83 datasets found
  1. U.S. Coastal Inundation from Sea Level Rise

    • hub.arcgis.com
    • oceans-esrioceans.hub.arcgis.com
    • +2more
    Updated Nov 10, 2022
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    Esri (2022). U.S. Coastal Inundation from Sea Level Rise [Dataset]. https://hub.arcgis.com/maps/cab265835317461e818f13eabc242ed1
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    Dataset updated
    Nov 10, 2022
    Dataset authored and provided by
    Esrihttp://esri.com/
    License

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

    Area covered
    Description

    The sea level rise (SLR) coastal inundation layers were created using existing federal products: the (1) NOAA Coastal Digital Elevation Models (DEMs) and (2) 2022 Interagency Sea Level Rise Technical Report Data Files. The DEMs for the Continental United States (CONUS) are provided in North American Vertical Datum 1988 (NAVD 88) and were converted to Mean Higher High Water (MHHW) using the NOAA VDatum conversion surfaces; the elevation values are in meters (m). The NOAA Scenarios of Future Mean Sea Level are provided in centimeters (cm). The MHHW DEMs for CONUS were merged and converted to cm and Scenarios of Future Mean Sea Level were subtracted from the merged DEM. Values below 0 represent areas that are below sea level and are “remapped” to 1, all values above 0 are remapped to “No Data”, creating a map that shows only areas impacted by SLR. Areas protected by levees in Louisiana and Texas were then masked or removed from the results.Scenario: For each of the 5 GMSL scenarios (identified by the rise amounts in meters by 2100--0.3 m , 0.5 m. 1.0 m, 1.5 m and 2.0 m), there is a low, medium (med) and high value, corresponding to the 17th, 50th, and 83rd percentiles. Scenarios (15 total): 0.3 - MED, 0.3 - LOW, 0.3 - HIGH, 0.5 - MED, 0.5 - LOW, 0.5 - HIGH, 1.0 - MED, 1.0 - LOW, 1.0 - HIGH, 1.5 - MED, 1.5 - LOW, 1.5 - HIGH, 2.0 - MED, 2.0 - LOW, and 2.0 - HIGH Years (15 total): 2005, 2020, 2030, 2040, 2050, 2060, 2070, 2080, 2090, 2100, 2110, 2120, 2130, 2140, and 2150Report Website: https://oceanservice.noaa.gov/hazards/sealevelrise/sealevelrise-tech-report.htmlGeneral DisclaimerThe data and maps in this tool illustrate the scale of potential flooding, not the exact location, and do not account for erosion, subsidence, or future construction. Water levels are relative to Mean Higher High Water (MHHW) (excludes wind driven tides). The data, maps, and information provided should be used only as a screening-level tool for management decisions. As with all remotely sensed data, all features should be verified with a site visit. Hydroconnectivity was not considered in the mapping process. The data and maps in this tool are provided “as is,” without warranty to their performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of these data is assumed by the user. This tool should be used strictly as a planning reference tool and not for navigation, permitting, or other legal purposes.SLR data are not available for Hawaii, Alaska, or U.S. territories at this time.Levees DisclaimerEnclosed levee areas are displayed as gray areas on the maps.Major federal leveed areas were assumed high enough and strong enough to protect against inundation depicted in this viewer, and therefore no inundation was mapped in these regions. Major federal leveed areas were taken from the National Levee Database.Minor (nonfederal) leveed areas were mapped using the best available elevation data that capture leveed features. In some cases, however, breaks in elevation occur along leveed areas because of flood control features being removed from elevation data, limitations of the horizontal and vertical resolution of the elevation data, the occurrence of levee drainage features, and so forth. Flooding behind levees is only depicted if breaks in elevation data occur or if the levee elevations are overtopped by the water surface. At some flood levels, alternate pathways around—not through—levees, walls, dams, and flood gates may exist that allow water to flow into areas protected at lower levels. In general, imperfect levee and elevation data make assessing protection difficult, and small data errors can have large consequences.Citations2022 Sea Level Rise Technical Report - Sweet, W.V., B.D. Hamlington, R.E. Kopp, C.P. Weaver, P.L. Barnard, D. Bekaert, W. Brooks, M. Craghan, G. Dusek, T. Frederikse, G. Garner, A.S. Genz, J.P. Krasting, E. Larour, D. Marcy, J.J. Marra, J. Obeysekera, M. Osler, M. Pendleton, D. Roman, L. Schmied, W. Veatch, K.D. White, and C. Zuzak, 2022: Global and Regional Sea Level Rise Scenarios for the United States: Updated Mean Projections and Extreme Water Level Probabilities Along U.S. Coastlines. NOAA Technical Report NOS 01. National Oceanic and Atmospheric Administration, National Ocean Service, Silver Spring, MD, 111 pp. https://oceanservice.noaa.gov/hazards/sealevelrise/noaa-nostechrpt01-global-regional-SLR-scenarios-US.pdf

  2. U

    United States US: Land Area Where Elevation is Below 5 Meters: % of Total...

