meeting the challenge of climate change€¦ · • oro loma horizontal levee pilot project photos:...
TRANSCRIPT
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Meeting the Challenge of Climate Change
Christina TomsSenior Environmental Scientist (Specialist)
Mike Filipoff, CA King Tides Project
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Climate Change Threats
• More frequent and severe droughts and floods
• Sea level rise
Photo: Christina Toms Bothin Marsh, Mill Valley2
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Projected Sea Level Rise
Graphic: OPC 2017 3
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Climate Change Threats
• More frequent and severe droughts and floods
• Sea level rise• Coastal flooding,
overtopping, erosion• Higher groundwater tables• Drowning of tidal marshes
Photo: Christina Toms Bothin Marsh, Mill Valley4
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Wetland Policy Update
• What we’re doing
• What we’ve learned
• What we’re going to do
Photo: Christina Toms Gallinas Creek, San Rafael5
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What We’re Doing
1. Case studies: Planning and permitting projects
2. Engaging in collaborations and outreach
3. Supporting the Adaptation Atlas
Photo: CA King Tides Project Arrowhead Marsh, Oakland6
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1. Case Studies: Project Planning and Permitting
Photo: Christina Toms Bothin Marsh, Mill Valley7
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Key Water Board Authorities
• Placement of fill in wetlands and waters
• Dredging and beneficial reuse
• Nearshoredischarge of treated wastewater
Graphic: Christina Toms 8
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CA Wetlands Conservation Policy• “No Net Loss”
• Ensures no overall net loss and a long-term net gainin wetlands acreage, functions, and values
• Emphasizes regional restoration goals, planning, and strategies
Photo: Christina Toms Hill Slough, Suisun Marsh9
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The Complete Tidal Marsh• Important habitats above the high tide line (HTL)
The Complete Marsh: extends below and above the tides
~HTL
Not our typical jurisdiction
Graphic: BEHGU 10
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Features Above the High Tide Line
Sears Point, Sonoma County
Photos: Christina Toms, Peter Baye
Muzzi Marsh, Corte Madera
marsh mound
Shell Beach, Foster City
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Case Studies: Multi-Benefit Projects
• Tidal wetland restoration
• Shoreline adaptation
• Grey infrastructure
• Green/nature-based infrastructure
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Tidal Wetland Restoration• South Bay
Shoreline (San Jose) Protection Project
Graphic: USACE
ALVISOWASTEWATER
FACILITY
LEVEE
Ecotone (transitional habitat)Levee
Tidal Marsh RestorationUnion Pacific Railroad Crossing 1
2 Artesian Slough Tide Gate& Pedestrian Bridge
N
TIE INTO ACCREDITED LEVEE
TIE INTO ACCREDITED LEVEE
WATER PURIFICATION
CENTER
12
A18
A12
A13
A15A14
A11
A9
A10
ECOTONE AND LEVEE CROSS SECTION
Deep to Shallow
Sub-tidalMiddleMarsh
HighMarsh
Wetland/Upland
Transitional Zone
LowMarsh
UplandGrassland(Levee)
Inter-tidal
Mudflat
MLLW
MTL
MHW
MHHW
NOT TO SCALE
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Tidal Wetland Restoration• South Bay Shoreline (San Jose) Protection Project
Graphic: Tahsa Sturgis based on USACE
Shallow Subtidal
Sea Level Rise 2067
Intertidal Mudflat
Middle Marsh
Low Marsh
Middle Marsh
Current Sea LevelUpland
GrasslandHigh
Marsh
New Levee
Net Loss
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Grey Infrastructure• Foster City Levee Improvement Project
Photos: Christina Toms, Graphic: Schaaf & Wheeler
Proposed sheet pile wall design
3rd Ave. Beach Shell Beach
Existing leveeNew backfill
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Nature-Based Infrastructure• Aramburu Island
(Mill Valley) Beach Enhancement Project (led by Water Board!)
