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Coastal Geologic Hazards and Sea-Level Rise: Climate Change in Rhode Island
The document discusses coastal geologic hazards and the impact of sea-level rise in Rhode Island, highlighting that storms are the primary drivers of coastal change, with sea-level rise as a significant secondary concern. It outlines the need for better management practices to address erosion and flooding risks, especially in light of projected rises of 3-5 feet by 2100. Key points include concerns about the effects of past and future extreme weather events, the dynamics of sediment transport, and requisite planning efforts to mitigate these issues.
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Coastal Geologic Hazards and Sea-Level Rise: Climate Change in Rhode Island
- 1. COASTAL GEOLOGIC HAZARDS AND SEA-LEVEL RISE: CLIMATE CHANGE IN RHODE ISLAND Shoreline Change SAMP Stakeholders Meeting 4 April 2013 Jon C. Boothroyd1,2and Bryan A. Oakley3 (1) Rhode Island Geological Survey (2) Department of Geosciences, University of Rhode Island, Kingston RI 02881 (3) Environmental Earth Science Department, Eastern Connecticut State University, Willimantic, CT 06226
- 2. Summary for RhodeIsland: • Glacial Geology, Past and Present, the Underlying Key to Understanding Processes and Products • Storms the Most Important Driver in Coastal Change Sea-Level Rise a Secondary Effect • Shoreface Sediment Transport Not Well Understood at Present • Future Major Storms Combined With Sea-Level Rise a Very Large Problem • Accelerated Sea-Level Rise Resulting in Inundation also a Very Large Potential Problem • RICRMC Planning for a 3-5 foot Rise by 2100 and a 1.5 foot Rise by 2050
- 3. S New England,E New York, Continental Shelf at LGM ~ 26,000 yBP You are here RI Map Generated By: BA Oakley and JC Boothroyd
- 4. Eustatic Sea-Level Rise + Isostatic Rebound Isostatic Rebound at Laurentide Block Island Ice Sheet? Laurentide 2m.100yr-1 Ice Sheet? RI Relative 2m.100yr-1 Sea Level Antarctic Ice Sheet? Eustatic 2-5m.100yr-1 Sea Level Explanation Oakley and Boothroyd, July 2012
- 5. Geomorphology of Southeastern New England
- 6. Narragansett Pier, RISeawall – Tropical Storm Irene 2011 Storms are the Driver Anonymous via N Vinhateiro, 28 aug 2011
- 7. Frontal Erosion -Browning Cottages BA Oakley
- 8. Superstorm Sandy -Browning Cottages 30 Oct 2012 http://fema.maps.arcgis.com/home/webmap/viewer.html?webmap=
- 9. Superstorm Sandy -Browning Cottages 31 Oct 2012
- 10. Frontal Erosion 1939-2012- Browning Cottages, Moonstone Beach, RI House 2012 moved to Upland 1951
- 11. Shoreface – InnerShelf Deposition Block Island Sound Offshore Movement of Sand
- 12. Sandy Geologic Summary: •Sandy a Tropical – Extratropical Hybrid • Significant Wave Height 31 feet at Inner Shelf Buoy; Max Recorded Wave Height 47 feet • RI Received a Glancing Blow ; But Public Misconception by Some Believe it a 100 Year Event • Greatest Geologic Change and Infrastructure Damage Since Hurricane Carol, 1954 • Washover Fan Deposition an Underestimated Problem • Shoreline Change Special Area Management Plan Needed to Better Prepare for Next Event – Already Started
- 13. Superstorm Sandy –Tropical-Extratropical Hybrid 29 October 2012 Newport Tide Gauge SET UP PREDICTED http://tidesandcurrents.noaa.gov/ STORM SURGE data_menu.shtml?stn=8452660%20Newport,%20RI&type=Tide+Data
