100+ datasets found
  1. G

    Global Flood Database v1 (2000-2018)

    • developers.google.com
    + more versions
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    Cloud to Street (C2S) / Dartmouth Flood Observatory (DFO), Global Flood Database v1 (2000-2018) [Dataset]. https://developers.google.com/earth-engine/datasets/catalog/GLOBAL_FLOOD_DB_MODIS_EVENTS_V1
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    Dataset provided by
    Cloud to Street (C2S) / Dartmouth Flood Observatory (DFO)
    Time period covered
    Feb 17, 2000 - Dec 10, 2018
    Area covered
    Earth
    Description

    The Global Flood Database contains maps of the extent and temporal distribution of 913 flood events occurring between 2000-2018. For more information, see the associated journal article. Flood events were collected from the Dartmouth Flood Observatory and used to collect MODIS imagery. The selected 913 events are those that were successfully mapped (passed quality control as having significant inundation beyond permanent water) using 12,719 scenes from Terra and Aqua MODIS sensors. Each pixel was classified as water or non-water at 250-meter resolution during the full date range of each flood event and subsequent data products were generated including maximum flood extent ("flooded" band) and the duration of inundation in days ("duration" band). Water and non-water classifications during a flood event include permanent water (here resampling the 30-meter JRC Global Surface Water dataset representing permanent water to 250-meter resolution), which can be masked out to isolate flood water using the "jrc_perm_water" band. Extra data quality bands were added representing cloud conditions during the flood event (e.g., "clear_views" representing the number of clear days the flood was observed between its start and end dates and "clear_perc" representing the percentage of clear day observation of the total event duration in days). Each image in the ImageCollection represents the map of an individual flood. The collection can be filtered by date, country, or Dartmouth Flood Observatory original ID.

  2. Risk of Flooding from Surface Water

    • environment.data.gov.uk
    • data.europa.eu
    Updated Sep 17, 2025
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    Environment Agency (2025). Risk of Flooding from Surface Water [Dataset]. https://environment.data.gov.uk/dataset/b5aaa28d-6eb9-460e-8d6f-43caa71fbe0e
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    Dataset updated
    Sep 17, 2025
    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

    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 is produced using national scale modelling and enhanced with compatible, locally produced modelling from lead local flood authorities (LLFAs). The RoFSW datasets include information about flooding extents, depths, speed and hazards.

    This dataset shows information about flooding extents and depths. The depth of water during a flood is an important factor in how dangerous a flood might be.

    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% (1 in 30) chance in any given year; 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) but greater than or equal to 0.1% (1 in 1000) chance in any given year.

    This dataset shows the likelihood of a flood occurring with water at a given depth (or higher). There are separate layers with thresholds for depths of 0m (i.e. flooding extent), 0.2m, 0.3m, 0.6m, 0.9m, and 1.2m.

    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

  3. r

    Data from: Flood Hazard Areas

    • rigis.org
    • arc-gis-hub-home-arcgishub.hub.arcgis.com
    • +1more
    Updated Jun 24, 2022
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    Environmental Data Center (2022). Flood Hazard Areas [Dataset]. https://www.rigis.org/datasets/flood-hazard-areas
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    Dataset updated
    Jun 24, 2022
    Dataset authored and provided by
    Environmental Data Center
    Area covered
    Description

    This hosted feature layer has been published in RI State Plane Feet NAD 83.Statewide flood hazard areas compiled from county-based Digital Flood Insurance Rate Map (DFIRM) databases for Rhode Island. The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. 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. TheDFIRM 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), and in this case redistributed by the Rhode Island Geographic Information System (RIGIS) at the request of the Rhode Island Emergency Management Agency.This dataset provides the user with information on the flood risk hazard zones throughout the state of Rhode Island. Note: the above summary is a slightly modified version adapted from source metadata records provided by FEMA. To provide the user with information on the statewide flood risk based on information provided by the Federal Emergency Management Agency (FEMA) in the DFIRM databases created specifically for the five counties of Rhode Island (Bristol, Kent, Newport, Providence, and Washington). This dataset provides information on the likelihood that a flood may occur at a given location in the state. The files and information used to create this dataset were originally provided to the Rhode Island Emergency Management Agency (RIEMA) by FEMA.This information was in the form of DFIRM databases for each of the five RI counties. This information was then redistributed by RIGIS at the request of RIEMA. The information provided by this data is only a subset of the information available in the original DFIRM databases located on the RIGIS website. For a specific county's complete DFIRM database, please visit the RIGIS website and download the appropriate DFIRM database. This metadata record is specific to this dataset and only contains information relevant to this dataset as provided by FEMA the original DFIRM metadata records. These can be found and referenced in the /DOCUMENT folder that is downloaded as part of a DFIRM package for a specific Rhode Island county. Another valuable source of documentation is FEMA's "Guidelines and Specifications for Flood Hazard Mapping Partners". It is currently available online at https://www.fema.gov/guidelines-and-standards-flood-risk-analysis-and-mapping. The Guide offers a tremendous amount of information regarding how DFIRM data are created, and detailed information about the individual files that constitute a DFIRM database.

