Coastal Wetland Adaptation Strategies
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This document summarizes coastal wetland adaptation strategies presented at two municipal workshops in October 2014. The strategies included upland actions like facilitating marsh migration and removing barriers, as well as in-marsh actions like drainage improvements, elevation enhancement, and erosion control. Specific project examples were provided from locations around Rhode Island where marsh migration was being facilitated or impeded, and adaptation techniques like creek excavation and land protection were undertaken. Partnerships between municipalities, land trusts, and state agencies were noted as important for implementing projects costing $5,000 to $15,000 each to adapt coastal marshes to sea level rise.
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Coastal Wetland Adaptation Strategies
- 1. Coastal Wetland Adaptation Strategies SLAMM Municipal Workshops October 28th and 30th, 2014 Caitlin Chaffee Wenley Ferguson
- 2. Adaptation Strategies • Upland – Adopt activities that facilitate marsh migration – Change/move land use activities that inhibit marsh migration – Remove physical barriers • In-Marsh – Drainage improvements (small creek excavation) – Elevation enhancement – Erosion control along marsh edge
- 3. Winnapaug Pond Marsh, Westerly Marsh migration occurring yet impounded water creating mosquito breeding habitat
- 4. Palmer River Marsh, Barrington
- 5. Round Marsh, Jamestown Old farm path impediment to marsh migration into red maple swamp Marsh migrating into field
- 7. Bike path in marsh area Colt State Park, Bristol Mowed marsh area 1995
- 8. Colt State Park, Bristol Marsh after path moved 1996: marsh mowed Bike path relocated in late 1990s and “mow line” moved inland
- 9. 1 2 Opportunity to move mow line inland to allow wetland forming behind beach to migrate inland Seapowet Point, Tiverton 1 2
- 10. Allins Cove, Barrington Marsh restoration area Eroded bank at base of Byway Rd
- 13. Mill Cove Road, Warwick
- 14. Mill Cove Road, Warwick
- 15. Clark Road, Kickemuit River, Warren Marsh at end of road Road removal area
- 22. Atlantic Ave., Westerly, Winnapaug Pond Proposed sediment forebay, filter strip and check dams
- 23. Barrington Community Garden Marsh migration occurring
- 24. Jamiel Park, Warren Tidal creek under Market St Potential area for marsh migration if vehicular access changed to Wood Street
- 25. Kickemuit River adaptation opportunities Kickemuit Reservoir Dam: vulnerable to storm surge; future site for marsh migration
- 26. 1 Potential area to limit vehicular access 2 Edgewater Drive, Apponaug Cove, Warwick Flooding during a moon tide 1 Ponded water at low tide 2
- 27. Coldwell Street, Warwick Land protection of small lots required for low lying road to be closed to vehicle access
- 28. In marsh adaptation • Small creeks and runnels excavation – Partners include: municipalities, land trusts, Save The Bay and RIDEM Mosquito Abatement Program – STB provides project design development, permit preparation, organization of volunteers for “dig days”, and restoration monitoring – RIDEM provides low ground pressure equipment and operator if necessary – CRMC Habitat Fund and NRCS has provided funding – Projects range from $5,000 to $15,000
- 29. Gooseneck Cove adaptive management Small creeks dug to drain impounded water 2010 2012
- 32. Winnapaug Marsh adaptation project
- 33. Thank You