Identification

Title

Risk of Flooding from Surface Water

Alternative title(s)

Abstract

Risk of Flooding from Surface Water (RoFSW) map is an assessment of where surface water flooding may occur when rainwater does not drain away through the normal drainage systems or soak into the ground, but lies on or flows over the ground instead. It includes information about flooding extents and depths. It is produced using national scale modelling and enhanced with compatible, locally produced modelling from lead local flood authorities (LLFAs). RoFSW is a probabilistic product, meaning that it shows the overall risk, rather than the risk associated with a specific event or scenario. In externally published versions of this dataset, risk is displayed as one of three likelihood bandings: High - greater than or equal to 3.3% chance in any given year (1 in 30) Medium - less than 3.3% (1 in 30) but greater than or equal to 1% (1 in 100) chance in any given year Low - less than 1% (1 in 100) chance in any given year NB. This is a complex dataset, with preview available only on certain zoom levels. The Web Mapping service has been set to 1:50 000 in the <MaxScaleDenominator> attribute. The services are set to be visible from the 1:50 000 scale range. There may be some variation, since end client software may interpret the request differently. Attribution statement: © Environment Agency copyright and/or database right 2025. All rights reserved.

Resource type

dataset

Resource locator

https://environment.data.gov.uk/api/file/download?fileDataSetId=cc656e03-b60c-4ed3-987c-77e2d39343bf&fileName=RoFSW Product Description.pdf

protocol: http

name: RoFSW Product Description.pdf

description: RoFSW Product Description.pdf download on Defra Data Services Platform

https://environment.data.gov.uk/api/file/download?fileDataSetId=cc656e03-b60c-4ed3-987c-77e2d39343bf&fileName=RoFSW_4band.lyr

protocol: http

name: RoFSW_4band.lyr

description: RoFSW_4band.lyr download on Defra Data Services Platform

https://environment.data.gov.uk/spatialdata/nafra2-risk-of-flooding-from-surface-water/wms

protocol: http

name: Risk of Flooding from Surface Water - WMS

description:

https://environment.data.gov.uk/explore/b5aaa28d-6eb9-460e-8d6f-43caa71fbe0e?download=true

protocol: http

name: Download data by area of interest

description:

Unique resource identifier

code

990754b9-5cbc-4494-9660-82f75f1ef982_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

inlandWaters

Keywords

Keyword set

keyword value

Flood Risk Management

surface waters

environment

inlandWaters

Keyword set

keyword value

Natural risk zones

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

risk

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

End position

2099-12-31

Dataset reference date

date type

creation

effective date

2024-10-30

date type

publication

effective date

2025-01-28

date type

revision

effective date

2024-10-30

Frequency of update

quarterly

Quality and validity

Lineage

RoFSW is created using a combination of local flood model information and national flood modelling. These are used to generate the probabilities of flood risk for each 2m grid square of land, with the aim of using the best available flood risk information in any one location.

Conformity

Data format

name of format

Proprietary format | ESRI File based Geodatabase (GDB)

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

2025-01-28

Metadata language