    • ceicdata.com
    Updated Nov 27, 2021
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    CEICdata.com (2021). United States US: Land Area Where Elevation is Below 5 Meters: % of Total Land Area [Dataset]. https://www.ceicdata.com/en/united-states/land-use-protected-areas-and-national-wealth/us-land-area-where-elevation-is-below-5-meters--of-total-land-area
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    Dataset updated
    Nov 27, 2021
    Dataset provided by
    CEICdata.com
    License

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

    Time period covered
    Dec 1, 1990 - Dec 1, 2010
    Area covered
    United States
    Description

    United States US: Land Area Where Elevation is Below 5 Meters: % of Total Land Area data was reported at 1.168 % in 2010. This stayed constant from the previous number of 1.168 % for 2000. United States US: Land Area Where Elevation is Below 5 Meters: % of Total Land Area data is updated yearly, averaging 1.168 % from Dec 1990 (Median) to 2010, with 3 observations. The data reached an all-time high of 1.168 % in 2010 and a record low of 1.168 % in 2010. United States US: Land Area Where Elevation is Below 5 Meters: % of Total Land Area data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s USA – Table US.World Bank: Land Use, Protected Areas and National Wealth. Land area below 5m is the percentage of total land where the elevation is 5 meters or less.; ; Center for International Earth Science Information Network (CIESIN)/Columbia University. 2013. Urban-Rural Population and Land Area Estimates Version 2. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). http://sedac.ciesin.columbia.edu/data/set/lecz-urban-rural-population-land-area-estimates-v2.; Weighted Average;

  3. u

    Adjusted Elevation Probabilities for the 2080s

    • marine.usgs.gov
    Updated May 31, 2017
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    (2017). Adjusted Elevation Probabilities for the 2080s [Dataset]. https://marine.usgs.gov/coastalchangehazardsportal/ui/info/item/EXf3LkWP
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    Dataset updated
    May 31, 2017
    Area covered
    Description

    The U.S. Geological Survey has been forecasting sea-level rise impacts on the landscape to evaluate where coastal land will be available for future use. The purpose of this project is to develop a spatially explicit, probabilistic model of coastal response for the Northeastern U.S. to a variety of sea-level scenarios that take into account the variable nature of the coast and provides outputs at spatial and temporal scales suitable for decision support. Model results provide predictions of adjusted land elevation ranges (AE) with respect to forecast sea-levels, a likelihood estimate of this outcome (PAE), and a probability of coastal response (CR) characterized as either static or dynamic. The predictions span the coastal zone vertically from -12 meters (m) to 10 m above mean high water (MHW). Results are produced at a horizontal resolution of 30 meters for four decades (the 2020s, 2030s, 2050s and 2080s). Adjusted elevations and their respective probabilities are generated using regional geospatial datasets of current sea-level forecasts, vertical land movement rates, and current elevation data. Coastal response type predictions incorporate adjusted elevation predictions with land cover data and expert knowledge to determine the likelihood that an area will be able to accommodate or adapt to water level increases and maintain its initial land class state or transition to a new non-submerged state (dynamic) or become submerged (static). Intended users of these data include scientific researchers, coastal planners, and natural resource management communities.

    These GIS layers provide the probability of observing the forecast of adjusted land elevation (PAE) with respect to predicted sea-level rise or the Northeastern U.S. for the 2020s, 2030s, 2050s and 2080s. These data are based on the following inputs: sea-level rise, vertical land movement rates due to glacial isostatic adjustment and elevation data. The output displays the highest probability among the five adjusted elevation ranges (-12 to -1, -1 to 0, 0 to 1, 1 to 5, and 5 to 10 m) to be observed for the forecast year as defined by a probabilistic framework (a Bayesian network), and should be used concurrently with the adjusted land elevation layer (AE), also available from http://woodshole.er.usgs.gov/project-pages/coastal_response/, which provides users with the forecast elevation range occurring when compared with the four other elevation ranges. These data layers primarily show the distribution of adjusted elevation range probabilities over a large spatial scale and should therefore be used qualitatively.

  4. S

    Probabilistic state-level estimates of US coastal storm property damages...

    • data.subak.org
    • data.niaid.nih.gov
    • +1more
    csv
    Updated Feb 16, 2023
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    Rutgers University (2023). Probabilistic state-level estimates of US coastal storm property damages from climate change [Dataset]. https://data.subak.org/dataset/probabilistic-state-level-estimates-of-us-coastal-storm-property-damages-from-climate-change
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    csvAvailable download formats
    Dataset updated
    Feb 16, 2023
    Dataset provided by
    Rutgers University
    License

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

    Description

    Probabilistic estimates of property damage (2010 USD) by damage mechanism, sea level measure, region, and time period. Values are derived from Estimates of US coastal damages by local sea level (doi: https://doi.org/10.5281/zenodo.820149) using the code at https://github.com/ClimateImpactLab/acp-impacts

    Direct (surge + wind) and business-interruption storm damage estimates as well as estimated property below sea level are projected by estimating damages as a function of local sea level (LSL). These damage functions are then applied to probabilistic estimates of local sea level from Kopp et al (2014) using a Monte Carlo simulation. Percentiles of the resulting distributions are presented in the included files. Estimates of property below sea level are calculated for both mean sea level (MSL) as well as mean higher high water (MHHW).

