations on public access

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

Responsible organisations

Responsible party

organisation name

Natural Resources Wales (NRW)

telephone number

0300 065 3000

email address

enquiries@naturalresourceswales.gov.uk

responsible party role

owner

Responsible party

organisation name

Natural Resources Wales (NRW)

telephone number

0300 065 3000

email address

enquiries@naturalresourceswales.gov.uk

responsible party role

originator

Metadata on metadata

Metadata point of contact

organisation name

Natural Resources Wales (NRW)

telephone number

0300 065 3000

email address

enquiries@naturalresourceswales.gov.uk

responsible party role

pointOfContact

Metadata date

2023-06-12

Metadata language