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Context Peak District Bois-des Bel Conclusion Peatland … · 2019-04-05 · Peatland Restoration...

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  • Peatland Restoration for Water Regulation

    Jonathan Price (University of Waterloo)

    Tim Allot, Martin Evans (University of Manchester)

    Joint British Ecological Society and IUCN UK Peatland Symposium 2012 - Investing in Peatlands - Demonstrating Success

    Introduction Context Peak District Conclusion Bois-des Bel

  • Peatland Restoration for Water Regulation Water Restoration for Peatland Regulation

    Introduction Context Peak District Conclusion Bois-des Bel

    Blanket bog; Peak District, UK Lowland bog; Bois-des-Bel, QC, Canada

  • Degraded peatlands compromise water quality

    • Gully erosion and bare peat

    • Grips and peat drainage

    • Water table drawdown

    • Reduced peat accumulation

    • Aerobic decomposition

    Degraded peats and pollutants • Reduced/zero C, SO4,NO3, NH4, metal accumulation • Transformation from sink to source

    Drainage waters • High POC • Increased DOC • Increased SO4 and NO3 • Increased acidity • Elevated metals and toxic substances

    Image from Holden et al (2007)

    Introduction Context Peak District Conclusion Bois-des Bel

  • Progress of re-vegetation over 5 years

    Introduction Context Peak District Conclusion Bois-des Bel

  • Introduction Context Peak District Conclusion Bois-des Bel

  • -100

    0

    100

    200

    300

    400

    500

    600

    700

    WaterTableDepth(mm)

    Hourlywatertabledata:August-November2008

    Intact BarePeat Re-vegetated

    Introduction Context Peak District Conclusion Bois-des Bel

  • Re-vegetation shuts down suspended sediment production and release

    = data from intact reference site Evans M and Worrall (2009) NE Report

    Sediment Loads gC m2 a-1

    Joseph South 4.07

    Joseph North 1.43

    Trenches North Hi 157.64

    Trenches South 804.42

    Control 1.87

    1

    10

    100

    1000

    10000

    0.001 0.01 0.1 1 10 100 1000

    Q Ls-1km-2

    SS

    C m

    g/l

    Introduction Context Peak District Conclusion Bois-des Bel

  • Introduction Context Peak District Conclusion Bois-des Bel

  • Bois des Bel

    Introduction Context Peak District Conclusion Bois-des Bel

  • Introduction Context Peak District Conclusion Bois-des Bel

  • Introduction Context Peak District Conclusion Bois-des Bel

    VMC

  • Introduction Context Peak District Conclusion Bois-des Bel

    • Vegetation communities returned • 2010 (dry) C source < natural site • Vascular plants compensate for moss

  • Peatland Restoration for Water Regulation

    Hydrology Vegetation Topography

    Water deficit

    • Define appropriate, realistic restoration objectives • Establish a method • Monitor / Wait / Assess

    Introduction Context Peak District Conclusion Bois-des Bel

    (Bio)geochemistry and soils

    Eroding blanket bog Harvested lowland bog

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Peatland Restoration for Water Regulation Jonathan Price (University of Waterloo) Tim Allot, Martin Evans (University of Manchester) Joint British Ecological Society and IUCN UK Peatland Symposium 2012 - Investing in Peatlands - Demonstrating Success Introduction Context Peak District Conclusion Bois-des Bel
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