49 datasets found
  1. g

    Flood Map for Planning (Rivers and Sea) - Flood Zone 2

    • gimi9.com
    • data.catchmentbasedapproach.org
    • +1more
    Updated Dec 14, 2024
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    (2024). Flood Map for Planning (Rivers and Sea) - Flood Zone 2 [Dataset]. https://gimi9.com/dataset/uk_flood-map-for-planning-rivers-and-sea-flood-zone-2
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    Dataset updated
    Dec 14, 2024
    License

    CC0 1.0 Universal Public Domain Dedicationhttps://creativecommons.org/publicdomain/zero/1.0/
    License information was derived automatically

    Description

    The Flood Map for Planning (Rivers and Sea) includes several layers of information. This dataset covers Flood Zone 2 and should not be used without Flood Zone 3. It is our best estimate of the areas of land at risk of flooding, when the presence of flood defences are ignored and covers land between Zone 3 and the extent of the flooding from rivers or the sea with a 1 in 1000 (0.1%) chance of flooding each year. This dataset also includes those areas defined in Flood Zone 3. This dataset is designed to support flood risk assessments in line with Planning Practice Guidance ; and raise awareness of the likelihood of flooding to encourage people living and working in areas prone to flooding to find out more and take appropriate action. The information provided is largely based on modelled data and is therefore indicative rather than specific. Locations may also be at risk from other sources of flooding, such as high groundwater levels, overland run off from heavy rain, or failure of infrastructure such as sewers and storm drains. The information indicates the flood risk to areas of land and is not sufficiently detailed to show whether an individual property is at risk of flooding, therefore properties may not always face the same chance of flooding as the areas that surround them. This is because we do not hold details about properties and their floor levels. Information on flood depth, speed or volume of flow is not included. NOTE: We have paused quarterly updates of this dataset. Please visit the “Pause to Updates of Flood Risk Maps” announcement on our support pages for further information. We will provide notifications on the Flood Map for Planning website to indicate where we have new flood risk information. Other data related to the Flood Map for Planning will continue to be updated, including data relating to flood history, flood defences, and water storage areas. Attribution statement: © Environment Agency copyright and/or database right 2023. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2023 OS AC0000807064.

  2. a

    Risk of Flooding from Surface Water Extent: 3.3 percent annual chance

    • arc-gis-hub-home-arcgishub.hub.arcgis.com
    • data.catchmentbasedapproach.org
    Updated Sep 14, 2023
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    Environment Agency (2023). Risk of Flooding from Surface Water Extent: 3.3 percent annual chance [Dataset]. https://arc-gis-hub-home-arcgishub.hub.arcgis.com/datasets/environment::risk-of-flooding-from-surface-water-rofsw-extents?layer=0
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    Dataset updated
    Sep 14, 2023
    Dataset authored and provided by
    Environment Agency
    Area covered
    Description
    Surface water flooding happens 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. Managing the risk of flooding from surface water is the responsibility of lead local flood authorities (LLFA). The LLFA is the unitary authority or if there is no unitary authority, the county council for the area.

    The Environment Agency (EA) is responsible for publishing surface water flood risk maps however mapping of surface water flood risk areas is responsibility of LLFAs. We, the EA, produced the Risk of Flooding from Surface Water (RoFSW) map on behalf of LLFAs, using their input and information. It assesses flooding scenarios as a result of rainfall with a 3.3% (1 in 30), 1% (1 in 100), or 0.1% (1 in 1000) chance of occurring each year. Although surface water flood risk information is not suitable for identifying whether an individual property will flood it does gives an indication of the broad areas likely to be affected.

    Licence:

    Information Warnings: Risk of Flooding from Surface Water is not to be used at property level. If the Content is displayed in map form to others we recommend it should not be used with basemapping more detailed than 1:10,000 as the data is open to misinterpretation if used as a more detailed scale. Because of the way they have been produced and the fact that they are indicative, the maps are not appropriate to act as the sole evidence for any specific planning or regulatory decision or assessment of risk in relation to flooding at any scale without further supporting studies or evidence.

  3. Risk of Flooding from Rivers and Sea - Postcodes in Areas at Risk

    • environment.data.gov.uk
    Updated Jul 23, 2024
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    Environment Agency (2024). Risk of Flooding from Rivers and Sea - Postcodes in Areas at Risk [Dataset]. https://environment.data.gov.uk/dataset/8dae18e1-d465-11e4-8e78-f0def148f590
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    Dataset updated
    Jul 23, 2024
    Dataset authored and provided by
    Environment Agencyhttps://www.gov.uk/ea
    License

    Open Government Licence 3.0http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
    License information was derived automatically

    Description

    PLEASE NOTE: This record has been retired. It has been superseded by: https://environment.data.gov.uk/dataset/f81508d3-cf5a-44ed-ae7e-452be665af84 This dataset is a product of a national assessment of flood risk for England produced using local expertise. It is produced using the Risk of Flooding from Rivers and Sea data which shows the chance of flooding from rivers and/or the sea, based on cells of 50m. Each cell is allocated one of four flood risk categories, taking into account flood defences and their condition.

