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COASTAL GEOLOGIC HAZARDS          AND SEA-LEVEL RISE:    CLIMATE CHANGE IN RHODE ISLAND       Shoreline Change SAMP Stakeh...
Summary for Rhode Island:• Glacial Geology, Past and Present,  the Underlying Key to Understanding Processes and  Products...
S New England, E New York, Continental Shelf at LGM ~ 26,000 yBP                             You are                      ...
Eustatic Sea-Level   Rise     +                   Isostatic                         Rebound Isostatic Rebound     at      ...
Geomorphology      of Southeastern New England
Narragansett Pier, RI Seawall – Tropical Storm Irene 2011Storms are the Driver                              Anonymous via ...
Frontal Erosion - Browning Cottages                                      BA Oakley
Superstorm Sandy - Browning Cottages                                                              30 Oct 2012             ...
Superstorm Sandy - Browning Cottages                                  31 Oct 2012
Frontal Erosion 1939-2012 -Browning Cottages, Moonstone Beach, RI House                         2012moved to Upland       ...
Shoreface – Inner Shelf Deposition        Block Island Sound Offshore Movement of Sand
Sandy Geologic Summary:• Sandy a Tropical – Extratropical Hybrid• Significant Wave Height 31 feet at Inner Shelf Buoy;  Ma...
Superstorm Sandy – Tropical-Extratropical Hybrid              29 October 2012             Newport Tide Gauge              ...
How High      Maximum Water Level was the              9.46 Feet, 2.88 meters                          Above MHHW Water ? ...
Frequency?    Next Month or      Next Year                 Superstorm Sandy                     Oct 2012Tropical StormIren...
Measuring Shore Transects with:“2 Sticks and A String” or, the Modified Emery Method                                      ...
Cha-Ez Profile - Charlestown Barrier - Post Sandy                  Washover Fan                   Deposition              ...
PostSandy        Pre-Sandy FEMA Dune  Erosion  Protocol
Charlestown Beach – Blizzard 1978 – No Berm                                        JC Boothroyd
PostSandy        Blizzard         1978
Elevation          Washover Fan                       Deposition  Difference –  USACE Post Sandy and 2011  USGS LiDAR     ...
Pre-Sandy – Quonochontaug Barrier         Conservation Land Washover Fan  Deposition                             Bousquet ...
Post-Sandy –Quonochontaug Barrier   Conservation LandWashover Fan Deposition                        Bousquet and Son – Aer...
A General Coastal Barrier Model for Rhode Island                Very Transgressive
Napatree Barrier – Westerly, RI                         Little Narragansett Bay                                           ...
Napatree Barrier – Shoreline Change Map                        2004 – Sound Side    1939 – Sound Side                   -7...
Washover Fan Deposition  Misquamicut Barrier - Westerly               Atlantic AveWashover Fan                            ...
Charlestown Beach, RI – Hurricane Bob 1991Washover Fan Deposition   Removal is a Bad Idea …….    Barriers Naturally Retrea...
Deposition and DamageMisquamicut Headland - Westerly    Washover Fan  Andrea                       MSQ - And   Hotel      ...
Misquamicut          Andrea                       Hotel   Shoreline “Protection”  Structure – Late 1950s to  Early 1960s  ...
Andrea Hotel - Misquamicut Headland - WesterlyThe Managed Retreat Begins                        Frieda Squires, Providence...
The Fate of Washover Fans –  Misquamicut State Beach    And Hopefully, the Exercise of                                    ...
A Very Brief Look        at Climate Change     and theFuture Shore Zone        of  Rhode Island
Co2now.org 394.37    www.350.orghttp://www.esrl.noaa.gov/gmd/ccgg/trends/co2_data_mlo.html
HEIGHT NOW                      Adapted from:        http://tidesandcurrents.noaa.gov/sltrends/sltrends_station.shtml?stni...
6.1 ft                                      185 cm                                   VR Max4.5 ft                       VR...
Ninigret – Green Hill Lagoons2003 – 2004 Orthophoto Today
Ninigret – Green Hill Lagoons 2100 Inundation – 5 ft200 ft Barrier Migration  Projected
Ninigret – Green Hill Lagoons    2100 Inundation – 5 ft+ 1938 Hurricane Surge Event Projected
South Kingstown, RI – Town Beach    An Eroding Glacial Bluff Shore                                     BA Oakley
South Kingstown, RI – Town Beach    An Eroding Glacial Bluff Shore  Boardwalk   Pilings                                   ...
Headland Erosion – Glacial Stratified Bluff         28m
Matunuck Headland, S Kingstown     Shoreline Change 1951 - 2012Projected Change   2012 - 2050                      2050   ...
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Coastal Geologic Hazards and Sea-Level Rise: Climate Change in Rhode Island

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Coastal Geologic Hazards and Sea-Level Rise: Climate Change in Rhode Island

This presentation was given at the Shoreline Change SAMP Stakeholder Meeting on April 4th, 2013 by Jon C. Boothroyd (Rhode Island Geological Survey and Department of Geosciences, University of Rhode Island) and Bryan A. Oakley (Environmental Earth Science Department, Eastern Connecticut State University).