  4. Historic Flood Map

    • environment.data.gov.uk
    Updated Nov 17, 2025
    + more versions
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    Environment Agency (2025). Historic Flood Map [Dataset]. https://environment.data.gov.uk/dataset/889885c0-d465-11e4-9507-f0def148f590
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    Dataset updated
    Nov 17, 2025
    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

    The Historic Flood Map is a GIS layer showing the maximum extent of individual Recorded Flood Outlines from river, the sea and groundwater springs that meet a set criteria. It shows areas of land that have previously been subject to flooding in England. This excludes flooding from surface water, except in areas where it is impossible to determine whether the source is fluvial or surface water but the dominant source is fluvial.

    The majority of records began in 1946 when predecessor bodies to the Environment Agency started collecting detailed information about flooding incidents, although we hold limited details about flooding incidents prior to this date.

    If an area is not covered by the Historic Flood Map it does not mean that the area has never flooded, only that we do not currently have records of flooding in this area that meet the criteria for inclusion. It is also possible that the pattern of flooding in this area has changed and that this area would now flood or not flood under different circumstances. Outlines that don’t meet this criteria are stored in the Recorded Flood Outlines dataset.

    The Historic Flood Map takes into account the presence of defences, structures, and other infrastructure where they existed at the time of flooding. It will include flood extents that may have been affected by overtopping, breaches or blockages.

    Flooding is shown to the land and does not necessarily indicate that properties were flooded internally.

  5. d

    Data from: Flood Control Structures

    • catalog.data.gov
    • datasets.ai
    • +2more
    Updated Dec 2, 2020
    + more versions
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    Federal Emergency Management Agency (Point of Contact) (2020). Flood Control Structures [Dataset]. https://catalog.data.gov/dataset/flood-control-structures
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    Dataset updated
    Dec 2, 2020
    Dataset provided by
    Federal Emergency Management Agency (Point of Contact)
    Description

    The National Flood Hazard Layer (NFHL) data incorporates all Digital Flood Insurance Rate Map(DFIRM) databases published by FEMA, and any Letters Of Map Revision (LOMRs) that have been issued against those databases since their publication date. The DFIRM Database is the digital, geospatial version of the flood hazard information shown on the published paper Flood Insurance Rate Maps(FIRMs). 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 NFHL data are 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 are consistent with those required for mapping at a scale of 1:12,000. The NFHL data contain layers in the Standard DFIRM datasets except for S_Label_Pt and S_Label_Ld. The NFHL is available as State or US Territory data sets. Each State or Territory data set consists of all DFIRMs and corresponding LOMRs available on the publication date of the data set.

  6. G

    Flood Risk Areas and Historical Floods

    • ouvert.canada.ca
    • catalogue.arctic-sdi.org
    csv, fgdb/gdb +7
    Updated Feb 26, 2025
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    Government of New Brunswick (2025). Flood Risk Areas and Historical Floods [Dataset]. https://ouvert.canada.ca/data/dataset/d3a95098-7eb3-85f4-9a2a-9c173830d562
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    csv, xml, html, rss, fgdb/gdb, kmz, shp, kml, geojsonAvailable download formats
    Dataset updated
    Feb 26, 2025
    Dataset provided by
    Government of New Brunswick
    License

    Open Government Licence - Canada 2.0https://open.canada.ca/en/open-government-licence-canada
    License information was derived automatically

    Description

    Flood risk areas display the extent of known historical flood events as well as areas that have a probability of flooding as determined from historical records. The polygon data includes the description of the flood event, the typical causes of the flood and any associated place name keys. The line data indicates the limits of the flood risk mapping information and the 2008 and 2018 flood data. Flood extents for the 2008 and 2018 Lower Saint John River floods are included.

  7. Flood Map for Planning - Flood Zones

    • environment.data.gov.uk
    • data.europa.eu
    Updated Jan 29, 2025
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    Environment Agency (2025). Flood Map for Planning - Flood Zones [Dataset]. https://environment.data.gov.uk/dataset/04532375-a198-476e-985e-0579a0a11b47
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    Dataset updated
    Jan 29, 2025
    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

    The Flood Map for Planning Service includes several layers of information. This includes the Flood Zones data which shows the extent of land at present day risk of flooding from rivers and the sea, ignoring the benefits of defences, for the following scenarios:

    • Flood Zone 1 – Land having a less than 0.1% (1 in 1000) annual probability of flooding. • Flood Zone 2 – Land having between 0.1% - 1% (1 in 100 to 1 in 1000) annual probability of flooding from rivers or between 0.1% - 0.5% (1 in 200 to 1 in 1000) annual probability of flooding from the sea, and accepted recorded flood outlines . • Flood Zone 3 – Areas shown to be at a 1% (1 in 100) or greater annual probability of flooding from rivers or 0.5% (1 in 200) or greater annual probability of flooding from the sea.

