Identification

Title

Working with Natural Processes (WWNP) in Wales: Runoff Attenuation Features 3.3% AEP

Alternative title(s)

WWNP Runoff Attenuation Features 3.3% AEP - Wales

Nodweddion Arafu Dŵr Ffo 3.3% AEP WWNP - Cymru

Abstract

Runoff Attenuation Features Potential is our best estimate of locations of high flow accumulation across the land surface or in smaller channels, where it may be possible to temporarily store water and attenuate flooding during high flows. The dataset is designed to support signposting of areas to target enhanced storage. It is based upon the Risk of Flooding from Surface Water datasets and identifies areas of high flow accumulations for the 3.3% Annual Exceedance Probability surface water maps. The areas of ponding or accumulation are between 100 and 5000 metres squared, and have been tagged where they fall on an area of slope steeper than 6% as gully blocking opportunities. All the potential areas have been constrained so that they are not in urban areas or on roads, rails or canal s.

Resource type

dataset

Resource locator

https://datamap.gov.wales/layers/inspire-nrw:NRW_WWWP_RUNOFF_ANTEN_3PC

name: View and Download Data

https://datamap.gov.wales/capabilities/layer/506/?access_token=i61nd1X0RwdwAgQrGW0sqAsWxBMiwx&ows_service=wms

name: Web Mapping Service

Unique resource identifier

code

121363

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

environment

Keywords

Keyword set

keyword value

Land use

originating controlled vocabulary

title

reference date

date type

publication

effective date

2023-02-01

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

2023-02-01

code identifying the extent

Wales (WLS)

Temporal reference

Temporal extent

Begin position

2018-01-01

End position

2018-03-12

Dataset reference date

date type

publication

effective date

2018-03-12

Frequency of update

notPlanned

Quality and validity

Lineage

The data does not does not provide information on design, which may need to consider issues such as drain-down between flood events. It is important to note that land ownership and change to flood risk have not been considered. Locations identified may have more recent building or land use than available. Further information on the Working with Natural Processes project, including a mapping user guide, can be found in the reports published here: https://www.gov.uk/government/publications/working-with-natural-processes-to-reduce-flood-risk JBA Consulting carried out the contract.

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

© CNC/NRW. Some features of this information are based on digital spatial data licensed from the Centre for Ecology & Hydrology © NERC (CEH). 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

2023-01-31

Metadata language