green and gray infrastructure - conference.ifas.ufl.edu tuesday/2 key... · acknowledgments...
TRANSCRIPT
Exponent.com
Green and Gray Infrastructure: A Spatial framework for considering impacts
The Nature Conservancy-Dow Collaboration Dec 11, 2012
Tim Boucher1, Sheila Walsh1 ,Jorge Brenner1, Rob Griffin2, Greg Guannel2, Anne Guerry2, Jen Molnar1
1. The Nature Conservancy 2. The Natural Capital Project
Losses from Natural Hazards are Increasing
Ecosystems Can Mitigate Losses
Wav
e A
tten
uat
ion
(Gedan et al. 2011)
A framework
Goal: Method for Integrated Hazard Planning
Assess value Value of coastal habitats to
business, community, ecosystems
Evaluate Options Habitat protection, restoration,
gray infrastructure
Develop Strategy Integrate green infrastructure
portfolio into planning
Landcover and Green Infrastructure Scenarios
High Green
Moderate Green
No Green/High Development
Landcover and Green Infrastructure Scenarios
High Green
• Dry Land below 2100 SLR salt line gets restored or allowed to convert to wet/marsh
• Developed below SLR remains*
Landcover and Green Infrastructure Scenarios
Moderate Green
• Limited Development – 2040 projections • Protect or restore wet habitats with
highest expected net benefits
Landcover and Green Infrastructure Scenarios
No Green/High Development
• All Possible Development by 2025
Sea Level Affecting Marshes Model (SLAMM)
Sea Level Affecting Marshes Model (SLAMM)
Within SLAMM, there are six primary processes:
1. Inundation: T he rise of water levels and the salt boundary
2. Erosion: Triggered based on a threshold of maximum fetch and the proximity
of the wetland to estuarine water or open ocean.
3. Overwash: Barrier islands of under 500 meter width are assumed to undergo
overwash during each 25 year time-step due to storms encountered.
4. Saturation: Coastal swamps and fresh marshes can migrate onto adjacent
uplands as a response of the water table to rising sea level close to the coast.
5. Accretion: Upward movement of marshes due to sequestration of sediments
and biogenic production.
6. Salinity: Optional. In a location with defined fresh-water flows, land categories
can migrate based on changes in salinity.
Lidar DEM
Infrastructure
Land Use – Current
Land Use – 2040
Current Land Cover - NLCD
Impervious Surfaces > 20%
Current Land Cover - NWI
Current Land Cover
Current Land Cover - Diked
Current Land Cover
High Green: 1 m SLR– 2100
Moderate Green: 1 m SLR– 2100
Expected Outcomes
Public Benefits • Avoided storms damages • Carbon Sequestration • Recreation & Fisheries
Business Benefits • Hybrid solution offers lowest cost
Conservation Benefits • Demonstrating value of investments in nature
Advancing Science • Advancing ecosystem service science
Acknowledgments
• TNC-Sustainability Science: Sheila Walsh, Jon Fisher, Anthony Rogers, Alex Maas, Jen Molnar
• Dow: Doug Whipple, Daniel Ramirez, John DiMuro, Judy Gunderson
• TNC-Texas: Michael Thompson, Jorge Brenner
• Natural Capital Project: Greg Guannel, Rob Griffin, Joe Faries, Joey Bernhardt, Greg Verutes, Spencer Woods, Jess Silver, Jodie Taft, Anne Guerry
• TNC-Global Marine: Mike Beck, Chris Shepard
• Warren Pinnacle Consulting: Jonathon Clough, Marco Propato, Amy Polaczyk
DOW RESTRICTED - For internal use only