    Flood Zone 1 is not shown in this dataset, but covers all areas not contained within Flood Zones 2 and 3. Local Planning Authorities (LPAs) use the Flood Zones to determine if they must consult the Environment Agency on planning applications. They are also used to determine if development is incompatible and whether development is subject to the exception test. The Flood Zones are one of several flood risk datasets used to determine the need for planning applications to be supported by a Flood Risk Assessment (FRA) and subject to the sequential test.

    The Flood Zones are a composite dataset including national and local modelled data, and information from past floods.

    The Flood Zones are designed to only give an indication of flood risk to an area of land and are not suitable for showing whether an individual property is at risk of flooding. This is because we cannot know all the details about each property.

    Users of these datasets should always check they are suitable for the intended use

  8. H

    Data from: Global Flood Database

    • hydroshare.org
    zip
    Updated Mar 16, 2021
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    Beth Tellman (2021). Global Flood Database [Dataset]. http://doi.org/10.4211/hs.6461528501c14f7c9d6b10d20dd4f657
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    zip(14.8 MB)Available download formats
    Dataset updated
    Mar 16, 2021
    Dataset provided by
    HydroShare
    Authors
    Beth Tellman
    License

    Attribution-NonCommercial-NoDerivs 4.0 (CC BY-NC-ND 4.0)https://creativecommons.org/licenses/by-nc-nd/4.0/
    License information was derived automatically

    Time period covered
    Jul 1, 2001 - Dec 31, 2018
    Area covered
    global,
    Description

    Global Flood Database Scripts & Data

    This repository includes code and supporting data for the Global Flood Database. This include descriptions of the data and code, and how they relate to Tellman et al, Satellite observations indicate increasing proportion of population exposed to floods

  9. d

    National Flood Hazard Layer - Montgomery County 2017

    • search.dataone.org
    • hydroshare.org
    Updated Dec 5, 2021
    + more versions
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    Federal Emergency Management Agency (2021). National Flood Hazard Layer - Montgomery County 2017 [Dataset]. https://search.dataone.org/view/sha256%3A50e14d3194465904377f4fcffa56f85bdc6e6c2b97b8e5f8ebf149dea34b842e
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    Dataset updated
    Dec 5, 2021
    Dataset provided by
    Hydroshare
    Authors
    Federal Emergency Management Agency
    Area covered
    Description

    The National Flood Hazard Layer (NFHL) data incorporates all Flood Insurance Rate Map (FIRM) databases published by the Federal Emergency Management Agency (FEMA), and any Letters Of Map Revision (LOMRs) that have been issued against those databases since their publication date. It is updated on a monthly basis. The FIRM Database is the digital, geospatial version of the flood hazard information shown on the published paper FIRMs. The FIRM Database depicts flood risk information and supporting data used to develop the risk data. 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 FIRM Database is derived from Flood Insurance Studies (FISs), previously published 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 FEMA. The NFHL is available as State or US Territory data sets. Each State or Territory data set consists of all FIRM Databases and corresponding LOMRs available on the publication date of the data set. The specification for the horizontal control of FIRM Databases is consistent with those required for mapping at a scale of 1:12,000. This file is georeferenced to the Earth's surface using the Geographic Coordinate System (GCS) and North American Dataum of 1983 (NSRS-2007).

    This data is hosted at, and may be downloaded or accessed from PASDA, the Pennsylvania Spatial Data Access Geospatial Data Clearinghouse http://www.pasda.psu.edu/uci/DataSummary.aspx?dataset=2292

  10. d

    National Flood Hazard Layer - Bucks County 2017

    • search.dataone.org
    • hydroshare.org
    • +1more
    Updated Dec 5, 2021
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    Federal Emergency Management Agency (2021). National Flood Hazard Layer - Bucks County 2017 [Dataset]. https://search.dataone.org/view/sha256%3A7641172b8ca3d480407068d8f634fd1e9dc6eadcada927f4ed385e423c83ddc7
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    Dataset updated
    Dec 5, 2021
    Dataset provided by
    Hydroshare
    Authors
    Federal Emergency Management Agency
    Area covered
    Description

    The National Flood Hazard Layer (NFHL) data incorporates all Flood Insurance Rate Map (FIRM) databases published by the Federal Emergency Management Agency (FEMA), and any Letters Of Map Revision (LOMRs) that have been issued against those databases since their publication date. It is updated on a monthly basis. The FIRM Database is the digital, geospatial version of the flood hazard information shown on the published paper FIRMs. The FIRM Database depicts flood risk information and supporting data used to develop the risk data. 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 FIRM Database is derived from Flood Insurance Studies (FISs), previously published 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 FEMA. The NFHL is available as State or US Territory data sets. Each State or Territory data set consists of all FIRM Databases and corresponding LOMRs available on the publication date of the data set. The specification for the horizontal control of FIRM Databases is consistent with those required for mapping at a scale of 1:12,000. This file is georeferenced to the Earth's surface using the Geographic Coordinate System (GCS) and North American Dataum of 1983 (NSRS-2007).