    This dataset uses OS address data and Royal Mail postcode data to show how many properties are in each of four flood risk categories in each postcode, based simply on the category allocated to the cell that each property is in.

    NOTE: We have paused quarterly updates of this dataset. Please visit the “Pause to Updates of Flood Risk Maps” announcement on our support pages for further information. We will provide notifications on the Check Your Long-Term Flood Risk website to indicate where we have new flood risk information.

  4. g

    Risk of Flooding from Rivers and Sea - Properties in Areas at Risk

    • gimi9.com
    • brightstripe.co.uk
    • +1more
    Updated Feb 1, 2025
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    (2025). Risk of Flooding from Rivers and Sea - Properties in Areas at Risk [Dataset]. https://gimi9.com/dataset/uk_risk-of-flooding-from-rivers-and-sea-properties-in-areas-at-risk
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    Dataset updated
    Feb 1, 2025
    License

    CC0 1.0 Universal Public Domain Dedicationhttps://creativecommons.org/publicdomain/zero/1.0/
    License information was derived automatically

    Description

    This dataset is a product of a national assessment of flood risk for England produced using local expertise. This dataset is produced using the Risk of Flooding from Rivers and Sea data which shows the chance of flooding from rivers and/or the sea, based on cells of 50m. Each cell is allocated one of four flood risk categories, taking into account flood defences and their condition. This dataset uses OS data to assign one of four flood risk categories to each property, based simply on the category allocated to the cell that the property is in. Individual addresses are not provided, but OS referencing is included to enable the data to be linked to address databases. NOTE: We have paused quarterly updates of this dataset. Please visit the “Pause to Updates of Flood Risk Maps” announcement on our support pages for further information. We will provide notifications on the Check Your Long-Term Flood Risk website to indicate where we have new flood risk information. Attribution statement: © Environment Agency Copyright and/or Database Rights 2023. All rights reserved. Some of the data in the database has been produced using data licensed from the Centre for Ecology and Hydrology, © NERC. © Crown Copyright and Database Rights 2023 OS AC0000807064.

  5. a

    USDHS FEMA 100-Year Flood Zones

    • disasters.amerigeoss.org
    • disasters-usnsdi.opendata.arcgis.com
    • +6more
    Updated Apr 24, 2018
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    GeoPlatform ArcGIS Online (2018). USDHS FEMA 100-Year Flood Zones [Dataset]. https://disasters.amerigeoss.org/maps/1731d8c91fa94929b4d68fe62464adc1
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    Dataset updated
    Apr 24, 2018
    Dataset authored and provided by
    GeoPlatform ArcGIS Online
    Area covered
    Description

