Download - R. Hancock
![Page 1: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/1.jpg)
R. Hancock
Sea Level Rise and the Conservation of Coastal Wetlands
LOCAL SOLUTIONS: Northeast Climate Preparedness Conference
May 20, 2014
![Page 2: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/2.jpg)
RI has lost 53% of its salt marshes over the last 200 years due to man-made alterations (Bromberg and Bertness, 2005)
Why does it matter?
Hancock 2009
![Page 3: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/3.jpg)
Why is Salt Marsh Important?
Forage and nursery habitatNesting and migratory sites
Carbon sink
• $6,471/acre/yr for maintaining fisheries (US East Coast) • $75 M in commercial fishery landings (RI)• $150 M recreational fishery (RI)
![Page 4: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/4.jpg)
Why is Salt Marsh Important?
Reduces storm damage$2,931/acre/year (RI)
Costanza et al., 2008
$5 billion of Rhode Island property protected by coastal habitats by 2100
Arkema et al., 2013
![Page 5: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/5.jpg)
Why is Salt Marsh Important?
Clean water:trap sediments, sequester nitrogen
$780-$15,000/acre/yr for water purification
![Page 6: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/6.jpg)
2010
2004
STB’s 10 years of restoration monitoring has shown that conditions can change rapidly in tidally restricted marshes
Recently, similar degraded conditions have been observed in marshes with no tidal restrictions
2010Source: Save The Bay
![Page 7: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/7.jpg)
High Tides Affect our Communities Today
Bold Point Park East Providence
J. Boyd, 10/27/11 2’ MHHW
South Shore Ave., Warwick
W. Ferguson, 06/04/12 2.4’ MHHW
North Avenue, Jamestown
R. Calabro, 06/03/12 2’ MHHW
American Tourister, Warren
R. Calabro, 09/29/11 2.2’ MHHW
![Page 8: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/8.jpg)
Impediments to Coastal Marsh Migration
![Page 9: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/9.jpg)
Project Framework1. Develop marsh migration modeling results2. Identify existing vulnerable wetlands3. Identify upland parcels where wetlands will
likely migrate4. Develop new state coastal program
adaptive strategies, policies and standards5. Increase local capacity to proactively
incorporate adaptation policy for wetlands (comprehensive plans, zoning codes, etc.)
![Page 10: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/10.jpg)
Opportunities for Upland Migration and Restoration
Opportunities for Upland Migration and Restoration
With the proper conditions, salt marsh can migrate upland
We can model likely future habitat
![Page 11: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/11.jpg)
Model Inputs - Each area is unique
![Page 12: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/12.jpg)
Modeling – Current Conditions
![Page 13: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/13.jpg)
Model Results – 1’ SLR
![Page 14: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/14.jpg)
Model Results – 3’ SLR
![Page 15: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/15.jpg)
Model Results – 5’ SLR
![Page 16: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/16.jpg)
Municipal Work Sessions: Identifying Issues & Opportunities
![Page 17: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/17.jpg)
Barrington
Much of this land is protected or under easement, so future migration will be possible
Consider buyouts
Property flooding and “road shortening”
![Page 18: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/18.jpg)
Bristol
Redirect traffic
New causeway
Enlarge culverts
Impassable during Sandy
Low-lying area; currently floods during storms
![Page 19: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/19.jpg)
East Providence
This will be a park
Enlarge culvert
Raise road to improve flushing
Move mow line back at golf course
Move parking lot back
Floods now during spring tide
![Page 20: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/20.jpg)
Local ConsiderationsPlanning
OperationsInfrastructure
Conservation
Union Studio Architects
![Page 21: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/21.jpg)
www.beachsamp.orghttp://seagrant.gso.uri.edu/climate/habitat.html
Work Underway…
![Page 22: R. Hancock](https://reader034.vdocuments.site/reader034/viewer/2022050909/56814b6c550346895db859f4/html5/thumbnails/22.jpg)
Questions?