    In each period, estimates of the cumulative value of inundated property, or property below sea level, are removed from the exposure data set when computing future storm damages; therefore, projections of future storm damages differ between the two measures of sea level.

  5. n

    Sea Level Rise - 4.5ft Inundation

    • opdgig.dos.ny.gov
    Updated Mar 20, 2025
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    New York State Department of State (2025). Sea Level Rise - 4.5ft Inundation [Dataset]. https://opdgig.dos.ny.gov/maps/1bee5431137d48399c845d3b9730e316
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    Dataset updated
    Mar 20, 2025
    Dataset authored and provided by
    New York State Department of State
    Area covered
    Pacific Ocean, South Pacific Ocean
    Description

    This dataset was created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer depicting potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The purpose of this dataset is to show potential sea level rise inundation of 4_5 ft above current Mean Higher High Water (MHHW) for the area. Tiles have been cached down to Level ID 15 (1:18,055). This dataset illustrates the scale of potential flooding, not the exact location, and does not account for erosion, subsidence, or future construction. Inundation is shown as it would appear during the highest high tides (excludes wind driven tides) with the sea level rise amount. The dataset should be used only as a screening-level tool for management decisions. As with all remotely sensed data, all features should be verified with a site visit. The dataset is provided "as is," without warranty to its performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of this dataset is assumed by the user. This dataset should be used strictly as a planning reference and not for navigation, permitting, or other legal purposes. For more information visit the Sea Level Rise Impacts Viewer (https://coast.noaa.gov/slr).View Dataset on the Gateway

  6. n

    Sea Level Rise - 3.5ft Inundation

    • opdgig.dos.ny.gov
    Updated Mar 20, 2025
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    New York State Department of State (2025). Sea Level Rise - 3.5ft Inundation [Dataset]. https://opdgig.dos.ny.gov/datasets/033e8a24c14b4f96ae1a530cd172c6df_1
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    Dataset updated
    Mar 20, 2025
    Dataset authored and provided by
    New York State Department of State
    Area covered
    Pacific Ocean, South Pacific Ocean
    Description

    This dataset displays potential future sea levels. The purpose of this dataset is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. The data and maps in this tool illustrate the scale of potential flooding, not the exact location, and do not account for erosion, subsidence, or future construction. Water levels are shown as they would appear during the highest high tides (excludes wind driven tides). The data, maps, and information provided should be used only as a screening-level tool for management decisions. This dataset was created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer depicting potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The purpose of this dataset is to show potential sea level rise inundation of 3.5ft above current Mean Higher High Water (MHHW) for the area. Tiles have been cached down to Level ID 15 (1:18,055). This dataset illustrates the scale of potential flooding, not the exact location, and does not account for erosion, subsidence, or future construction. Inundation is shown as it would appear during the highest high tides (excludes wind driven tides) with the sea level rise amount. The dataset should be used only as a screening-level tool for management decisions. As with all remotely sensed data, all features should be verified with a site visit. The dataset is provided "as is," without warranty to its performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of this dataset is assumed by the user. This dataset should be used strictly as a planning reference and not for navigation, permitting, or other legal purposes. For more information visit the Sea Level Rise Impacts Viewer (https://coast.noaa.gov/slr).View Dataset on the Gateway

  7. d

    Wetland migration analysis for relative sea-level rise scenarios in Nassau...

    • catalog.data.gov
    • data.usgs.gov
    Updated Jul 20, 2024
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    U.S. Geological Survey (2024). Wetland migration analysis for relative sea-level rise scenarios in Nassau and Duval Counties, Florida [Dataset]. https://catalog.data.gov/dataset/wetland-migration-analysis-for-relative-sea-level-rise-scenarios-in-nassau-and-duval-count
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    Dataset updated
    Jul 20, 2024
    Dataset provided by
    United States Geological Surveyhttp://www.usgs.gov/
    Area covered
    Duval County, Florida
    Description

    This dataset includes probabilistic outputs for estimating areal coverage of current wetland coverage and potential wetland migration under various relative sea-level rise scenarios in Nassau and Duval Counties, which includes the City of Jacksonville and the U.S. National Park Service's Timucuan Ecological and Historic Preserve. These data contain potential migration for regularly oceanic-flooded wetlands (that is, flooded by oceanic water daily) and irregularly oceanic-flooded wetlands (that is, flooded by oceanic water less frequently than daily). The products in this data release were created using an approach that involved digital elevation model error reduction in wetlands (that is, overestimation of elevation in wetlands) and the use of uncertainty assumptions regarding contemporary water levels (that is, tides and extreme water levels), and future sea levels to produce probabilistic estimates of wetland migration into upslope/adjacent areas. Specifically, this data release includes results from analyses of two local sea-level rise scenarios for two-time steps — Intermediate-Low and Intermediate-High for 2050 and 2100 from Sweet and others (2022). The data release includes continuous probability layers and layers with probability binned into three classes, and the probability bins with overlapping land cover classes. Summary References: Sweet, W.V., B.D. Hamlington, R.E. Kopp, C.P. Weaver, P.L. Barnard, D. Bekaert, W. Brooks, M. Craghan, G. Dusek, T. Frederikse, G. Garner, A.S. Genz, J.P. Krasting, E. Larour, D. Marcy, J.J. Marra, J. Obeysekera, M. Osler, M. Pendleton, D. Roman, L. Schmied, W. Veatch, K.D. White, and C. Zuzak, 2022: Global and Regional Sea Level Rise Scenarios for the United States: Updated Mean Projections and Extreme Water Level Probabilities Along U.S. Coastlines. NOAA Technical Report NOS 01. National Oceanic and Atmospheric Administration, National Ocean Service, Silver Spring, MD, 111 pp. https://oceanservice.noaa.gov/hazards/sealevelrise/noaa-nostechrpt01-global-regional-SLR-scenarios-US.pdf