- 14. How High Maximum Water Level was the 9.46 Feet, 2.88 meters Above MHHW Water ? Boothroyd and Carol Water Level Hehre 2008 Why above MHHW? Sandy Water Level Water 4.25 Feet, 1.30 meters Levels Above MHHW Newport, RI MHHW = 3.85 ft, 1.173 m Adapted from: www.ngs.noaa.gov/newsy s-cgi- MLLW = 0.0 ft, 0.0 m bin/ngs_opsd.prl?PID=LW 0493&EPOCH=1983-2001
- 15. Frequency? Next Month or Next Year Superstorm Sandy Oct 2012 Tropical Storm Irene Aug 2011 Hurricane Bob Aug 1991 Adapted from NOAA; USACE 1988; Hehre 2007
- 16. Measuring Shore Transectswith: “2 Sticks and A String” or, the Modified Emery Method -22cm Eric Woodward 12 Oct 2012
- 17. Cha-Ez Profile -Charlestown Barrier - Post Sandy Washover Fan Deposition S McCandless 30 Oct 2012
- 18. Post Sandy Pre-Sandy FEMA Dune Erosion Protocol
- 19. Charlestown Beach –Blizzard 1978 – No Berm JC Boothroyd
- 20. Post Sandy Blizzard 1978
- 21. Elevation Washover Fan Deposition Difference – USACE Post Sandy and 2011 USGS LiDAR DEMs Charlestown Barrier Foredune Removal Cha-Ez Profile DRAFT FIGURE – PRELIMINARY RESULTS
- 22. Pre-Sandy – QuonochontaugBarrier Conservation Land Washover Fan Deposition Bousquet and Son – Aerial Views
- 23. Post-Sandy – Quonochontaug Barrier Conservation Land Washover Fan Deposition Bousquet and Son – Aerial Views
- 24. A General CoastalBarrier Model for Rhode Island Very Transgressive
- 25. Napatree Barrier –Westerly, RI Little Narragansett Bay Watch Hill Hehre and Boothroyd, 2007
- 26. Napatree Barrier –Shoreline Change Map 2004 – Sound Side 1939 – Sound Side -71.6m 1939 – 2004 – Ocean Side Ocean Side Hehre and Boothroyd, 2007
- 27. Washover Fan Deposition Misquamicut Barrier - Westerly Atlantic Ave Washover Fan RI DOT 30 Oct 2012
- 28. Charlestown Beach, RI– Hurricane Bob 1991 Washover Fan Deposition Removal is a Bad Idea ……. Barriers Naturally Retreat Aug 1991 Landward and Upward JC Boothroyd
- 29. Deposition and Damage MisquamicutHeadland - Westerly Washover Fan Andrea MSQ - And Hotel Profile RI DOT 30 Oct 2012
- 30. Misquamicut Andrea Hotel Shoreline “Protection” Structure – Late 1950s to Early 1960s 1957 Ford Providence Journal?
- 31. Andrea Hotel -Misquamicut Headland - Westerly The Managed Retreat Begins Frieda Squires, Providence Journal 10 mar 2013
- 32. The Fate ofWashover Fans – Misquamicut State Beach And Hopefully, the Exercise of Scott Rasmussen Scientific Rationale for Replenishment 15 Feb 2013
- 33. A Very BriefLook at Climate Change and the Future Shore Zone of Rhode Island
- 34. Co2now.org 394.37 www.350.org http://www.esrl.noaa.gov/gmd/ccgg/trends/co2_data_mlo.html
- 35. HEIGHT NOW Adapted from: http://tidesandcurrents.noaa.gov/sltrends/ sltrends_station.shtml?stnid=8452660%20Newport,%20RI Boothroyd 2012
- 36. 6.1 ft 185 cm VR Max 4.5 ft VR A1F1 137 cm VR B1 100 cm Height above NOW 1.4 ft 41 2050
- 37. Ninigret – GreenHill Lagoons 2003 – 2004 Orthophoto Today
- 38. Ninigret – GreenHill Lagoons 2100 Inundation – 5 ft 200 ft Barrier Migration Projected
- 39. Ninigret – GreenHill Lagoons 2100 Inundation – 5 ft + 1938 Hurricane Surge Event Projected
- 40. South Kingstown, RI– Town Beach An Eroding Glacial Bluff Shore BA Oakley
- 41. South Kingstown, RI– Town Beach An Eroding Glacial Bluff Shore Boardwalk Pilings RI DOT 30 Oct 2012
- 42. Headland Erosion –Glacial Stratified Bluff 28m
- 43. Matunuck Headland, SKingstown Shoreline Change 1951 - 2012 Projected Change 2012 - 2050 2050 2012 1951
- 44.