    This data is hosted at, and may be downloaded or accessed from PASDA, the Pennsylvania Spatial Data Access Geospatial Data Clearinghouse http://www.pasda.psu.edu/uci/DataSummary.aspx?dataset=2274

  11. a

    FEMA Flood Hazard Data

    • open-government-cityofmobile.hub.arcgis.com
    Updated Mar 6, 2024
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    City of Mobile, Alabama (2024). FEMA Flood Hazard Data [Dataset]. https://open-government-cityofmobile.hub.arcgis.com/maps/502b5bab53604928bdb8106fbd98edb2
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    Dataset updated
    Mar 6, 2024
    Dataset authored and provided by
    City of Mobile, Alabama
    Area covered
    Description

    From the Flood Risk Non-Regulatory Database that went into effect June 5, 2020. For more information, visit FEMA.gov Flood Maps.Flood Hazard Zones: The FIRM is the basis for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). Insurance applications include enforcement of the mandatory purchase requirement of the Flood Disaster Protection Act, which "... requires the purchase of flood insurance by property owners who are being assisted by Federal programs or by Federally supervised, regulated or insured agencies or institutions in the acquisition or improvement of land facilities located or to be located in identified areas having special flood hazards," Section 2 (b) (4) of the Flood Disaster Protection Act of 1973. In addition to the identification of Special Flood Hazard Areas (SFHAs), the risk zones shown on the FIRMs are the basis for the establishment of premium rates for flood coverage offered through the NFIP. 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.The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. 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 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 file is georeferenced to earth's surface using the UTM projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.Flood Hazard Boundary Line: Boundary line dividing Special Flood Hazard Area Zones and boundary dividing Special Flood Hazard Areas of different Base Flood Elevations, flood Depths or flood velocities.Flood Hazard BFE: Location and attributes for base flood elevations lines shown on DFIRM. This line layer was converted to a polygon by COM GIS department.Flood Hazard Cross Section: Location and attributes for cross-section lines in the area covered by the DFIRM.Flood Hazard Map Index: Location and attributes for DFIRM hardcopy map panels.Use limitationsThe hardcopy FIRM and DFIRM and the accompanying FISs are the official designation of SFHAs and Base Flood Elevations (BFEs) for the NFIP. For the purposes of the NFIP, changes to the flood risk information published by FEMA may only be performed by FEMA and through the mechanisms established in the NFIP regulations (44 CFR Parts 59-78). These digital data are produced in conjunction with the hardcopy FIRMs and generally match the hardcopy map exactly. However the hardcopy flood maps and flood profiles are the authoritative documents for the NFIP. Acknowledgement of FEMA would be appreciated in products derived from these data.

  12. A

    36inch Sea Level Rise 1pct Annual Flood

    • data.boston.gov
    • cloudcity.ogopendata.com
    Updated Jul 8, 2020
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    Boston Maps (2020). 36inch Sea Level Rise 1pct Annual Flood [Dataset]. https://data.boston.gov/dataset/36inch-sea-level-rise-1pct-annual-flood
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    kml, html, arcgis geoservices rest api, zip, geojson, csvAvailable download formats
    Dataset updated
    Jul 8, 2020
    Dataset provided by
    BostonMaps
    Authors
    Boston Maps
    License

    ODC Public Domain Dedication and Licence (PDDL) v1.0http://www.opendatacommons.org/licenses/pddl/1.0/
    License information was derived automatically

    Description
    Area of potential coastal and riverine flooding in Boston under various sea level rise scenarios (9-inch in 2030s, 21-inch in 2050s, and 36-inch in 2070s) at high tide and in the event of storms with an annual exceedance probability (AEP) of 10 and 1 percent.

    Learn more about the projections from Climate Ready Boston’s Projections Consensus and data methodology in Climate Ready Boston’s Vulnerability Assessment.

    Source:

    Coastal flood hazard data created as part of Climate Ready Boston are a reanalysis of the coastal flood hazard data developed as part of the MassDOT-FHWA analysis. In 2015, MassDOT released an analysis of coastal flood hazards using state-of-the-art numerical models capable of simulating thousands of potential nor’easters and tropical storms coincident with a range of tide levels, riverine flow rates in the Charles and Mystic Rivers, and sea level rise conditions.

    Definitions:

    9-inch Sea Level Rise: By the end of the 2050s, 9 inches of sea level rise is expected consistently across emissions scenarios and is likely to occur as early as the 2030s. 9” Climate scenario and coastal/riverine hazard flooding data are the MassDOT-FHWA high sea level rise scenario for 2030. Actual sea level rise value is 0.62 feet above 2013 tide levels, with an additional 0.74 inches to account for subsidence.

