6 cavi greenshores brianemmett
TRANSCRIPT
Presented by:Brian Emmett, Archipelago Marine Research Ltd.
Green ShoresGreen ShoresSustainable Approaches to
Shore Design and Development
CAVI Workshop Victoria BC June 03. 2007
The Green ShoresGreen Shores ProjectPromotes sustainable use of coastal ecosystems
through planning and design that:
• recognizes ecological features and functions• connects people to the shore environment• delivers triple bottom line benefits• recognizes the need for an integrated design
approach
www.stewardshipcentre.bc.ca
A Project of the:
CAVI Workshop Victoria BC June 03. 2007
Green ShoresGreen Shores Guiding Principles
Principle 1. Preserve the integrity and connectivity of coastal processes
Principle 2. Maintain and enhance habitat diversity and ecological function
Principle 3. Minimize or reduce pollutants to the marine environment
Principle 4. Minimize or reduce cumulative impacts to the coastal environment
CAVI Workshop Victoria BC June 03. 2007
What Green ShoresGreen Shores is working on:1. A Rating and Assessment Tool - modeled after the
LEED certification system for Green Buildings.
2. Support for Local Government Planning - a review of existing bylaws to develop model language to support Green Shores principles.
3. Case Examples and Conceptual Designs –partnering with developers and local government to test and refine Green Shore tools.
4. An Outreach Program – both public and professional.
CAVI Workshop Victoria BC June 03. 2007
Why is Green ShoresGreen Shores Needed?
Herring spawn on rocks and vegetation in nearshore areas
Sandlance, important food for adult salmon, spawn on beaches
Midshipmen, a deep water fish, spawn under intertidalrocks in the late spring(photos by Shannon Bard, Dalhousie U)
The riparian zone is an important food source for juvenile salmon
Our nearshore zones support important biological functions
CAVI Workshop Victoria BC June 03. 2007
sediment
source
transport
sediment sinkOur nearshore zones support important physical functions
Why is Green ShoresGreen Shores Needed?
CAVI Workshop Victoria BC June 03. 2007
Upland runoff impacts coastal resources and recreational values
Why is Green ShoresGreen Shores Needed?
CAVI Workshop Victoria BC June 03. 2007
Predicted Sea Level Change
West Coast Climate Change Scenario
• warmer
• wetter
• more storms
• sea level rise
20-86 cm rise to year 2100
(CSSG: 10)
Why is Green ShoresGreen Shores Needed?
CAVI Workshop Victoria BC June 03. 2007
Our development practices can disrupt these functions (at times unknowingly)
CAVI Workshop Victoria BC June 03. 2007
Different Shores, Different Concerns
Rocky Shore• Stable and erosion
resistant
Beaches• Beach sediment processes
and shore erosion are important management considerations
Stream Deltas/Estuaries• Important to consider stream
processes in managing these areas
CAVI Workshop Victoria BC June 03. 2007
Shore Management Issues
Loss of Riparian Vegetation• Brushing and tree cutting• Lawns extending to natural boundary – seawalls in waiting• Loss of wildlife habitat value• Loss of food input to the nearshore zone
CAVI Workshop Victoria BC June 03. 2007
Shore Management Issues
Hardened Shores• Seawalls can increase beach erosion at the seawall toe
and disrupt sediment movement• Hardened shores reduce habitat complexity and diversity • Loss of important ecological function
CAVI Workshop Victoria BC June 03. 2007
Shore Management Issues
Encroachment Protective works encroach on the natural boundary• impacting riparian and beach habitat • impacting shore processes• impacting public access
CAVI Workshop Victoria BC June 03. 2007
These are cumulative impacts
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BrentwoodBay
Sidney
MillBay
Saa
nich
Inle
t
Haro Strait
SaltspringIsland
Shore Modificationnone0 - 33%33 - 66%>66%
5 0 5 Kilometers
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BrentwoodBay
Sidney
MillBay
Saa
nich
Inle
t
Haro Strait
SaltspringIsland
Riparian Extentnone1 - 33 %34 - 66 %66 - 100 %
5 0 5 Kilometers
Shore Modification - Saanich Peninsula
none, 65%boat ramps, 0%
concrete seawall, 14%
landfill, 4%
rip-rap, 16%
sheet pile, 0%
wooden seawall, 1%
CAVI Workshop Victoria BC June 03. 2007
1Innovation117
1Outreach and Public Education
1Re-use of Local Materials11Stormwater and Septic
1Integrated Design Process
1Environmental Management Plan11Sediment Transport Processes1Shore Lighting
11Riparian Zone
1Habitat Restoration
1Designated Sensitive Habitats and Imperiled Species
1Public Access (alongshore)
1Re-Development of Manmade Shores
1Brown Field Re-Development
1Building Siting
OptionalRequired Green Shores Credit Categories
Draft List of Rating Credits
March 2007
CAVI Workshop Victoria BC June 03. 2007
Design Examples
Ross Bay, Victoria
New Seawall, 1915
Toe of Seawall, 1996
Gravel Beach, 1998
CAVI Workshop Victoria BC June 03. 2007
Limit of wave run-up during stormsHW
Boulders
Storm Berm
Plantings
Upper Level of Marine Vegetation
Setback sea defence
Protective Design Alternative
Protective berm, Samish Island - Johannessen, 2001
CAVI Workshop Victoria BC June 03. 2007
Case Examples
Robert’s Creek – Sunshine Coast1. Residential Waterfront2. Public Outreach 3. Shore Planning Objectives
(DPA and OCP)4. Specific Management Objectives
developed for different shore types
CAVI Workshop Victoria BC June 03. 2007
Case Examples
Dockside Green – Victoria1. A LEED Platinum Development2. Green Shores Bank Restoration3. Compatibility of LEED and