    This map represents Flood Insurance Rate Map (FIRM) data important for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). The National Flood Hazard Layer (NFHL) data present the flood risk information depicted on the FIRM in a digital format suitable for use in electronic mapping applications. The NFHL database is a subset of the information created for the Flood Insurance Studies (FIS) and serves as a means to archive a portion of the information collected during the FIS. The NFHL data incorporates Digital Flood Insurance Rate Map (DFIRM) databases published by Federal Emergency Management Agency (FEMA). The 100-year flood is referred to as the 1% annual exceedance probability flood, since it is a flood that has a 1% chance of being equaled or exceeded in any single year. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The 1% annual chance (base flood) is the flood that has a 1% chance of being equaled or exceeded in any year. The Special Flood Hazard area is the area subject to flooding by the 1% annual chance flood. Areas of Special Flood Hazard include Zones A, AE, AH, AO, AR, A99, D, V, VE, and X. These flood zones are explained below and reflects the severity or type of flooding in the area. A - Zone A is the flood insurance rate zone that corresponds to the 1-percent annual chance floodplains that are determined in the Flood Insurance Study by approximate methods of analysis. Because detailed hydraulic analyses are not performed for such areas, no Base Flood Elevations or depths are shown within this zone. Mandatory flood insurance purchase requirements apply. AE and A1-A30 - Zones AE and A1-A30 are the flood insurance rate zones that correspond to the 1-percent annual chance floodplains that are determined in the Flood Insurance Study by detailed methods of analysis. In most instances, Base Flood Elevations derived from the detailed hydraulic analyses are shown at selected intervals within this zone. Mandatory flood insurance purchase requirements apply. AH - Zone AH is the flood insurance rate zone that corresponds to the areas of 1-percent annual chance shallow flooding with a constant water-surface elevation (usually areas of ponding) where average depths are between 1 and 3 feet. The Base Flood Elevations derived from the detailed hydraulic analyses are shown at selected intervals within this zone. Mandatory flood insurance purchase requirements apply. AO - Zone AO is the flood insurance rate zone that corresponds to the areas of 1-percent shallow flooding (usually sheet flow on sloping terrain) where average depths are between 1 and 3 feet. Average flood depths derived from the detailed hydraulic analyses are shown within this zone. In addition, alluvial fan flood hazards are shown as Zone AO on the Flood Insurance Rate Map. Mandatory flood insurance purchase requirements apply. AR - Zone AR is the flood insurance rate zone used to depict areas protected from flood hazards by flood control structures, such as a levee, that are being restored. FEMA will consider using the Zone AR designation for a community if the flood protection system has been deemed restorable by a Federal agency in consultation with a local project sponsor; a minimum level of flood protection is still provided to the community by the system; and restoration of the flood protection system is scheduled to begin within a designated time period and in accordance with a progress plan negotiated between the community and FEMA. Mandatory purchase requirements for flood insurance will apply in Zone AR, but the rate will not exceed the rate for an unnumbered Zone A if the structure is built in compliance with Zone AR floodplain management regulations. A99 - Zone A99 is the flood insurance rate zone that corresponds to areas within the 1-percent annual chance floodplain that will be protected by a Federal flood protection system where construction has reached specified statutory milestones. No Base Flood Elevations or depths are shown within this zone. Mandatory flood insurance purchase requirements apply. D - Zone D designation is used for areas where there are possible but undetermined flood hazards. In areas designated as Zone D, no analysis of flood hazards has been conducted. Mandatory flood insurance purchase requirements do not apply, but coverage is available. The flood insurance rates for properties in Zone D are commensurate with the uncertainty of the flood risk. V - Zone V is the flood insurance rate zone that corresponds to areas within the 1-percent annual chance coastal floodplains that have additional hazards associated with storm waves. Because approximate hydraulic analyses are performed for such areas, no Base Flood Elevations are shown within this zone. Mandatory flood insurance purchase requirements apply. VE - Zone VE is the flood insurance rate zone that corresponds to areas within the 1-percent annual chance coastal floodplain that have additional hazards associated with storm waves. Base Flood Elevations derived from the detailed hydraulic analyses are shown at selected intervals within this zone. Mandatory flood insurance purchase requirements apply. X - Zone X is the flood insurance rate zones that correspond to areas outside the 1-percent annual chance floodplain – Areas protected from the 1-percent annual chance flood by levees. No Base Flood Elevations or depths are shown within this zone. Insurance purchase is not required in these zones. More information about the flood zones can be found here. The NFHL data are derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps, flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data where available. The NFHL data is available at State level. The data is updated on monthly basis and FEMA is in the process of mapping all the flood zones and so some counties do not have complete data. For better visualization, it’s recommended to display the service with 50% transparency. The map service has a county layer that helps differentiate between the counties that have flood data available and those that do not. The flood data is scale dependent and is set to show from 1:3,000,000. This data is as of March 2011.

  6. Indicative Flood Risk Areas - Clusters

    • environment.data.gov.uk
    • data.europa.eu
    Updated Jan 20, 2017
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    Environment Agency (2017). Indicative Flood Risk Areas - Clusters [Dataset]. https://environment.data.gov.uk/dataset/27325bdc-dbfd-4d10-bdb7-b0298703d082
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    Dataset updated
    Jan 20, 2017
    Dataset authored and provided by
    Environment Agencyhttps://www.gov.uk/ea
    License

    Open Government Licence 3.0http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
    License information was derived automatically

    Description

    PLEASE NOTE: this dataset has been retired. It has been superseded by data for Flood Risk Areas: https://environment.data.gov.uk/dataset/f3d63ec5-a21a-49fb-803a-0fa0fb7238b6

    The Indicative Flood Risk Areas are primarily based on an aggregated 1km square grid Updated Flood Map for Surface Water (1 in 100 and 1000 annual probability rainfall), informally referred to as the “blue square map”.

    • Cluster Maps – are aggregations of 3km by 3km squares that each contain at least 4 (in Wales) or 5 (in England) touching "blue squares" (i.e. 1km grid squares where one of the thresholds above is exceeded)

    This dataset forms part of Indicative Flood Risk Areas (shapefiles)

    A bundle download of all Indicative Flood Risk Areas spatial datasets is also available from this record. Please see individual records for full details and metadata on each product.

