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The Water Balance Model: A Tool for Designing with Nature PowerPoint PPT Presentation


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Douglas College Rain Conference. The Water Balance Model: A Tool for Designing with Nature. www.waterbalance.ca. ‘Designing with Nature’ means:. Create Greener Communities Strive for a Lighter ‘Hydrologic Footprint’ Achieve Higher Levels of Stream Protection.

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The Water Balance Model: A Tool for Designing with Nature

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The water balance model a tool for designing with nature

Douglas College Rain Conference

The Water Balance Model:

A Tool for Designing with Nature


The water balance model a tool for designing with nature

www.waterbalance.ca


The water balance model a tool for designing with nature

‘Designing with Nature’ means:

  • Create Greener Communities

  • Strive for a Lighter ‘Hydrologic Footprint’

  • Achieve Higher Levels of Stream Protection


The water balance model a tool for designing with nature

Drainage Planning in BC Has Been Evolving Over the Decades

  • 1960s: Pipe and Remove

  • 1970s: Detain Peak Flows

  • 1980s: Reactive Mitigation

  • 1990s: Stream Stewardship*

  • 2000s: Sharing a Vision**

  • * Proactive Management

  • **Watershed-Based Rainwater Management


  • The water balance model a tool for designing with nature

    The “Trickle-Down” Evolution of Watershed Management in BC(How the Past is Influencing the Present)

    • 1970s - society’s reaction to the “dam builders”

    redefined the engineer’s role, and resulted in an “interdisciplinary and ecosystem approach” to watershed management outside the urban regions

    • 2000s - society’s reaction to the “pipe sizers”

    is similarly being translated into an “integrated approach” to urban watershed management at the local government level


    Inter governmental partnership vision

    Inter-Governmental Partnership: Vision

    • To promote changes in land development practices so that:

      • The built environment will preserve and/or restore the natural water balance over time

      • Performance targets will be achieved for rainwater runoff volume and flow rate reduction at the source, where rain falls


    The water balance model a tool for designing with nature

    The Mission is to Create a Legacy

    • Influence choices by individuals and organizations

    • Use the term “sustainability” as a lens for considering approaches that influence choices


    The water balance model a tool for designing with nature

    Water Sustainability Action Plan for British Columbia


    The water balance model a tool for designing with nature

    The Goal is Full Integration of Philosophy  Tool  StandardsTo Achieve the Desired Outcome


    The water balance model a tool for designing with nature

    The Missing Link in Watershed Planning has been...

    • A tool that quantifies the benefits – in terms of reducing rainwater runoff volume - of installing source controls under different land use, soil and climate conditions


    The water balance model a tool for designing with nature

    Water Balance Model promotes Integration of Perspectives

    • Planners: Tool for Better Use of Space

    • Engineers: Tool for Pre-Design

    • Landscape Architects:Tool for Green Solutions

    • Ecologists: Tool for Watershed Function

    • Educators: Tool for Social Marketing


    The water balance model a tool for designing with nature

    How the Water Balance Model can be used to make better decisions:

    • Local Governments - when communicating with the public

    • Planners and Engineers – when setting performance targets

    • Developers and their Consultants - when testing scenarios

    • Environmental Agencies - when monitoring watershed health


    The water balance model a tool for designing with nature

    The Water Balance Model can be applied at three scales:

    • Site

    • Subdivision

    • Watershed


    The water balance model a tool for designing with nature

    WBM

    Site Scale

    Building size

    Hard surface

    Landscaping

    CommunityLiveability


    The water balance model a tool for designing with nature

    What was a conversation…

    becomes interaction!


    The water balance model a tool for designing with nature

    WBM

    Subdivision Scale:

    Lot size

    Road Design

    Green space

    Landscaping

    CommunityLiveability


    The water balance model a tool for designing with nature

    WBM

    Watershed Scale:

    Zoning

    Road Design

    Green space

    Landscaping

    ‘BMPs’

    CommunityLiveability


    The water balance model a tool for designing with nature

    Actions on the Ground…

    • …Will Result in Cumulative Benefits Over Time!

    Graphic from Smart Growth BC


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