Green Shore Credits4. Test application of the rating
credits
CAVI Workshop Victoria BC June 03. 2007
Kensington Properties –Union Bay
1. Re-Development of Historic Coal Processing and Shipping Site
2. Compatibility of Green Shores approaches with the requirements of site remediation.
3. Test application of the rating credits
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EW
S
100 0 100 Meters
1978 HWL
2005 HWL
CAVI Workshop Victoria BC June 03. 2007
Bylaw Language Review
Review of existing language in BC bylaws and Washington State ordinances that reflect Green Green ShoreShore principles.Example language for use in OCPs, Development Permit Areas and Zoning bylaws – e.g., sample guidelines for:
• Shoreline stabilization methods • Docks, piers and ramps• Fill and dredging• Subdivision• Building construction
CAVI Workshop Victoria BC June 03. 2007
Bylaw Language Review
Envisioned as a “living document” with additions, updates and web postings – e.g.:
Guidelines specific to types of shorelines…• Rocky shores• Cobble beaches• “Drift sector” beaches – erosional/depositional• Pocket beaches• Low energy shores
CAVI Workshop Victoria BC June 03. 2007
Outreach ObjectivesGrow the Practice - Professionals and Practitioners –
rating system, practitioners workshopsGrow the Demand - Developers, property owners,
local government – work with leaders, built examples
Grow the Support - Community groups, real estate industry – deliver information and tools
Watch this space!www.stewardshipcentre.bc.ca but
CAVI Workshop Victoria BC June 03. 2007
In Summary
Green Value
Design with Nature
Green Infrastructure
Shores as environmental, social and economic amenities
Green Shore Principles and Ratings
Green Shore Designs
CAVI Workshop Victoria BC June 03. 2007
The Green ShoresGreen Shores PartnersTechnical Team
• Brian Emmett – Archipelago Marine Research Ltd.
• John Harper – Coastal and Oceans Resources Inc
• John Readshaw – SandwellEngineering
• Martine Desbois – MD and Associates
• Harriet Rueggeberg – LanarcConsultants
• Gretchen Harlow – Canadian Wildlife Service
Funding Partners• Bridge Coastal Legacy Fund• BC Real Estate Foundation• Habitat Conservation Trust
Fund• Ducks Unlimited• Dept. of Fisheries and Oceans• Comox/Strathcona RD• Sunshine Coast RD• District of Squamish
Advisory CommitteeBarry Janyk – Mayor of Gibson’s, BC
Anna Mathewson – FREMP
Doug Myers – PSAT
Rob Russell – DFO
Mike Rogozinski – BC Real Estate Foundation
Alex Zimmerman – BC Green Building Council
CAVI Workshop Victoria BC June 03. 2007
Storms > 45 knots per yearPreliminary
0
10
20
30
40
50
60
70
1953 1958 1963 1968 1973 1978 1983 1988 1993 1998 2003 2008
Year
Win
d Sp
eed
(kno
ts)
Smith Island annual max
E Juan de Fuca > 45 knots
Estimated JdF (post 2003)
CAVI Workshop Victoria BC June 03. 2007
Issues• Where to set the bar?• Clear requirements and submittals• Performance versus prescriptive credits• Application to single residential properties• Who does it?
What Next?• A peer review workshop and work group• Continued piloting• Revision and release
Green ShoreGreen Shore Rating Credits
CAVI Workshop Victoria BC June 03. 2007
Program Challenges• Finding time• Managing expectations• Program governance• Balancing Carrots and Sticks
Opportunities• The time is right• Funders and regulators are supportive• Champions are available
(practitioners, regulators, property owners and community groups)