  7. Community Rating System Special Flood Hazard Areas

    • catalog.data.gov
    • opendata.dc.gov
    • +2more
    Updated Feb 5, 2025
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    Federal Emergency Management Agency (2025). Community Rating System Special Flood Hazard Areas [Dataset]. https://catalog.data.gov/dataset/community-rating-system-special-flood-hazard-areas
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    Dataset updated
    Feb 5, 2025
    Dataset provided by
    Federal Emergency Management Agencyhttp://www.fema.gov/
    Description

    The Community Rating System (CRS) is a voluntary incentive program that recognizes and encourages community floodplain management practices that exceed the minimum requirements of the National Flood Insurance Program (NFIP). Over 1,500 communities participate nationwide. In CRS communities, flood insurance premium rates are discounted to reflect the reduced flood risk resulting from the community’s efforts that address the three goals of the program:Reduce and avoid flood damage to insurable propertyStrengthen and support the insurance aspects of the National Flood Insurance ProgramFoster comprehensive floodplain managementAn area having special flood, mudflow or flood-related erosion hazards and shown on a Flood Hazard Boundary Map (FHBM) or a Flood Insurance Rate Map (FIRM) Zone A, AO, A1-A30, AE, A99, AH, AR, AR/A, AR/AE, AR/AH, AR/AO, AR/A1-A30, V1-V30, VE or V. The SFHA is the area where the National Flood Insurance Program's (NFIP's) floodplain management regulations must be enforced and the area where the mandatory purchase of flood insurance applies. For the purpose of determining Community Rating System (CRS) premium discounts, all AR and A99 zones are treated as non-SFHAs.

  8. Risk of Flooding from Reservoirs - Maximum Flood Extent (Web Mapping...

    • data.europa.eu
    • gimi9.com
    unknown
    Updated Sep 12, 2019
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    Environment Agency (2019). Risk of Flooding from Reservoirs - Maximum Flood Extent (Web Mapping Service) [Dataset]. https://data.europa.eu/data/datasets/risk-of-flooding-from-reservoirs-maximum-flood-extent-web-mapping-service?locale=cs
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    unknownAvailable download formats
    Dataset updated
    Sep 12, 2019
    Dataset authored and provided by
    Environment Agencyhttps://www.gov.uk/ea
    Description

    This dataset is now retired and replaced with the following:

    Reservoir Flood Extents - Fluvial Contribution (National) https://environment.data.gov.uk/dataset/db114020-465a-412b-b289-be393d995a75 Reservoir Flood Extents - Wet Day (National) https://environment.data.gov.uk/dataset/d81646cf-37e5-4e71-bbcf-b7d5b9ca3a1c Reservoir Flood Extents - Dry Day (National) https://environment.data.gov.uk/dataset/c66ee97f-49d2-454e-9a19-d48a47bd22ad

    This is the simplified version of the outline Reservoir Flood Map Outline (Extent) as shown on the gov.uk Flood Risk website. This is one of 3 available "Risk of Flooding from Reservoirs" Web Mapping Services; Maximum Flood Depth, Maximum Flood Extent, Maximum Flood Speed.

    Simplified in this context refers to the fact that unlike the detailed product, individual reservoir flood map extents are not shown separately, and one merged outline shows the maximum flood extent for all reservoir flooding scenarios together.

    This is a data layer showing a combined reservoir flood map for 2,092 Large Raised Reservoirs. The data shows the maximum extent of flood should reservoirs be breached, and although the location of each reservoir can be inferred they are not explicitly shown on the maps. The Reservoir Flood Map Maximum Flood Outline (Extent) in its simplified form is referred to externally as Risk of Flooding from Reservoirs – Maximum Flood Extent.

    The Reservoir Flood Map Outline (Extent) shows the largest area that might be flooded if a reservoir were to fail and release the water it holds. Since this is a prediction of a credible worst case scenario, it’s unlikely that any actual flood would be this large. These data are intended for emergency planning only and are not reliable for large scale flood risk assessments.

    Please note that only flood maps for large reservoirs are displayed. Flood maps are not displayed for smaller reservoirs or for reservoirs commissioned after reservoir mapping began in spring 2009.

    Information Warning: The Maximum extent category is available under the standard OGL terms when supplied as a WMS. This excludes the underlying data. Attribution statement: © Environment Agency copyright and/or database right 2019. All rights reserved.

  9. Risk of Flooding from Surface Water Hazard: 3.3 percent annual chance

    • data.wu.ac.at
    jsp, wms
    Updated Aug 7, 2018
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    Environment Agency (2018). Risk of Flooding from Surface Water Hazard: 3.3 percent annual chance [Dataset]. https://data.wu.ac.at/schema/data_gov_uk/MTk0YzM2OGUtYmY4My00Y2JmLWFlOWUtYWY4NDA5NzI2MWQ3
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    wms, jspAvailable download formats
    Dataset updated
    Aug 7, 2018
    Dataset provided by
    Environment Agencyhttps://www.gov.uk/ea
    Area covered
    ba2e83b0ca095c8dee8c9690eb03671e685829c0
    Description

    This dataset is not suitable for identifying whether an individual property will flood. GIS layer showing the flood hazard rating for flooding from surface water that could result from a flood with a 3.3% chance of happening in any given year. The flood hazard rating is defined as a function of simultaneous depth and velocity and grouped into 4 bands. This dataset is one output of our Risk of Flooding from Surface Water (RoFSW) mapping, previously known as the updated Flood Map for Surface Water (uFMfSW). It is one of a group of datasets previously available as the uFMfSW Complex Package. Further information on using these datasets can be found at the Resource Locator link below. Information Warnings: Risk of Flooding from Surface Water is not to be used at property level. If the Content is displayed in map form to others we recommend it should not be used with basemapping more detailed than 1:10,000 as the data is open to misinterpretation if used as a more detailed scale. Because of the way they have been produced and the fact that they are indicative, the maps are not appropriate to act as the sole evidence for any specific planning or regulatory decision or assessment of risk in relation to flooding at any scale without further supporting studies or evidence. Attribution statement: © Environment Agency copyright and/or database right 2015. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). Soils Data © Cranfield University (NSRI) and for the Controller of HMSO 2013.

