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What's new // Sumas Lake

Sumas Lake

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  • Drone image of Sumas Prairie farm fields flooded.
    Scientific literature

    New study identifies the cost of restoring the Sumas Xhotsa (Lake) as a tool for reconciliation, climate adaptation, and ecosystem restoration

    2024 July 182024 December 13

    The research weaves together Indigenous laws with an economic analysis to determine the cost of implementing ‘managed retreat’ as a nature-based solution to flood risk in the Lower Fraser region.

    Read More New study identifies the cost of restoring the Sumas Xhotsa (Lake) as a tool for reconciliation, climate adaptation, and ecosystem restorationContinue

  • Map of the Semá:th X̱ó:tsa (Sumas Lake) region of BC showing the historic Sumas Lake and freshet, 2021 floodwaters, and water sampling sites.
    Map science

    Mapping the Semá:th X̱ó:tsa (Sumas Lake) region following the BC floods of 2021

    2023 November 152024 July 8

    Our new map shows water quality sampling sites and the re-emergence of Sumas Lake after the 2021 floods.

    Read More Mapping the Semá:th X̱ó:tsa (Sumas Lake) region following the BC floods of 2021Continue

  • Group of people sampling water in a river.
    Tracking Raincoast

    Working toward healthy waters for people, salmon, and whales

    2022 December 272024 July 8

    We will be applying our community-based water pollution monitoring plan to select watersheds across southern BC in 2023.

    Read More Working toward healthy waters for people, salmon, and whalesContinue

  • Person holding the report.
    In the media

    We need to understand the extent to which floods further degrade fish habitat

    2022 December 212024 July 8

    Our findings painted a bleak picture of the health of the waterways meandering through the remnants of Sumas Lake, drained nearly 100 years ago by the Barrowtown Pump Station.

    Read More We need to understand the extent to which floods further degrade fish habitatContinue

  • Aerial view of the Barrowtown pump station.
    Backgrounders

    A former lake re-emerges: A backgrounder

    2022 November 172024 July 8

    The catastrophic floods of late 2021 in southern British Columbia (Canada) and neighbouring Washington State (USA) destroyed homes, farms, and businesses, with excess water spilling debris, animal carcasses, and diesel fuel into historically productive fish habitat.

    Read More A former lake re-emerges: A backgrounderContinue

  • Sumas Prairie.
    Investigate and inform

    Restoring Sumas Lake is an important step in B.C. flood recovery, climate adaptation and reconciliation

    2022 April 192024 July 8

    We call on all governments to pause and reflect on an alternative path for the Sumas region – one that acknowledges the ongoing threat posed by climate-change-induced flooding, the cost and risk of “business as usual” and the need for innovative, informed and inspired regional planning to support climate adaptation and reconciliation.

    Read More Restoring Sumas Lake is an important step in B.C. flood recovery, climate adaptation and reconciliationContinue

  • People working together to take samples of water in jars.
    Investigate and inform

    Assessing whether the 2021 floods caused a spillover of pollutants into fish habitat in the lower Fraser Valley

    2022 March 242024 October 23

    We embarked upon an emergency water sampling program in the Sumas area during a 10-week period.

    Read More Assessing whether the 2021 floods caused a spillover of pollutants into fish habitat in the lower Fraser ValleyContinue

  • Peter Ross from the Healthy Waters program, walks along the rocks.
    Investigate and inform

    Rising waters, pollution spillover, and salmon habitat in the Sumas Lake area of the Lower Fraser Valley: The catastrophic ‘atmospheric rivers’ of 2021

    2022 February 232024 July 8

    November of 2021 was a month like many others for the temperate rainforest of coastal British Columbia – variable winds from the Southwest, skies grey, and an abundance of … precipitation. What set this year apart was the cumulative amount of rainfall in Vancouver – 312mm for the month of November – well above the…

    Read More Rising waters, pollution spillover, and salmon habitat in the Sumas Lake area of the Lower Fraser Valley: The catastrophic ‘atmospheric rivers’ of 2021Continue

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