Photos: Stuart Siegel, Kerry Wilcox, Graphic: Richardson Bay Audubon Center 16
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Dredging and Beneficial Reuse• Novato Creek 2016 Dredge and Thin-Lift
Placement
Photos: Roger Leventhal
Removing sediment from the creek
Placing excavated sediment in a thin layer
The foundation of what will eventually become a new flood control levee17
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Nearshore Discharge of Treated Wastewater
• Oro Loma Horizontal Levee Pilot Project
Photos: Christina Toms
Water Board staff with Dr. Peter Baye and Dr. David Sedlak
Wetland plants on the horizontal levee
Willows on the horizontal levee
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2. Collaboration & Outreach
Photo: Christina Toms Gallinas Creek, San Rafael19
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San Francisco Bay Restoration Regulatory Integration Team
• Inter-agency coordination of permitting for multi-benefit projects
• Outgrowth of SF Bay Restoration Authority
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Bay Conservation and Development Commission
• Bay Plan Amendment on Fill for Habitat• Adapting to Rising Tides Project
Photos: Megan Hall 21
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Wetland Regional Monitoring Program
• Core Team, Steering Committee, and Science Advisory Team
• Lead the Physical Processes Team• Four workshops with a broad range of
decision-makers and scientists
Graphics: SFEP 22
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National and Regional Forums
• EPA Wetland Type Conversion Workgroup
• NOAA: National Thin-Lift Sediment Placement Technical Advisory Committee (TAC)
• Coastal Conservancy: Living Shorelines TAC
• The Nature Conservancy: Natural Infrastructure in California TAC
• SF Bay Joint Venture: Science Steering Committee
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Conferences & Workshops
• Bay-Delta Science Conference
• State of the Estuary Conference
• Restoring America’s Estuaries Summit
• Living Shorelines Tech Transfer Workshop
• Beneficial Reuse of Treated Wastewater Workshop
Photo: Heidi Nutters 24
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Collaborative Project Planning• Bothin Marsh Evolving Shorelines (Mill Valley)
• Pond A8 Area (San Jose)
• Novato Baylands & Highway 37 Corridor
• San Pedro Road (San Rafael)
• Peyton Slough (Martinez)
Graphics: OneTam, SFEI 25
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Collaborative Project Planning
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3. Operational Landscape Units
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What We’ve Learned
Photo: CA King Tides Project Cooley Landing Marsh, East Palo Alto28
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Key Regulatory Opportunities
1. Clarify how we will apply “No Net Loss” for• Horizontal and ecotone levees• Living shorelines, beaches, dunes, and hybrid
“green-grey” infrastructure• Strategic/thin-lift sediment placement• High tide refugia
Photo: Christina Toms China Camp Marsh, San Rafael29
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Key Regulatory Opportunities2. Identify benefits of “complete” tidal wetland
systems
3. Identify preferred strategies for SLR adaptation – Adaptation Atlas
4. Provide technical guidance for projects
Photo: CA King Tides Project Crown Beach, Alameda30
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Key Regulatory Opportunities
5. Clarify acceptable wetland type conversions
6. Consider temporal and spatial tradeoffs and uncertainties
7. Define “multi-benefit” projects
8. Incentivize landward alignments of shoreline protection, movement of natural shorelines
9.
Photo: Christina Toms Sonoma Baylands31
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Key Regulatory Opportunities9. Minimize shoreline hardening
10.Evaluate mitigation on a regional basis
11.Support regional tidal wetland monitoring
Photo: CA King Tides Project San Francisco Embarcadero32
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What We’re Going To Do
San Pedro Road, China Camp State Park 33
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Leverage Internal and External Resources• Continue existing collaborations and outreach
• Identify internal project team
• Develop external advisory committee
Photo: Sabrina Brennan Oyster Point, South San Francisco34
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Climate Change Technical Report
• Further technical detail• Climate change and the Bay’s tidal wetlands
• Permitting procedures and case studies
• Key regulatory challenges and opportunities
• Next steps: Developing an update regulatory framework
• Internal and external peer review• Release: This summer
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Stakeholder Engagement Strategy• Hold workshops with Staff and Board on key
technical and policy issues
• Collaborate on policy updates
Photo: Austin Payne Waterfront Road, Martinez36
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New Partnerships
• Metropolitan Transportation Commission
• Bay Area Flood Protection Agencies Association (BAFPAA) Climate Hazards Adaptation Resiliency Group (CHARG)
• Bay Area Regional Collaborative (BARC)
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Acknowledgments
• Water Board: Naomi Feger, Lisa Horowitz McCann, Thomas Mumley, Xavier Fernandez, Keith Lichten, Richard Looker, Sami Harper
• SFEI: Julie Beagle, Warner Chabot, Josh Collins, Letitia Grenier, Jeremy Lowe
• Photos: California King Tides Project, http://www.coastal.ca.gov/kingtides/
Photo: Erik Grijalva Amtrak Capitol Corridor, Suisun38