  10. Risk of Flooding from Surface Water Suitability

    • data.wu.ac.at
    jsp, wms
    Updated Jul 26, 2018
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    Environment Agency (2018). Risk of Flooding from Surface Water Suitability [Dataset]. https://data.wu.ac.at/odso/data_gov_uk/ZDVjYTAxZWMtZTUzNS00ZDNmLWFkYzAtMDg5YjRmMDM2ODdk
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    jsp, wmsAvailable download formats
    Dataset updated
    Jul 26, 2018
    Dataset provided by
    Environment Agencyhttps://www.gov.uk/ea
    Area covered
    3ecfde0e63e61ef93d0b90a2a9b9f43768708d28
    Description

    This dataset is not suitable for identifying whether an individual property will flood. GIS layer giving a suitability rating which represents the scale at which it is generally appropriate to use this information to assess flood risk. It is based on the confidence in the modelling at that location. Always consult this layer when using any RoFSW output products. This dataset is one output of our Risk of Flooding from Surface Water (RoFSW) mapping, previously known as the updated Flood Map for Surface Water (uFMfSW). It is one of a group of datasets previously available as the uFMfSW Complex Package. Further information on using these datasets can be found at the Resource Locator link below. Information Warnings: Risk of Flooding from Surface Water is not to be used at property level. If the Content is displayed in map form to others we recommend it should not be used with basemapping more detailed than 1:10,000 as the data is open to misinterpretation if used as a more detailed scale. Because of the way they have been produced and the fact that they are indicative, the maps are not appropriate to act as the sole evidence for any specific planning or regulatory decision or assessment of risk in relation to flooding at any scale without further supporting studies or evidence. Attribution statement: © Environment Agency copyright and/or database right 2015. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). Soils Data © Cranfield University (NSRI) and for the Controller of HMSO 2013.

  11. g

    Indicative Flood Risk Areas - Communities at Risk data

    • gimi9.com
    • environment.data.gov.uk
    • +1more
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    Indicative Flood Risk Areas - Communities at Risk data [Dataset]. https://gimi9.com/dataset/uk_indicative-flood-risk-areas-communities-at-risk-data
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    License

    CC0 1.0 Universal Public Domain Dedicationhttps://creativecommons.org/publicdomain/zero/1.0/
    License information was derived automatically

    Description

    PLEASE NOTE: this dataset has been retired. It has been superseded by data for Flood Risk Areas: https://environment.data.gov.uk/dataset/f3d63ec5-a21a-49fb-803a-0fa0fb7238b6 Shapefile for Indicative Flood Risk Areas generated using the Environment Agency's Communities at Risk Approach. This information is provided by the Environment Agency for use by LLFAs in their review during 2017 of Preliminary Flood Risk Assessments and Flood Risk Areas under the Flood Risk Areas. it must be used in conjunction with data for Indicative Flood Risk Areas generated by the Environment Agency using the cluster method as well. The Indicative Flood Risk Areas are primarily based on an aggregated 1km square grid Updated Flood Map for Surface Water (1 in 100 and 1000 annual probability rainfall), informally referred to as the “blue square map”. This dataset is a component of Indicative Flood Risk Areas (shapefiles) A bundle download of all Indicative Flood Risk Areas spatial datasets is also available from this record. Please see individual records for full details and metadata on each product. Attribution statement: © Environment Agency copyright and/or database right 2016. All rights reserved.

  12. v

    Risk of Flooding from Surface Water (Basic)

    • anrgeodata.vermont.gov
    • data.catchmentbasedapproach.org
    • +1more
    Updated Feb 20, 2019
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    The Rivers Trust (2019). Risk of Flooding from Surface Water (Basic) [Dataset]. https://anrgeodata.vermont.gov/maps/befb443e57404e9b8707cddf28c56eca
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    Dataset updated
    Feb 20, 2019
    Dataset authored and provided by
    The Rivers Trust
    Area covered
    Description