  8. a

    Sea Level Rise - 6ft Inundation

    • new-york-opd-geographic-information-gateway-nysdos.hub.arcgis.com
    • opdgig.dos.ny.gov
    Updated Feb 7, 2023
    + more versions
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    New York State Department of State (2023). Sea Level Rise - 6ft Inundation [Dataset]. https://new-york-opd-geographic-information-gateway-nysdos.hub.arcgis.com/maps/cee7ec1156414e3dbd37a436912d3ed8
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    Dataset updated
    Feb 7, 2023
    Dataset authored and provided by
    New York State Department of State
    Area covered
    Pacific Ocean, South Pacific Ocean
    Description

    This dataset was created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer depicting potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The purpose of this dataset is to show potential sea level rise inundation of 6 ft above current Mean Higher High Water (MHHW) for the area. Tiles have been cached down to Level ID 15 (1:18,055). This dataset illustrates the scale of potential flooding, not the exact location, and does not account for erosion, subsidence, or future construction. Inundation is shown as it would appear during the highest high tides (excludes wind driven tides) with the sea level rise amount. The dataset should be used only as a screening-level tool for management decisions. As with all remotely sensed data, all features should be verified with a site visit. The dataset is provided "as is," without warranty to its performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of this dataset is assumed by the user. This dataset should be used strictly as a planning reference and not for navigation, permitting, or other legal purposes. For more information visit the Sea Level Rise Impacts Viewer (http://coast.noaa.gov/slr).View Dataset on the Gateway

  9. d

    30 meter Esri binary grids of predicted elevation with respect to projected...

    • search.dataone.org
    • datasets.ai
    • +2more
    Updated May 25, 2017
    + more versions
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    U.S. Geological Survey (2017). 30 meter Esri binary grids of predicted elevation with respect to projected sea levels for the Northeastern U.S. from Maine to Virginia for the 2020s, 2030s, 2050s and 2080s (Albers, NAD 83) [Dataset]. https://search.dataone.org/view/dacab371-d80a-4d6c-a6c5-c493d28dec48
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    Dataset updated
    May 25, 2017
    Dataset provided by
    United States Geological Surveyhttp://www.usgs.gov/
    Authors
    U.S. Geological Survey
    Area covered
    Description

    The U.S. Geological Survey has been forecasting sea-level rise impacts on the landscape to evaluate where coastal land will be available for future use. The purpose of this project is to develop a spatially explicit, probabilistic model of coastal response for the Northeastern U.S. to a variety of sea-level scenarios that take into account the variable nature of the coast and provides outputs at spatial and temporal scales suitable for decision support. Model results provide predictions of adjusted land elevation ranges (AE) with respect to forecast sea-levels, a likelihood estimate of this outcome (PAE), and a probability of coastal response (CR) characterized as either static or dynamic. The predictions span the coastal zone vertically from -12 meters (m) to 10 m above mean high water (MHW). Results are produced at a horizontal resolution of 30 meters for four decades (the 2020s, 2030s, 2050s and 2080s). Adjusted elevations and their respective probabilities are generated using regional geospatial datasets of current sea-level forecasts, vertical land movement rates, and current elevation data. Coastal response type predictions incorporate adjusted elevation predictions with land cover data and expert knowledge to determine the likelihood that an area will be able to accommodate or adapt to water level increases and maintain its initial land class state or transition to a new non-submerged state (dynamic) or become submerged (static). Intended users of these data include scientific researchers, coastal planners, and natural resource management communities.

  10. d

    Elevation projections for Pohnpei mangrove forests under a range of...

    • catalog.data.gov
    • s.cnmilf.com
    Updated Jul 6, 2024
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    U.S. Geological Survey (2024). Elevation projections for Pohnpei mangrove forests under a range of sea-level rise scenarios, 2020-2100 [Dataset]. https://catalog.data.gov/dataset/elevation-projections-for-pohnpei-mangrove-forests-under-a-range-of-sea-level-rise-sc-2020
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    Dataset updated
    Jul 6, 2024
    Dataset provided by
    United States Geological Surveyhttp://www.usgs.gov/
    Description

    Model projections of mangrove soil elevation under a range of sea-level rise scenarios (37, 52, 67, and 117 cm by 2100). Soil elevation changed in response to mineral and organic matter inputs and relative changes in sea-level. The model was calibrated using dated soil cores, extensive elevation and vegetation survey data, and water level observations around Pohnpei. Mean elevation for each region was calculated from 100 Monte Carlo simulations and were output annually from 2020-2100. Further details on model development, calibration, and validation are provided in the full report.