    21-inch Sea Level Rise: In the second half of the century, 21 inches is expected across all emissions scenarios. 21” Data were interpolated from the MassDOT-FHWA 2030 and 2070/2100 data.

    36-inch Sea Level Rise: The highest sea level rise considered, 36 inches, is highly probable toward the end of the century. This scenario has a greater than 50 percent chance of occurring within this time period for the moderate emissions reduction and business-as-usual scenarios and a nearly 50 percent chance for the major emissions reduction scenario. 36” Climate scenario and coastal/riverine hazard fooding data are the MassDOT-FHWA high sea level rise scenario for 2070/intermediate sea level rise scenario for 2100. Actual sea level rise value is 3.2 feet above 2013 tide levels, with an additional 2.5 inches to account for subsidence.

    High Tide: Average monthly high tide is approximately two feet higher than the commonly used mean higher high water (MHHW, the average of the higher high water levels of each tidal day), and lower than king tides (the twice-a year high tides that occur when the gravitational pulls of the sun and the moon are aligned).

    10% Annual Flood: A “10 percent annual chance flood” is a flood event that has a 1 in 10 chance of occurring in any given year. Another name for this flood, which is the primary coastal flood hazard delineated in FEMA FIRMs, is the “10-year flood.”

    1% Annual Flood: A “1 percent annual chance flood” is a flood event that has a 1 in 100 chance of occurring in any given year. Another name for this flood, which is the primary coastal flood hazard delineated in FEMA FIRMs, is the “100-year flood.”
  13. d

    National Flood Hazard Layer - Berks County 2017

    • search.dataone.org
    • hydroshare.org
    • +1more
    Updated Dec 5, 2021
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    Federal Emergency Management Agency (2021). National Flood Hazard Layer - Berks County 2017 [Dataset]. https://search.dataone.org/view/sha256%3A92d7dccae931e5dbf8ec04b21f33a872defc8846593cab1fdf93e12d587c3ba6
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    Dataset updated
    Dec 5, 2021
    Dataset provided by
    Hydroshare
    Authors
    Federal Emergency Management Agency
    Area covered
    Description

    The National Flood Hazard Layer (NFHL) data incorporates all Flood Insurance Rate Map (FIRM) databases published by the Federal Emergency Management Agency (FEMA), and any Letters Of Map Revision (LOMRs) that have been issued against those databases since their publication date. It is updated on a monthly basis. The FIRM Database is the digital, geospatial version of the flood hazard information shown on the published paper FIRMs. The FIRM Database depicts flood risk information and supporting data used to develop the risk data. 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 FIRM Database is derived from Flood Insurance Studies (FISs), previously published 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 FEMA. The NFHL is available as State or US Territory data sets. Each State or Territory data set consists of all FIRM Databases and corresponding LOMRs available on the publication date of the data set. The specification for the horizontal control of FIRM Databases is consistent with those required for mapping at a scale of 1:12,000. This file is georeferenced to the Earth's surface using the Geographic Coordinate System (GCS) and North American Dataum of 1983 (NSRS-2007).

    This data is hosted at, and may be downloaded or accessed from PASDA, the Pennsylvania Spatial Data Access Geospatial Data Clearinghouse http://www.pasda.psu.edu/uci/DataSummary.aspx?dataset=2283

  14. c

    Risk of Flooding from Surface Water (Basic)

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

    PLEASE NOTE: This record has been retired. It has been superseded by: https://environment.data.gov.uk/dataset/b5aaa28d-6eb9-460e-8d6f-43caa71fbe0eThis 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.

  15. V

    Virginia Flooding Events and NFIP Insurance Claims

    • data.virginia.gov
    Updated Dec 13, 2021
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    Hampton Roads PDC & Hampton Roads TPO (2021). Virginia Flooding Events and NFIP Insurance Claims [Dataset]. https://data.virginia.gov/dataset/virginia-flooding-events-and-nfip-insurance-claims
    Explore at:
    html, arcgis geoservices rest apiAvailable download formats
    Dataset updated
    Dec 13, 2021
    Dataset provided by
    HRPDC & HRTPO
    Authors
    Hampton Roads PDC & Hampton Roads TPO
    Area covered
    Virginia
    Description

    Overview of Data Sources

    Flooding Event Data: The flooding event summaries were developed using the NOAA Storm Events Database, available for download at NOAA National Centers for Environmental Information website. While there are many weather events provided in the NOAA Storm Events Database, only the following values were selected for inclusion in the locality summaries: coastal flood, flash flood, flood, heavy rain, hurricane (typhoon), and tropical storm. Detailed descriptions of event types are provided in Appendix A of NOAA's National Weather Service documentation. The data included in this summary includes events recorded from January 1996 through August 2021.