    This dataset is not suitable for identifying whether an individual property will flood. This bundle includes the Basic subset of layers from our Risk of Flooding from Surface Water (RoFSW) mapping, previously known as the updated Flood Map for Surface Water (uFMfSW). It is a group of datasets previously available as the uFMfSW Complex Package. The Basic subset includes the following layers: Risk of Flooding from Surface Water Extent: 0.1 percent annual chance Risk of Flooding from Surface Water Extent: 1 percent annual chance Risk of Flooding from Surface Water Extent: 3.3 percent annual chance Risk of Flooding from Surface Water Input Model DetailsRisk of Flooding from Surface Water Suitability

    InformationWarnings: Risk of Flooding from Surface Water is not to be used at property level. If the Content is displayed in map form to others we recommend it should not be used with basemapping more detailed than 1:10,000 as the data is open to misinterpretation if used as a more detailed scale. Because of the way they have been produced and the fact that they are indicative, the maps are not appropriate to act as the sole evidence for any specific planning or regulatory decision or assessment of risk in relation to flooding at any scale without further supporting studies or evidence. Some features of this information are based on digital spatial data licensed from the Centre for Ecology & Hydrology © NERC (CEH). Defra, Met Office and DARD Rivers Agency © Crown copyright. © Cranfield University. © James Hutton Institute. Contains OS data © Crown copyright and database right 2015. Land & Property Services © Crown copyright and database right.This partner version can be downloaded from environment.data.gov.uk.

  13. e

    Risk of Flooding from Surface Water

    • data.europa.eu
    • gimi9.com
    • +1more
    pdf, unknown
    Updated Jan 28, 2025
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    Environment Agency (2025). Risk of Flooding from Surface Water [Dataset]. https://data.europa.eu/data/datasets/risk-of-flooding-from-surface-water3?locale=de
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    unknown, pdfAvailable download formats
    Dataset updated
    Jan 28, 2025
    Dataset authored and provided by
    Environment Agency
    Description

    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

  14. e

    Map based index (GeoIndex) geological indicators of flooding

    • data.europa.eu
    • spatialdata.gov.scot
    • +1more
    unknown
    Updated Sep 27, 2021
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    Scottish Government SpatialData.gov.scot (2021). Map based index (GeoIndex) geological indicators of flooding [Dataset]. https://data.europa.eu/data/datasets/map-based-index-geoindex-geological-indicators-of-flooding1
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    unknownAvailable download formats
    Dataset updated
    Sep 27, 2021
    Dataset authored and provided by
    Scottish Government SpatialData.gov.scot
    Description

    This layer of the map based index (GeoIndex) shows where river floodplains and coastal plains in Britain are located and therefore the main areas at greatest risk of flooding. The map shows areas vulnerable to two main types of flooding: inland (river floodplains) and coastal/estuarine and is therefore a key tool in identifying those areas most vulnerable from future flooding. The map is based on observation of the types of geological deposit present and does not take into account any man-made influences such as house building or flood protection schemes. It also does not take into account low-lying areas where flooding could occur but where there are no materials indicating flooding in the geological past. The BGS Geological Indicators of Flooding data should therefore be regarded as complementary to, but not a replacement for, existing Environment Agency flood risk maps. The BGS Geological Indicators of Flooding (GIF) dataset is a digital map based on the BGS Digital Geological Map of Great Britain at the 1:50,000 scale.

  15. e

    Indicative Flood Risk Areas - Clusters

    • data.europa.eu
    unknown
    Updated Jun 16, 2021
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    Environment Agency (2021). Indicative Flood Risk Areas - Clusters [Dataset]. https://data.europa.eu/data/datasets/indicative-flood-risk-areas-clusters?locale=pt
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    unknownAvailable download formats
    Dataset updated
    Jun 16, 2021
    Dataset authored and provided by
    Environment Agency
    License

    Open Government Licence 3.0http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
    License information was derived automatically

    Description

    The Indicative Flood Risk Areas are primarily based on an aggregated 1km square grid Updated Flood Map for Surface Water (1 in 100 and 1000 annual probability rainfall), informally referred to as the “blue square map”.

    • Cluster Maps – are aggregations of 3km by 3km squares that each contain at least 4 (in Wales) or 5 (in England) touching "blue squares" (i.e. 1km grid squares where one of the thresholds above is exceeded)

    This dataset forms part of Indicative Flood Risk Areas (shapefiles)

    A bundle download of all Indicative Flood Risk Areas spatial datasets is also available from this record. Please see individual records for full details and metadata on each product. Attribution statement: © Environment Agency copyright and/or database right 2016. All rights reserved.