  11. n

    Sea Level Rise - 3ft Inundation

    • opdgig.dos.ny.gov
    • new-york-opd-geographic-information-gateway-nysdos.hub.arcgis.com
    Updated Feb 7, 2023
    + more versions
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    New York State Department of State (2023). Sea Level Rise - 3ft Inundation [Dataset]. https://opdgig.dos.ny.gov/maps/365fa1f7f5314c0c81af516028f9c928
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    Dataset updated
    Feb 7, 2023
    Dataset authored and provided by
    New York State Department of State
    Area covered
    Pacific Ocean, South Pacific Ocean
    Description

    This dataset displays potential future sea levels. The purpose of this dataset is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. The data and maps in this tool illustrate the scale of potential flooding, not the exact location, and do not account for erosion, subsidence, or future construction. Water levels are shown as they would appear during the highest high tides (excludes wind driven tides). The data, maps, and information provided should be used only as a screening-level tool for management decisions. This dataset was created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer depicting potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The purpose of this dataset is to show potential sea level rise inundation of 3 ft above current Mean Higher High Water (MHHW) for the area. Tiles have been cached down to Level ID 15 (1:18,055). This dataset illustrates the scale of potential flooding, not the exact location, and does not account for erosion, subsidence, or future construction. Inundation is shown as it would appear during the highest high tides (excludes wind driven tides) with the sea level rise amount. The dataset should be used only as a screening-level tool for management decisions. As with all remotely sensed data, all features should be verified with a site visit. The dataset is provided "as is," without warranty to its performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of this dataset is assumed by the user. This dataset should be used strictly as a planning reference and not for navigation, permitting, or other legal purposes. For more information visit the Sea Level Rise Impacts Viewer (http://coast.noaa.gov/slr).View Dataset on the Gateway

  12. n

    Sea Level Rise - 8ft Inundation

    • opdgig.dos.ny.gov
    Updated Mar 21, 2025
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    New York State Department of State (2025). Sea Level Rise - 8ft Inundation [Dataset]. https://opdgig.dos.ny.gov/items/c7a8eb051c53437599f58a4f3622837b
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    Dataset updated
    Mar 21, 2025
    Dataset authored and provided by
    New York State Department of State
    Area covered
    Pacific Ocean, South Pacific Ocean
    Description

    This dataset displays potential future sea levels. The purpose of this dataset is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. The data and maps in this tool illustrate the scale of potential flooding, not the exact location, and do not account for erosion, subsidence, or future construction. Water levels are shown as they would appear during the highest high tides (excludes wind driven tides). The data, maps, and information provided should be used only as a screening-level tool for management decisions. This dataset was created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer depicting potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The purpose of this dataset is to show potential sea level rise inundation of 8ft above current Mean Higher High Water (MHHW) for the area. Tiles have been cached down to Level ID 15 (1:18,055). This dataset illustrates the scale of potential flooding, not the exact location, and does not account for erosion, subsidence, or future construction. Inundation is shown as it would appear during the highest high tides (excludes wind driven tides) with the sea level rise amount. The dataset should be used only as a screening-level tool for management decisions. As with all remotely sensed data, all features should be verified with a site visit. The dataset is provided "as is," without warranty to its performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of this dataset is assumed by the user. This dataset should be used strictly as a planning reference and not for navigation, permitting, or other legal purposes. For more information visit the Sea Level Rise Impacts Viewer (https://coast.noaa.gov/slr).View Dataset on the Gateway

  13. n

    Sea Level Rise - 6.5ft Inundation

    • opdgig.dos.ny.gov
    Updated Mar 20, 2025
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    New York State Department of State (2025). Sea Level Rise - 6.5ft Inundation [Dataset]. https://opdgig.dos.ny.gov/datasets/sea-level-rise-6-5ft-inundation/about
    Explore at:
    Dataset updated
    Mar 20, 2025
    Dataset authored and provided by
    New York State Department of State
    Area covered
    Pacific Ocean, South Pacific Ocean
    Description

    This dataset was created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer depicting potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The purpose of this dataset is to show potential sea level rise inundation of 6.5ft above current Mean Higher High Water (MHHW) for the area. Tiles have been cached down to Level ID 15 (1:18,055). This dataset illustrates the scale of potential flooding, not the exact location, and does not account for erosion, subsidence, or future construction. Inundation is shown as it would appear during the highest high tides (excludes wind driven tides) with the sea level rise amount. The dataset should be used only as a screening-level tool for management decisions. As with all remotely sensed data, all features should be verified with a site visit. The dataset is provided "as is," without warranty to its performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of this dataset is assumed by the user. This dataset should be used strictly as a planning reference and not for navigation, permitting, or other legal purposes. For more information visit the Sea Level Rise Impacts Viewer (https://coast.noaa.gov/slr).View Dataset on the Gateway