    FEMA National Flood Insurance Program Claims: The NFIP claims data were obtained through the FIMA NFIP Redacted Claims data, available through the OpenFEMA data portal. The data used in this analysis was last updated December 6, 2021.

    While every effort has been made to obtain current information about the flood events and flood insurance claims contained herein, no representation or assurance is made regarding the accuracy of the underlying data. Please contact HRDPC staff with questions regarding this dashboard product.

  16. d

    National Flood Hazard Layer - Delaware County 2017

    • dataone.org
    • hydroshare.org
    • +1more
    Updated Dec 5, 2021
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    Federal Emergency Management Agency (2021). National Flood Hazard Layer - Delaware County 2017 [Dataset]. https://dataone.org/datasets/sha256%3Af4006d27e23a85e85a071242829783f4d8c8cdc008c853488d646750955a7d90
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    Dataset updated
    Dec 5, 2021
    Dataset provided by
    Hydroshare
    Authors
    Federal Emergency Management Agency
    Area covered
    Description

    The National Flood Hazard Layer (NFHL) data incorporates all Flood Insurance Rate Map (FIRM) databases published by the Federal Emergency Management Agency (FEMA), and any Letters Of Map Revision (LOMRs) that have been issued against those databases since their publication date. It is updated on a monthly basis. The FIRM Database is the digital, geospatial version of the flood hazard information shown on the published paper FIRMs. The FIRM Database depicts flood risk information and supporting data used to develop the risk data. 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 FIRM Database is derived from Flood Insurance Studies (FISs), previously published 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 FEMA. The NFHL is available as State or US Territory data sets. Each State or Territory data set consists of all FIRM Databases and corresponding LOMRs available on the publication date of the data set. The specification for the horizontal control of FIRM Databases is consistent with those required for mapping at a scale of 1:12,000. This file is georeferenced to the Earth's surface using the Geographic Coordinate System (GCS) and North American Dataum of 1983 (NSRS-2007).

    This data is hosted at, and may be downloaded or accessed from PASDA, the Pennsylvania Spatial Data Access Geospatial Data Clearinghouse http://www.pasda.psu.edu/uci/DataSummary.aspx?dataset=2309

  17. Data from: A Global Database of Historic and Real-time Flood Events based on...

    • zenodo.org
    • data.niaid.nih.gov
    csv
    Updated Jan 24, 2020
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    Jens de Bruijn; Jens de Bruijn (2020). A Global Database of Historic and Real-time Flood Events based on Social Media [Dataset]. http://doi.org/10.5281/zenodo.3525033
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    csvAvailable download formats
    Dataset updated
    Jan 24, 2020
    Dataset provided by
    Zenodohttp://zenodo.org/
    Authors
    Jens de Bruijn; Jens de Bruijn
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Description

    Early event detection and response can significantly reduce the societal impact of floods. Currently, early warning systems rely on gauges, radar data, models and informal local sources. However, the scope and reliability of these systems are limited. Recently, the use of social media for detecting disasters has shown promising results, especially for earthquakes. Here, we present a new database for detecting floods in real-time on a global scale using Twitter. The method was developed using 88 million tweets, from which we derived over 10.000 flood events (i.e., flooding occurring in a country or first order administrative subdivision) across 176 countries in 11 languages in just over four years. Using strict parameters, validation shows that approximately 90% of the events were correctly detected. In countries where the first official language is included, our algorithm detected 63% of events in NatCatSERVICE disaster database at admin 1 level. Moreover, a large number of flood events not included in NatCatSERVICE are detected. All results are publicly available on www.globalfloodmonitor.org.

  18. n

    FEMA Flood Hazard Zones

    • opdgig.dos.ny.gov
    Updated Nov 9, 2022
    + more versions
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    New York State Department of State (2022). FEMA Flood Hazard Zones [Dataset]. https://opdgig.dos.ny.gov/datasets/fema-flood-hazard-zones/about
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    Dataset updated
    Nov 9, 2022
    Dataset authored and provided by
    New York State Department of Statehttp://www.dos.ny.gov/
    Area covered
    Description

    This dataset displays the locations of flood hazard zones identified by FEMA. The Federal Emergency Management Agency (FEMA) produces Flood Insurance Rate maps and identifies Special Flood Hazard Areas as part of the National Flood Insurance Program's floodplain management. Special Flood Hazard Areas have regulations that include the mandatory purchase of flood insurance. This layer is derived from the October 13, 2021 version of the National Flood Hazard Layer feature class S_Fld_Haz_Ar. The data were aggregated into eight classes to produce the Esri Symbology field based on symbology provided by FEMA. All other layer attributes are derived from the National Flood Hazard Layer.The layer was projected to Web Mercator Auxiliary Sphere, then the repair geometry geoprocessing tool was run on it. Its resolution was set to 0.0001 meter. To improve performance Flood Zone values "Area Not Included", "Open Water", "D", "NP", and No Data were removed from the layer. Areas with Flood Zone value "X" subtype "Area of Minimal Flood Hazard" were also removed. An imagery layer created from this dataset provides access to the full set of records in the National Flood Hazard Layer.View Dataset on the Gateway

  19. P

    Data from: An improved database of coastal flooding in the United Kingdom...