  16. Risk of Flooding from Surface Water Extent: 3.3 percent annual chance

    • data.europa.eu
    • environment.data.gov.uk
    unknown
    Updated Dec 14, 2014
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    Environment Agency (2014). Risk of Flooding from Surface Water Extent: 3.3 percent annual chance [Dataset]. https://data.europa.eu/data/datasets/risk-of-flooding-from-surface-water-extent-3-3-percent-annual-chance?locale=en
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    unknownAvailable download formats
    Dataset updated
    Dec 14, 2014
    Dataset authored and provided by
    Environment Agencyhttps://www.gov.uk/ea
    Description

    PLEASE NOTE: This record has been retired. It has been superseded by: https://environment.data.gov.uk/dataset/b5aaa28d-6eb9-460e-8d6f-43caa71fbe0e

    This dataset is not suitable for identifying whether an individual property will flood. GIS layer showing the extent of flooding from surface water that could result from a flood with a 3.3% chance of happening in any given year. This dataset is one output of our Risk of Flooding from Surface Water (RoFSW) mapping, previously known as the updated Flood Map for Surface Water (uFMfSW). It is one of a group of datasets previously available as the uFMfSW Complex Package. Further information on using these datasets can be found at the Resource Locator link below. Information Warnings: Risk of Flooding from Surface Water is not to be used at property level. If the Content is displayed in map form to others we recommend it should not be used with basemapping more detailed than 1:10,000 as the data is open to misinterpretation if used as a more detailed scale. Because of the way they have been produced and the fact that they are indicative, the maps are not appropriate to act as the sole evidence for any specific planning or regulatory decision or assessment of risk in relation to flooding at any scale without further supporting studies or evidence. Attribution statement: © Environment Agency copyright and/or database right 2015. All rights reserved.

    Some features of this information are based on digital spatial data licensed from the Centre for Ecology & Hydrology © NERC (CEH). Defra, Met Office and DARD Rivers Agency © Crown copyright. © Cranfield University. © James Hutton Institute. Contains OS data © Crown copyright and database right 2015. Land & Property Services © Crown copyright and database right.

  17. Flood Insurance Rate Maps and Base Flood Elevations, FIRM, DFIRM, BFE -...

    • data.wu.ac.at
    xml
    Updated Aug 19, 2017
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    NSGIC State | GIS Inventory (2017). Flood Insurance Rate Maps and Base Flood Elevations, FIRM, DFIRM, BFE - FLOODPLAINS_BFE_DFIRM_IDNR_IN: DFIRM Floodplain Base Flood Elevation Lines for 86 of 92 Counties in Indiana (Indiana Department of Natural Resources, 1:12,000, Line Shapefile) [Dataset]. https://data.wu.ac.at/schema/data_gov/YmFhN2YwNDUtNDUzMy00ZjdkLTg1ZjktOWY5ZjcwYzhjMjY2
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    xmlAvailable download formats
    Dataset updated
    Aug 19, 2017
    Dataset provided by
    National States Geographic Information Council
    Area covered
    c4569850e42810f714dda06d9a28a7164c687da2
    Description

    This line layer represents base flood elevations (BFEs) created from FEMA Flood Rate Insurance Maps (FIRM). BFE lines indicate the rounded whole-foot water surface elevation of the 1% annual chance flood. BFE lines are required in riverine AE zones. AE Zones are areas inundated by 1% annual chance flooding (100-year flood), for which BFEs have been determined. Of 92 counties in Indiana, 86 are included in this DFIRM data set and 62 counties have BFE information. The following 6 counties are omitted  Allen, DeKalb, Johnson, Lake, Marion, Vanderburgh. These counties will be completed as work on the IDNR project progresses. This floodplain data may be used with an associated floodplain polygon shapefile and cross sections line shapefile. IDNR documentation states -  This database is an interim version of the Digital Flood Insurance Rate Map (DFIRM) Database. It does not fully meet all DFIRM specifications as found in  Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Database . A fully compliant product is expected in 2005. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000. The DFIRM Database presents the flood risk information depicted on the FIRM in a digital format suitable for use in electronic mapping applications. The DFIRM database is a subset of the Digital FIS database that serves to archive the information collected during the FIS.Â

  18. g

    WWNP Floodplain Reconnection Potential | gimi9.com

    • gimi9.com
    Updated Dec 14, 2024
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    (2024). WWNP Floodplain Reconnection Potential | gimi9.com [Dataset]. https://gimi9.com/dataset/uk_wwnp-floodplain-reconnection-potential
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    Dataset updated
    Dec 14, 2024
    License

    CC0 1.0 Universal Public Domain Dedicationhttps://creativecommons.org/publicdomain/zero/1.0/
    License information was derived automatically

    Description

    This dataset has been produced as part of the Mapping Potential for Working with Natural Processes research project (SC150005). The project created a toolbox of mapped data and methods which enable operational staff in England to identify potential locations for Working with Natural Processes (WWNP). Data has been produced for each intervention covered by the project. The final outputs include the following datasets: • Floodplain Woodland Planting Potential • Riparian Woodland Planting Potential • Wider Catchment Woodland • Floodplain Reconnection Potential • Runoff Attenuation Features 3.3% AEP • Runoff Attenuation Features 1% AEP • Woodland Constraints WWNP Floodplain Reconnection Potential is our best estimate of locations where it may be possible to establish reconnection between a watercourse and its natural floodplain, especially during high flows. The dataset is designed to support signposting of areas where there is currently poor connectivity such that flood waters are constrained to the channel and flood waves may therefore propagate downstream rapidly. The dataset is based upon the Risk of Flooding from Rivers and Sea probability maps, and identifies areas of low and very low probability that are close to a watercourse, but which do not contain residential property or key services. The areas may contain non-residential property so it is important to consider this and recent buildings or defences when considering floodplain reconnection. Locations identified may have more recent building or land use than available data indicates. It is important to note that land ownership and change to flood risk have not been considered, and it may be necessary to model the impacts of significant reconnection. 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 Attribution statement: © Environment Agency copyright and/or database right 2015. All rights reserved.