  14. NOAA Office for Coastal Management Sea Level Rise Data: Minor High Tide...

    • datasets.ai
    • s.cnmilf.com
    • +2more
    0, 33
    Updated Aug 8, 2024
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    National Oceanic and Atmospheric Administration, Department of Commerce (2024). NOAA Office for Coastal Management Sea Level Rise Data: Minor High Tide Flooding Inundation Extent [Dataset]. https://datasets.ai/datasets/noaa-office-for-coastal-management-sea-level-rise-data-minor-high-tide-flooding-inundation-exte
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    0, 33Available download formats
    Dataset updated
    Aug 8, 2024
    Dataset provided by
    National Oceanic and Atmospheric Administrationhttp://www.noaa.gov/
    Authors
    National Oceanic and Atmospheric Administration, Department of Commerce
    Description

    These data were created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer depicting potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise (slr) and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The Sea Level Rise and Coastal Flooding Impacts Viewer may be accessed at: https://www.coast.noaa.gov/slr

    These data depict the potential inundation extent of coastal areas resulting from minor high tide flooding, as defined by the NOAA Technical Report NOS CO-OPS 086: Patterns and Projections of High Tide Flooding Along the U.S. Coastline Using a Common Impact Threshold. (https://www.tidesandcurrents.noaa.gov/publications/techrpt86_PaP_of_HTFlooding.pdf)

    The process used to produce the data uses two source datasets to derive the final inundation rasters: the Digital Elevation Model (DEM) of the area and a water surface that represents minor high tide flooding. The minor high tide flooding water surface is based on the equation defined in the technical report referenced above and tidal datum surfaces derived from NOAA's VDatum model.

    The methods used to produce these data does not account for erosion, subsidence, or any future changes in an area's hydrodynamics. It is simply a method to derive data in order to visualize the potential scale and extent, not exact location, of inundation from NWS issued Coastal Flood Advisories.

  15. W

    2016 SoE Coasts Sea level trends from satellite altimeters and tide gauges...

    • cloud.csiss.gmu.edu
    • data.gov.au
    • +2more
    esri rest +1
    Updated Dec 14, 2019
    + more versions
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    Australia (2019). 2016 SoE Coasts Sea level trends from satellite altimeters and tide gauges January 1993 to December 2010 [Dataset]. https://cloud.csiss.gmu.edu/uddi/dataset/2016-soe-coa-sea-level-trends
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    esri rest, esri shape and layer filesAvailable download formats
    Dataset updated
    Dec 14, 2019
    Dataset provided by
    Australia
    License

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

    Description

    Sea level trends from satellite altimeters (colour contours) and tide gauges (coloured dots), January 1993 to December 2010 Source CSIRO and White NJ, Haigh ID, Church JA, Koen T, Watson CS, Pritchard TR, Watson PJ, Burgette RJ, McInnes KL, You Z-J, Zhang X & Tregoning P (2014). Australian sea levels—trends, regional variability and influencing factors. Earth-Science Reviews136:155–174.

    Map prepared by the Department of Environment and Energy in order to produce Figure COA6 in the Coasts theme of the 2016 State of the Environment Report, available at http://www.soe.environment.gov.au

    The map service can be viewed at https://soe.terria.io/#share=s-eVGaBBnig07cXAjsrjEBqbzx9u

    Downloadable spatial data also available below.

  16. A

    21inch Sea Level Rise High Tide

    • data.boston.gov
    • bostonopendata-boston.opendata.arcgis.com
    Updated Feb 19, 2023
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    Boston Maps (2023). 21inch Sea Level Rise High Tide [Dataset]. https://data.boston.gov/dataset/21inch-sea-level-rise-high-tide
    Explore at:
    csv, zip, arcgis geoservices rest api, html, kml, geojsonAvailable download formats
    Dataset updated
    Feb 19, 2023
    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.”
  17. A

    9inch Sea Level Rise High Tide

    • data.boston.gov
    • hub.arcgis.com
    Updated Feb 19, 2023
    + more versions
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    9inch Sea Level Rise High Tide [Dataset]. https://data.boston.gov/dataset/9inch-sea-level-rise-high-tide
    Explore at:
    html, zip, kml, geojson, arcgis geoservices rest api, csvAvailable download formats
    Dataset updated
    Feb 19, 2023
    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.”
  18. s

    Federated States Of Micronesia Sea Level Information #2

    • pacific-data.sprep.org
    Updated Jun 24, 2022
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    Array (2022). Federated States Of Micronesia Sea Level Information #2 [Dataset]. https://pacific-data.sprep.org/dataset/federated-states-micronesia-sea-level-information-2-1
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    application/pdf;charset=utf-8Available download formats
    Dataset updated
    Jun 24, 2022
    Dataset provided by
    Pacific Data Hub
    Authors
    Array
    License

    Public Domain Mark 1.0https://creativecommons.org/publicdomain/mark/1.0/
    License information was derived automatically