    • bodc.ac.uk
    delimited, documents
    Updated Feb 10, 2017
    + more versions
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    Haigh, Ivan.; Ozsoy, Ozgun.; Wadey, Matthew.; Nicholls, Robert.; Gallop, Shari.; Wahl, Thomas.; Brown, Jennifer. (2017). An improved database of coastal flooding in the United Kingdom from 1915 to 2016. [Dataset]. http://doi.org/10.5285/481720c2-35bd-6c10-e053-6c86abc06bb3
    Explore at:
    delimited, documentsAvailable download formats
    Dataset updated
    Feb 10, 2017
    Dataset provided by
    National Oceanography Centre, Liverpool
    University of Southampton School of Ocean and Earth Science
    University of Southampton Engineering and the Environment
    Authors
    Haigh, Ivan.; Ozsoy, Ozgun.; Wadey, Matthew.; Nicholls, Robert.; Gallop, Shari.; Wahl, Thomas.; Brown, Jennifer.
    Time period covered
    Jan 1, 1915 - Dec 31, 2016
    Area covered
    Variables measured
    Sea level, Air pressure
    Description

    Coastal flooding caused by extreme sea levels can produce devastating and wide-ranging consequences. The ‘SurgeWatch’ v1.0 database systematically documents and assesses the consequences of historical coastal flood events around the UK. The original database was inevitably biased due to the inconsistent spatial and temporal coverage of sea-level observations utilised. Therefore, we present an improved version integrating a variety of ‘soft’ data such as journal papers, newspapers, weather reports, and social media. SurgeWatch2.0 identifies 329 coastal flooding events from 1915 to 2016, a more than fivefold increase compared to the 59 events in v1.0. Moreover, each flood event is now ranked using a multi-level categorisation based on inundation, transport disruption, costs, and fatalities: from 1 (Nuisance) to 6 (Disaster). For the 53 most severe events ranked Category 3 and above, an accompanying event description based upon the Source-Pathway-Receptor-Consequence framework was produced. The database contains 58 files: 1 XLSX file, 55 PDF files and 2 CSV file. The first file is a spreadsheet (XLSX) containing the list of all 329 coastal flood events in the database categorised according to the severity scale that we devised. The second and third files are PDF documents containing the short commentaries for all Category 1 and 2 events. There are an additional 53 PDF files containing the longer event commentaries for events ranked Category 3 and higher. A final two CSV files contains the water levels and digitised storm tracks for the 53 Category 3 and higher events. Each of these files is self-describing and is accompanied by extensive metadata. SurgeWatch v2.0 provides the most comprehensive and coherent historical record of UK coastal flooding. It is designed to be a resource for research, planning and management and education. Haigh et al. (2017) provides more detail. Collation of the database and the development of the website was funded through a Natural Environment Research Council (NERC) impact acceleration grant. The database contributes to the objectives of UK Engineering and Physical Sciences Research Council (EPSRC) consortium project FLOOD Memory (EP/K013513/1).

  20. Data from: Flood Prediction Dataset

    • kaggle.com
    zip
    Updated Jun 26, 2024
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    Naiya Khalid (2024). Flood Prediction Dataset [Dataset]. https://www.kaggle.com/datasets/naiyakhalid/flood-prediction-dataset
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    zip(696132 bytes)Available download formats
    Dataset updated
    Jun 26, 2024
    Authors
    Naiya Khalid
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Description

    OVERVIEW:

    Flood detection refers to identifying, monitoring, and alerting authorities or individuals about the presence or likelihood of flooding in a particular area. It involves using various technologies and methods to detect, predict, and mitigate the impacts of floods. Flood prediction is a critical area of research due to its significant impact on human life, infrastructure, and the environment. Accurate flood prediction models can aid in disaster preparedness and risk management, reducing the adverse effects of floods.

    • The dataset used in this study, sourced from flood.csv, contains multiple features relevant to flood prediction, including environmental factors and socio-economic indicators. The Dataset has 50000 rows and 21 columns.
    • The dataset includes 21 numeric variables such as 'MonsoonIntensity,' 'TopographyDrainage,' 'RiverManagement,' 'Deforestation,' 'Urbanization,' 'ClimateChange,' 'DamsQuality,' 'Siltation,' 'AgriculturalPractices,' 'Encroachments,' 'IneffectiveDisasterPreparedness,' 'DrainageSystems,' 'CoastalVulnerability,' 'Landslides,' 'Watersheds,' 'DeterioratingInfrastructure,' 'PopulationScore,' 'WetlandLoss,' 'InadequatePlanning,' 'PoliticalFactors,' and 'FloodProbability.'
    • There are no missing values in these numeric columns. The dataset includes no categorical variables. All columns are int64 type. This makes the dataset generally suitable for regression models without extensive preprocessing.