  19. Preliminary Flood Risk Assessment Map (Cycle 2) – Solway Tweed River Basin...

    • dsp.agrimetrics.co.uk
    Updated Dec 12, 2018
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    Preliminary Flood Risk Assessment Map (Cycle 2) – Solway Tweed River Basin District [Dataset]. https://dsp.agrimetrics.co.uk/dataset/4948a0bb-0177-4ed1-bc6b-4efee964bac2
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    Dataset updated
    Dec 12, 2018
    Dataset authored and provided by
    Environment Agencyhttps://www.gov.uk/ea
    Description

    This dataset consists of an interactive map (and supporting guidance) containing background information that informs how we understand flood risk across the Solway Tweed River Basin District. The map shows the River Basin District, component river basins and the coastline together with layers showing land use and topography.

    This dataset together with equivalent datasets for each River Basin District, supports the Preliminary Flood Risk Assessment for England report which has been written to meet the requirements of the Flood Risk Regulations (2009) - to complete an assessment of flood risk and produce supporting maps of river catchments.

  20. Indicative Flood Risk Areas - People Sensitivity Grid

    • data.europa.eu
    • cloud.csiss.gmu.edu
    unknown
    Updated May 12, 2021
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    Environment Agency (2021). Indicative Flood Risk Areas - People Sensitivity Grid [Dataset]. https://data.europa.eu/data/datasets/indicative-flood-risk-areas-people-sensitivity-grid5?locale=sv
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    unknownAvailable download formats
    Dataset updated
    May 12, 2021
    Dataset authored and provided by
    Environment Agencyhttps://www.gov.uk/ea
    Description

    The Indicative Flood Risk Areas are primarily based on an aggregated 1km square grid Updated Flood Map for Surface Water (1 in 100 and 1000 annual probability rainfall), informally referred to as the “blue square map”.

    This dataset is a component of Indicative Flood Risk Areas (shapefiles)

    A bundle download of all Indicative Flood Risk Areas spatial datasets is also available from this record. Please see individual records for full details and metadata on each product. Attribution statement: © Environment Agency copyright and/or database right 2016. All rights reserved.

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(2024). Flood Map for Planning (Rivers and Sea) - Flood Zone 2 [Dataset]. https://gimi9.com/dataset/uk_flood-map-for-planning-rivers-and-sea-flood-zone-2

Flood Map for Planning (Rivers and Sea) - Flood Zone 2

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19 scholarly articles cite this dataset (View in Google Scholar)
Dataset updated
Dec 14, 2024
License

CC0 1.0 Universal Public Domain Dedicationhttps://creativecommons.org/publicdomain/zero/1.0/
License information was derived automatically

Description

The Flood Map for Planning (Rivers and Sea) includes several layers of information. This dataset covers Flood Zone 2 and should not be used without Flood Zone 3. It is our best estimate of the areas of land at risk of flooding, when the presence of flood defences are ignored and covers land between Zone 3 and the extent of the flooding from rivers or the sea with a 1 in 1000 (0.1%) chance of flooding each year. This dataset also includes those areas defined in Flood Zone 3. This dataset is designed to support flood risk assessments in line with Planning Practice Guidance ; and raise awareness of the likelihood of flooding to encourage people living and working in areas prone to flooding to find out more and take appropriate action. The information provided is largely based on modelled data and is therefore indicative rather than specific. Locations may also be at risk from other sources of flooding, such as high groundwater levels, overland run off from heavy rain, or failure of infrastructure such as sewers and storm drains. The information indicates the flood risk to areas of land and is not sufficiently detailed to show whether an individual property is at risk of flooding, therefore properties may not always face the same chance of flooding as the areas that surround them. This is because we do not hold details about properties and their floor levels. Information on flood depth, speed or volume of flow is not included. NOTE: We have paused quarterly updates of this dataset. Please visit the “Pause to Updates of Flood Risk Maps” announcement on our support pages for further information. We will provide notifications on the Flood Map for Planning website to indicate where we have new flood risk information. Other data related to the Flood Map for Planning will continue to be updated, including data relating to flood history, flood defences, and water storage areas. Attribution statement: © Environment Agency copyright and/or database right 2023. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2023 OS AC0000807064.

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