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Coastal Geologic Hazards and Sea-Level Rise: Climate Change in Rhode Island

  1. 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. 2. Summary for Rhode Island:• 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. 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. 4. Eustatic Sea-Level Rise + Isostatic Rebound Isostatic Rebound at LaurentideBlock 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 ExplanationOakley and Boothroyd, July 2012
  5. 5. Geomorphology of Southeastern New England
  6. 6. Narragansett Pier, RI Seawall – Tropical Storm Irene 2011Storms are the Driver Anonymous via N Vinhateiro, 28 aug 2011
  7. 7. Frontal Erosion - Browning Cottages BA Oakley
  8. 8. Superstorm Sandy - Browning Cottages 30 Oct 2012 http://fema.maps.arcgis.com/home/webmap/viewer.html?webmap=
  9. 9. Superstorm Sandy - Browning Cottages 31 Oct 2012
  10. 10. Frontal Erosion 1939-2012 -Browning Cottages, Moonstone Beach, RI House 2012moved to Upland 1951
  11. 11. Shoreface – Inner Shelf Deposition Block Island Sound Offshore Movement of Sand
  12. 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. 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. 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 MHHWNewport, 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. 15. Frequency? Next Month or Next Year Superstorm Sandy Oct 2012Tropical StormIrene Aug 2011 Hurricane Bob Aug 1991 Adapted from NOAA; USACE 1988; Hehre 2007
  16. 16. Measuring Shore Transects with:“2 Sticks and A String” or, the Modified Emery Method -22cm Eric Woodward 12 Oct 2012
  17. 17. Cha-Ez Profile - Charlestown Barrier - Post Sandy Washover Fan Deposition S McCandless 30 Oct 2012
  18. 18. PostSandy Pre-Sandy FEMA Dune Erosion Protocol
  19. 19. Charlestown Beach – Blizzard 1978 – No Berm JC Boothroyd
  20. 20. PostSandy Blizzard 1978
  21. 21. Elevation Washover Fan Deposition Difference – USACE Post Sandy and 2011 USGS LiDAR DEMs Charlestown Barrier Foredune Removal Cha-Ez ProfileDRAFT FIGURE –PRELIMINARY RESULTS
  22. 22. Pre-Sandy – Quonochontaug Barrier Conservation Land Washover Fan Deposition Bousquet and Son – Aerial Views
  23. 23. Post-Sandy –Quonochontaug Barrier Conservation LandWashover Fan Deposition Bousquet and Son – Aerial Views
  24. 24. A General Coastal Barrier Model for Rhode Island Very Transgressive
  25. 25. Napatree Barrier – Westerly, RI Little Narragansett Bay Watch Hill Hehre and Boothroyd, 2007
  26. 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. 27. Washover Fan Deposition Misquamicut Barrier - Westerly Atlantic AveWashover Fan RI DOT 30 Oct 2012
  28. 28. Charlestown Beach, RI – Hurricane Bob 1991Washover Fan Deposition Removal is a Bad Idea ……. Barriers Naturally Retreat Aug 1991 Landward and Upward JC Boothroyd
  29. 29. Deposition and DamageMisquamicut Headland - Westerly Washover Fan Andrea MSQ - And Hotel Profile RI DOT 30 Oct 2012
  30. 30. Misquamicut Andrea Hotel Shoreline “Protection” Structure – Late 1950s to Early 1960s 1957 FordProvidence Journal?
  31. 31. Andrea Hotel - Misquamicut Headland - WesterlyThe Managed Retreat Begins Frieda Squires, Providence Journal 10 mar 2013
  32. 32. The Fate of Washover Fans – Misquamicut State Beach And Hopefully, the Exercise of Scott RasmussenScientific Rationale for Replenishment 15 Feb 2013
  33. 33. A Very Brief Look at Climate Change and theFuture Shore Zone of Rhode Island
  34. 34. Co2now.org 394.37 www.350.orghttp://www.esrl.noaa.gov/gmd/ccgg/trends/co2_data_mlo.html
  35. 35. HEIGHT NOW Adapted from: http://tidesandcurrents.noaa.gov/sltrends/sltrends_station.shtml?stnid=8452660%20Newport,%20RI Boothroyd 2012
  36. 36. 6.1 ft 185 cm VR Max4.5 ft VR A1F1 137 cm VR B1 100 cm Height above NOW1.4 ft 41 2050
  37. 37. Ninigret – Green Hill Lagoons2003 – 2004 Orthophoto Today
  38. 38. Ninigret – Green Hill Lagoons 2100 Inundation – 5 ft200 ft Barrier Migration Projected
  39. 39. Ninigret – Green Hill Lagoons 2100 Inundation – 5 ft+ 1938 Hurricane Surge Event Projected
  40. 40. South Kingstown, RI – Town Beach An Eroding Glacial Bluff Shore BA Oakley
  41. 41. South Kingstown, RI – Town Beach An Eroding Glacial Bluff Shore Boardwalk Pilings RI DOT 30 Oct 2012
  42. 42. Headland Erosion – Glacial Stratified Bluff 28m
  43. 43. Matunuck Headland, S Kingstown Shoreline Change 1951 - 2012Projected Change 2012 - 2050 2050 2012 1951
  44. 44. End of Presentation

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