    IMPORTANT FEATURES OF DATASET:

    The dataset used for this analysis comprises numerous features, providing essential insights into environmental and human factors that influence flood occurrence and severity. These features include:

    1. MonsoonIntensity: Higher volumes of rain during monsoons increase the probability of floods.
    2. TopographyDrainage: The drainage capacity based on the region's topography. Efficient drainage can help drain rainwater and reduce the risk of floods.
    3. RiverManagement: The quality and effectiveness of river management practices. Proper river management, including dredging and bank maintenance, can improve water flow and reduce floods.
    4. Deforestation: The extent of deforestation in the area.* Deforestation reduces the soil's ability to absorb water, increasing surface runoff and the risk of floods.
    5. Urbanization: The level of urbanization in the region. Urban areas have impermeable surfaces (asphalt, concrete), which reduce water infiltration, raising the risk of floods.
    6. ClimateChange: The impact of climate change on the region. Climate change can lead to more extreme precipitation patterns, including torrential rains that can cause floods.
    7. DamsQuality: The quality and maintenance status of dams. Well-maintained dams can control floods, and dams with structural problems can break and cause catastrophic floods.
    8. **Siltation: ** The extent of siltation in rivers and reservoirs. The accumulation of sediments in rivers (siltation) reduces drainage capacity and increases the risk of floods.
    9. Agricultural Practices: The types and sustainability of agricultural practices. The intensification of agriculture can lead to deforestation, excessive use of fertilizers and pesticides, and inappropriate irrigation practices, reducing soil biodiversity and increasing the risk of floods.
    10. Encroachments: The degree of encroachment on flood plains and natural waterways. Construction in flood-prone areas impedes the natural flow of water and increases the risk of floods.
    11. **IneffectiveDisasterPreparedness: ** The lack of emergency plans, warning systems, and simulations increases the negative impact of floods.
    12. DrainageSystems: Well-maintained and adequately sized drainage systems help drain rainwater and reduce the risk of floods.
    13. CoastalVulnerability: Low-lying coastal areas are prone to flooding from storm surges and sea level rise.
    14. Landslides: Steep slopes and unstable soils are more prone to landslides.
    15. Watersheds: Regions with more watersheds may have a higher or lower risk of flooding, depending on various factors.
    16. DeterioratingInfrastructure: Clogged culverts, damaged drainage channels, and other deficient infrastructure can increase the risk of floods.
    17. PopulationScore: Densely populated areas can suffer more severe losses.
    18. WetlandLoss: Wetlands act as natural sponges, absorbing excess water and helping to prevent floods.
    19. InadequatePlanning: Urban planning that does not consider the risk of flooding increases the vulnerability of communities.
    20. PoliticalFactors: Factors such as corruption and a lack of political will to invest in drainage infrastructure can make it difficult to manage flood risk.
    21. FloodProbability: The overall probability of flooding in the region. This is the target variable for predictive analysis. This is the target Variable.
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Cloud to Street (C2S) / Dartmouth Flood Observatory (DFO), Global Flood Database v1 (2000-2018) [Dataset]. https://developers.google.com/earth-engine/datasets/catalog/GLOBAL_FLOOD_DB_MODIS_EVENTS_V1

Global Flood Database v1 (2000-2018)

Related Article
Explore at:
9 scholarly articles cite this dataset (View in Google Scholar)
Dataset provided by
Cloud to Street (C2S) / Dartmouth Flood Observatory (DFO)
Time period covered
Feb 17, 2000 - Dec 10, 2018
Area covered
Earth
Description

The Global Flood Database contains maps of the extent and temporal distribution of 913 flood events occurring between 2000-2018. For more information, see the associated journal article. Flood events were collected from the Dartmouth Flood Observatory and used to collect MODIS imagery. The selected 913 events are those that were successfully mapped (passed quality control as having significant inundation beyond permanent water) using 12,719 scenes from Terra and Aqua MODIS sensors. Each pixel was classified as water or non-water at 250-meter resolution during the full date range of each flood event and subsequent data products were generated including maximum flood extent ("flooded" band) and the duration of inundation in days ("duration" band). Water and non-water classifications during a flood event include permanent water (here resampling the 30-meter JRC Global Surface Water dataset representing permanent water to 250-meter resolution), which can be masked out to isolate flood water using the "jrc_perm_water" band. Extra data quality bands were added representing cloud conditions during the flood event (e.g., "clear_views" representing the number of clear days the flood was observed between its start and end dates and "clear_perc" representing the percentage of clear day observation of the total event duration in days). Each image in the ImageCollection represents the map of an individual flood. The collection can be filtered by date, country, or Dartmouth Flood Observatory original ID.

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