    Area covered
    Micronesia, Array
    Description

    In December 2001, a SEAFRAME (Sea Level Fine Resolution Acoustic Measuring Equipment) gauge was installed in Dekehtik, Pohnpei, FSM. Readings(height observations) recorded from the gauge, is held in this record and provided in the form of Yearly Reports, Tide Prediction Calendars and Hourly Sea Level and meteorological data (update frequency- real time) from the Pohnpei station. This is downloadable from the Distribution Info Section of this metadata record and dataset available in digital text format. The gauge has been returning high resolution, good scientific quality data since installation.SEAFRAME gauges not only measure sea level by two independent means, but also a number of "ancillary" variables - air and water temperatures, wind speed, wind direction and atmospheric pressure. This is part of the AusAID-sponsored South Pacific Sea Level and Climate Monitoring Project ("Pacific Project") for the FORUM region, in response to concerns raised by its member countries over the potential impacts of an enhanced Greenhouse Effect on climate and sea levels in the South Pacific region. Project Implementation partners include Australian Bureau of Meteorology , National Tide Center, National Climate Center, Geoscience Australia and SPC ,SOPAC Division.To monitor changes in sea level and climate in the Pacific. The SPSLCMP project information is a unique detailed record of Tide predictions and Meteorological information from the different member Pacific Island countries. These information can be used for diverse purposes by boats, fishermen, government agencies, surveyors, planners, consulting scientists, environmental engineers and other individuals. These purposes include navigation purposes in shallow and narrow ports and intra-coastal waterways, improving fish catches , planning coastal rehabilitation, construction projects, recreation purposes such as catching big waves for surfers and a variety of other applications.STATION LOCATION: Federated States of Micronesia, Pohnpei ,Dekehtik , LATITUDE- 06° 58' 42" N, LONGITUDE - 158° 11' 50" E, Height of Seaframe Sensor Bench Mark above Tide Gauge Zero - 4.0257, District- Dekehtik, Island- Pohnpei,Tide gauges measures relative sea level change, i.e., the change in sea level relative to the tide gauge, which is connected to the land. SEAFRAME location: Federated States Of Micronesia; Minimum recorded air temperature (degrees C): 23.0; Maximum recorded air temperature (degrees C): 31.8.

  19. a

    1ft SLR Low-lying Areas

    • new-york-opd-geographic-information-gateway-nysdos.hub.arcgis.com
    Updated Feb 7, 2023
    + more versions
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    New York State Department of State (2023). 1ft SLR Low-lying Areas [Dataset]. https://new-york-opd-geographic-information-gateway-nysdos.hub.arcgis.com/datasets/NYSDOS::1ft-slr-low-lying-areas
    Explore at:
    Dataset updated
    Feb 7, 2023
    Dataset authored and provided by
    New York State Department of State
    Area covered
    Pacific Ocean, South Pacific Ocean
    Description

    This dataset displays potential future sea levels. The purpose of this dataset is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. The data and maps in this tool illustrate the scale of potential flooding, not the exact location, and do not account for erosion, subsidence, or future construction. Water levels are shown as they would appear during the highest high tides (excludes wind driven tides). The data, maps, and information provided should be used only as a screening-level tool for management decisions. This dataset was created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer depicting potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The purpose of this dataset is to show potential sea level rise inundation of 1 ft above current Mean Higher High Water (MHHW) for the area. Tiles have been cached down to Level ID 15 (1:18,055). This dataset illustrates the scale of potential flooding, not the exact location, and does not account for erosion, subsidence, or future construction. Inundation is shown as it would appear during the highest high tides (excludes wind driven tides) with the sea level rise amount. The dataset should be used only as a screening-level tool for management decisions. As with all remotely sensed data, all features should be verified with a site visit. The dataset is provided "as is," without warranty to its performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of this dataset is assumed by the user. This dataset should be used strictly as a planning reference and not for navigation, permitting, or other legal purposes. For more information visit the Sea Level Rise Impacts Viewer (http://coast.noaa.gov/slr).View Dataset on the Gateway

  20. A

    Mean Higher High Water (MHHW) Sea Level: Honolulu, Hawaii

    • data.amerigeoss.org
    • data.ioos.us
    • +1more
    wfs, wms
    Updated Jul 15, 2019
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    ioos (2019). Mean Higher High Water (MHHW) Sea Level: Honolulu, Hawaii [Dataset]. https://data.amerigeoss.org/vi/dataset/mean-higher-high-water-mhhw-sea-level-honolulu-hawaii
    Explore at:
    wfs, wmsAvailable download formats
    Dataset updated
    Jul 15, 2019
    Dataset provided by
    ioos
    Area covered
    Hawaii, Honolulu
    Description

    The single value tidal water surface of mean higher high water (MHHW) modeled at the Honolulu tide gauge is used to represent present-day sea level for the urban corridor stretching from Honolulu International Airport to Waikiki and Diamond Head along the south shore of Oahu in the state of Hawaii. Water levels are shown as they would appear during the highest high tides (excluding wind-driven tides). Land elevation was derived using a National Geospatial Agency (NGA)-provided digital elevation model (DEM) based on LiDAR data of the Honolulu area collected in 2009. This "bare earth" DEM (vegetation and structures removed) was used to represent the current topography of the study area above zero elevation. The accuracy of the DEM was validated using a selection of 16 Tidal Benchmarks located within the study area. Data produced in 2014 by Dr. Charles "Chip" Fletcher of the department of Geology & Geophysics (G&G) in the School of Ocean and Earth Science and Technology (SOEST) of the University of Hawaii at Manoa. Supported in part by the NOAA Coastal Storms Program (CSP) and the University of Hawaii Sea Grant College Program. These data should be used strictly as a planning reference and not for navigation, permitting, or other legal purposes.

