Identification

Title

Reservoir Flood Extents - Dry Day (National)

Alternative title(s)

Abstract

This data shows the individual flood extents for all large raised reservoirs in the event that they were to fail and release the water held on a “dry day” when local rivers are at normal levels. It represents a prediction of a credible worst case scenario, however it’s unlikely that any actual flood would be this large. The data gives no indication of the likelihood or probability of reservoir flooding. Flood extents are not included for smaller reservoirs or for reservoirs commissioned after the reservoir modelling programme began in October 2016. Attribution statement: © Environment Agency copyright and/or database right 2023. All rights reserved.

Resource type

dataset

Resource locator

https://environment.data.gov.uk/api/file/download?fileDataSetId=7edac58e-e2d7-4421-801b-c18a580e7210&fileName=Data Version.txt

protocol: http

name: Data Version.txt

description: Data Version.txt download on Defra Data Services Platform

https://environment.data.gov.uk/api/file/download?fileDataSetId=7edac58e-e2d7-4421-801b-c18a580e7210&fileName=Reservoir_Flood_Extents_Dry_Day.lyr

protocol: http

name: Reservoir_Flood_Extents_Dry_Day.lyr

description: Reservoir_Flood_Extents_Dry_Day.lyr download on Defra Data Services Platform

https://environment.data.gov.uk/api/file/download?fileDataSetId=7edac58e-e2d7-4421-801b-c18a580e7210&fileName=Reservoir_Flood_Maps_Data_Guide.pdf

protocol: http

name: Reservoir_Flood_Maps_Data_Guide.pdf

description: Reservoir_Flood_Maps_Data_Guide.pdf download on Defra Data Services Platform

https://environment.data.gov.uk/explore/c66ee97f-49d2-454e-9a19-d48a47bd22ad?download=true

protocol: http

name: Reservoir_Flood_Extents_Dry_Day_download

description: Download data by area of interest

http://environment.data.gov.uk/spatialdata/reservoir-flood-extents-dry-day/wms

protocol: http

name: Reservoir_Flood_Extents_Dry_Day_WMS

description: Reservoir Flood Extents - Dry Day WMS

http://environment.data.gov.uk/spatialdata/reservoir-flood-extents-dry-day/wfs

protocol: http

name: Reservoir_Flood_Extents_Dry_Day_WFS

description: Reservoir Flood Extents - Dry Day WFS

https://environment.data.gov.uk/spatialdata/reservoir-flood-extents-dry-day/ogc/features/v1

protocol: http

name: OGC API - Features service

description: OGC API - Features service

Unique resource identifier

code

c66ee97f-49d2-454e-9a19-d48a47bd22ad_resource

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

http://www.opengis.net/def/crs/EPSG/0/27700

Classification of spatial data and services

Topic category

environment

Keywords

Keyword set

keyword value

Flood Risk

Flood risk assessment

Reservoirs

environment

Keyword set

keyword value

mapping

originating controlled vocabulary

title

reference date

date type

publication

effective date

2010-01-13

Keyword set

keyword value

modelling

originating controlled vocabulary

title

reference date

date type

publication

effective date

2010-01-13

Keyword set

keyword value

flood

originating controlled vocabulary

title

reference date

date type

publication

effective date

2010-01-13

Keyword set

keyword value

reservoir

originating controlled vocabulary

title

reference date

date type

publication

effective date

2010-01-13

Geographic location

West bounding longitude

-6.236

East bounding longitude

2.072

North bounding latitude

55.816

South bounding latitude

49.943

Temporal reference

Temporal extent

Begin position

2021-09-02

End position

2099-12-31

Dataset reference date

date type

creation

effective date

2021-09-02

date type

revision

effective date

2025-03-11

Frequency of update

quarterly

Quality and validity

Lineage

In 2010 the Environment Agency published the National Reservoir Inundation Maps. The maps provide an indication of the flooding that would occur if a failure of a reservoir embankment or structure led to an uncontrolled release of water. The Environment Agency has reviewed, updated and improved the reservoir flood maps as part of the Reservoir Flood Mapping Project. The maps show the extent of flooding for 1865 large-raised reservoirs that were in operation in October 2016. New reservoirs after that date will be modelled under the next review of the flood maps, which is due in by 2025.

Conformity

Data format

name of format

Open format | Shapefile (SHP)

version of format

Constraints related to access and use

Constraint set

Use constraints

Open Government Licence

Constraint set

Limitations on public access

There are no public access constraints to this data. Use of this data is subject to the licence identified.

Constraint set

Use constraints

Constraint set

Limitations on public access

There are no public access constraints to this data. Use of this data is subject to the licence identified.

Responsible organisations

Responsible party

organisation name

Environment Agency

email address

DSPcustomerforum@environment-agency.gov.uk

web address

https://environment.data.gov.uk/support

description: Defra Data Services Forum

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

Environment Agency

email address

DSPcustomerforum@environment-agency.gov.uk

responsible party role

pointOfContact

Metadata date

2025-03-11

Metadata language