Dynamic Surface Water Maps of Canada from 1984-2023 Landsat Satellite Imagery

Dynamic Surface Water Maps of Canada from 1984-2023 Landsat Satellite Imagery Knowledge of the location of Earth’s surface water in time and space is critical to inform policy decisions on environment, wildlife, and human security. Dynamic surface water maps generally represent water occurrence, also referred to as inundation frequency, depicting the percentage of valid observations when water is detected at the surface. The location and duration of surface water varies from areas of permanent water with 100% inundation frequency where water is always observed, to areas of permanent land with 0% inundation where water never occurs. Between these two extremes are areas of ephemeral water that experience periodic flooding with inundation frequencies between 0-100%. National-scale dynamic surface water information was generated for years 1984-2023 at 30m spatial resolution from the historical Landsat archive over Canada. The complete dataset consists of annual water maps and derived products including inundation frequency and inter-annual wetting and drying trends calculated using per-pixel logistic regression. The complete dataset enables an assessment of the timing, duration, and trends towards wetting or drying at regional to national scales. Associated publication: https://www.sciencedirect.com/science/article/pii/S0034425722002358 2024-05-30 Environment and Climate Change Canada ian.olthof@ec.gc.ca Form DescriptorsNature and EnvironmentScience and Technologyinundation frequencyremote sensingLandsatwaterwetlandswater managementfloodsCanadaNorth AmericaWestern HemisphereNorthern HemisphereWaterWetlandsWater managementWater conservationFloodsGeographic dataRemote sensing Yearly Water Mask 1984TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1984-mask.tif Dynamic Surface Water Maps 1984-2023 - Frequency MapWMS https://datacube.services.geo.ca/web/dynamic-surface-water.xml?request=GetCapabilities&service=WMS&version=1.3.0&layers=dsw-frequency&legend_format=image%2Fpng&feature_info_type=text%2Fxml Yearly Water Mask 1985TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1985-mask.tif Yearly Water Mask 1986TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1986-mask.tif Yearly Water Mask 1987TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1987-mask.tif Yearly Water Mask 1988TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1988-mask.tif Yearly Water Mask 1989TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1989-mask.tif Yearly Water Mask 1990TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1990-mask.tif Yearly Water Mask 1991TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1991-mask.tif Yearly Water Mask 1992TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1992-mask.tif Yearly Water Mask 1993TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1993-mask.tif Yearly Water Mask 1994TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1994-mask.tif Yearly Water Mask 1995TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1995-mask.tif Yearly Water Mask 1996TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1996-mask.tif Yearly Water Mask 1997TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1997-mask.tif Yearly Water Mask 1998TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1998-mask.tif Yearly Water Mask 1999TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-1999-mask.tif Yearly Water Mask 2000TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2000-mask.tif Yearly Water Mask 2001TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2001-mask.tif Yearly Water Mask 2002TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2002-mask.tif Yearly Water Mask 2003TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2003-mask.tif Yearly Water Mask 2004TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2004-mask.tif Yearly Water Mask 2005TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2005-mask.tif Yearly Water Mask 2006TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2006-mask.tif Yearly Water Mask 2007TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2007-mask.tif Yearly Water Mask 2008TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2008-mask.tif Yearly Water Mask 2009TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2009-mask.tif Yearly Water Mask 2010TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2010-mask.tif Yearly Water Mask 2011TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2011-mask.tif Yearly Water Mask 2012TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2012-mask.tif Yearly Water Mask 2013TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2013-mask.tif Yearly Water Mask 2014TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2014-mask.tif Yearly Water Mask 2015TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2015-mask.tif Yearly Water Mask 2016TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2016-mask.tif Yearly Water Mask 2017TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2017-mask.tif Yearly Water Mask 2018TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2018-mask.tif Yearly Water Mask 2019TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2019-mask.tif Dynamic Surface Water Maps 1984-2023 - Web Map ServiceWMS https://datacube.services.geo.ca/ows/dynamic-surface-water?service=WMS&request=Getcapabilities Yearly Water Mask 2020TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2020-mask.tif Yearly Water Mask 2021TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2021-mask.tif Inundation Frequency 1984-2023TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-compilation/dsw-1984-2023-frequency.tif Inundation Trends 1984-2023TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-compilation/dsw-1984-2023-trends.tif Dynamic Surface Water Maps 1984-2023 - Frequency MapWMS https://datacube.services.geo.ca/web/dynamic-surface-water.xml?request=GetCapabilities&service=WMS&version=1.3.0&layers=dsw-frequency&legend_format=image%2Fpng&feature_info_type=text%2Fxml Yearly Water Mask 2022TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2022-mask.tif Yearly Water Mask 2023TIFF https://datacube-prod-data-public.s3.ca-central-1.amazonaws.com/store/water/dynamic-surface-water/dynamic-surface-water-annual/dsw-2023-mask.tif

Knowledge of the location of Earth’s surface water in time and space is critical to inform policy decisions on environment, wildlife, and human security. Dynamic surface water maps generally represent water occurrence, also referred to as inundation frequency, depicting the percentage of valid observations when water is detected at the surface. The location and duration of surface water varies from areas of permanent water with 100% inundation frequency where water is always observed, to areas of permanent land with 0% inundation where water never occurs. Between these two extremes are areas of ephemeral water that experience periodic flooding with inundation frequencies between 0-100%. National-scale dynamic surface water information was generated for years 1984-2023 at 30m spatial resolution from the historical Landsat archive over Canada. The complete dataset consists of annual water maps and derived products including inundation frequency and inter-annual wetting and drying trends calculated using per-pixel logistic regression. The complete dataset enables an assessment of the timing, duration, and trends towards wetting or drying at regional to national scales.

Associated publication:

https://www.sciencedirect.com/science/article/pii/S0034425722002358

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Electronic Mail Address: ian.olthof@ec.gc.ca

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