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Esri (2022). U.S. Coastal Inundation from Sea Level Rise [Dataset]. https://hub.arcgis.com/maps/cab265835317461e818f13eabc242ed1
Organization logo

U.S. Coastal Inundation from Sea Level Rise

Explore at:
Dataset updated
Nov 10, 2022
Dataset authored and provided by
Esrihttp://esri.com/
License

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

Area covered
Description

The sea level rise (SLR) coastal inundation layers were created using existing federal products: the (1) NOAA Coastal Digital Elevation Models (DEMs) and (2) 2022 Interagency Sea Level Rise Technical Report Data Files. The DEMs for the Continental United States (CONUS) are provided in North American Vertical Datum 1988 (NAVD 88) and were converted to Mean Higher High Water (MHHW) using the NOAA VDatum conversion surfaces; the elevation values are in meters (m). The NOAA Scenarios of Future Mean Sea Level are provided in centimeters (cm). The MHHW DEMs for CONUS were merged and converted to cm and Scenarios of Future Mean Sea Level were subtracted from the merged DEM. Values below 0 represent areas that are below sea level and are “remapped” to 1, all values above 0 are remapped to “No Data”, creating a map that shows only areas impacted by SLR. Areas protected by levees in Louisiana and Texas were then masked or removed from the results.Scenario: For each of the 5 GMSL scenarios (identified by the rise amounts in meters by 2100--0.3 m , 0.5 m. 1.0 m, 1.5 m and 2.0 m), there is a low, medium (med) and high value, corresponding to the 17th, 50th, and 83rd percentiles. Scenarios (15 total): 0.3 - MED, 0.3 - LOW, 0.3 - HIGH, 0.5 - MED, 0.5 - LOW, 0.5 - HIGH, 1.0 - MED, 1.0 - LOW, 1.0 - HIGH, 1.5 - MED, 1.5 - LOW, 1.5 - HIGH, 2.0 - MED, 2.0 - LOW, and 2.0 - HIGH Years (15 total): 2005, 2020, 2030, 2040, 2050, 2060, 2070, 2080, 2090, 2100, 2110, 2120, 2130, 2140, and 2150Report Website: https://oceanservice.noaa.gov/hazards/sealevelrise/sealevelrise-tech-report.htmlGeneral DisclaimerThe data and maps in this tool illustrate the scale of potential flooding, not the exact location, and do not account for erosion, subsidence, or future construction. Water levels are relative to Mean Higher High Water (MHHW) (excludes wind driven tides). The data, maps, and information provided should be used only as a screening-level tool for management decisions. As with all remotely sensed data, all features should be verified with a site visit. Hydroconnectivity was not considered in the mapping process. The data and maps in this tool are provided “as is,” without warranty to their performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of these data is assumed by the user. This tool should be used strictly as a planning reference tool and not for navigation, permitting, or other legal purposes.SLR data are not available for Hawaii, Alaska, or U.S. territories at this time.Levees DisclaimerEnclosed levee areas are displayed as gray areas on the maps.Major federal leveed areas were assumed high enough and strong enough to protect against inundation depicted in this viewer, and therefore no inundation was mapped in these regions. Major federal leveed areas were taken from the National Levee Database.Minor (nonfederal) leveed areas were mapped using the best available elevation data that capture leveed features. In some cases, however, breaks in elevation occur along leveed areas because of flood control features being removed from elevation data, limitations of the horizontal and vertical resolution of the elevation data, the occurrence of levee drainage features, and so forth. Flooding behind levees is only depicted if breaks in elevation data occur or if the levee elevations are overtopped by the water surface. At some flood levels, alternate pathways around—not through—levees, walls, dams, and flood gates may exist that allow water to flow into areas protected at lower levels. In general, imperfect levee and elevation data make assessing protection difficult, and small data errors can have large consequences.Citations2022 Sea Level Rise Technical Report - Sweet, W.V., B.D. Hamlington, R.E. Kopp, C.P. Weaver, P.L. Barnard, D. Bekaert, W. Brooks, M. Craghan, G. Dusek, T. Frederikse, G. Garner, A.S. Genz, J.P. Krasting, E. Larour, D. Marcy, J.J. Marra, J. Obeysekera, M. Osler, M. Pendleton, D. Roman, L. Schmied, W. Veatch, K.D. White, and C. Zuzak, 2022: Global and Regional Sea Level Rise Scenarios for the United States: Updated Mean Projections and Extreme Water Level Probabilities Along U.S. Coastlines. NOAA Technical Report NOS 01. National Oceanic and Atmospheric Administration, National Ocean Service, Silver Spring, MD, 111 pp. https://oceanservice.noaa.gov/hazards/sealevelrise/noaa-nostechrpt01-global-regional-SLR-scenarios-US.pdf

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