Bellport mar 23_2013


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Prof Flagg's Presentation on The Breach, Bellport March 23rd, 2013

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Bellport mar 23_2013

  1. 1. The New Inlet and its Evolution since Sandy Charles Flagg, Research Professor Stony Brook University Roger Flood, Professor Robert Wilson, Assoc. Professor Dong-Ming Yang, Graduate Student Rich Giannotti, Pilot Don Richards, Pilot Rich Weissmann, Photographer Mike Ferigno, Photographer Justin Flagg, Photographer Brian Wasser, Photographer
  2. 2. April 9, 2005 C. Flagg
  3. 3. November 3, 2012 ~0900 EDT (~1300 GMT) C. Flagg and R. Giannotti
  4. 4. Nov 3 Nov 11 Nov 11 Nov 29 Nov 18 Courtesy of Patti Rafferty, NPS Jan 6
  5. 5. Nov 29 Dec 20 Jan 6
  6. 6. January 27, 2013
  7. 7. February 2, 2013
  8. 8. February 14, 2013
  9. 9. March 10, 2013
  10. 10. Shoreline Analysis by the National Park Service Courtesy of Patti Rafferty, NPS
  11. 11. Oblique Aerial Photo taken on Sunday March 10 C. Flagg and R. Giannotti
  12. 12. Hi-Tech Bathymetric Surveying Technique RTK GPS December 7, 2012 Fathometer March 17, 2013
  13. 13. Courtesy of P. Rafferty, NPS
  14. 14. February 22 Bathymetric Survey of the inlet Roger Flood SoMAS, Stony Brook Univ.
  15. 15. Bottom Profiles at Northern End of Inlet
  16. 16. Great South Bay Observatory Funded by New York Department of State
  17. 17. Sensors deployed at the Bellport marina since 2004 Sea Bird Electronics “SeaCat”, SBE 16 and SBE 16Plus Temperature and salinity Temperature, salinity, sea Level, chlorophyll and turbidity
  18. 18. Great South Bay Buoy #1 Deployed ~2 mi south of Sayville
  19. 19. Pre-inlet responses of the ocean and eastern bay to strong winds High waves can over-top the dunes Low salinity river waters enter the bay mean water level Waves scour the beach Bay waters flow up river
  20. 20. Tides Before and After Hurricane Sandy and the opening of the Breach at Old Inlet Amplitude and Phase of the M2 tidal constituent, 12.42 hour period Before Hurricane Sandy After Hurricane Sandy Amplitude, m Phase, Deg Amplitude, m Phase, Deg Bellport 0.16 102.8 0.16 93.8 Barrett Beach 0.15 100.3 0.15 99.0 Fire Island Inlet 0.23 11.7 0.22 12.4 Tanner Park 0.20 63.1 0.19 62.6 Amplitude is ½ the tide range
  21. 21. USGS tide gauge at Lindenhurst
  22. 22. We have seen Wide Spread Sea Level Fluctuations Woods Hole Bellport Lindehurst Atlantic City Chesapeake Bay
  23. 23. What Happens in Great South Bay is Often the Result of Ocean Forcing
  24. 24. Comparison of Previous Winter Water Level Fluctuations Sandy
  25. 25. Bellport Bay Nitrogen Load data from 2010 thru 2012 Post Sandy Data courtesy of the Suffolk County Department of Health Services
  26. 26. The New Inlet is a dynamic system that responds to tides, storm surges and ocean waves, and it will continue to evolve. As part of this evolution, the inlet will continue to move west. Although the inlet has increased in size since it was formed, it is uncertain whether this trend will continue as we move into the summer period with milder weather when sand typically is deposited on the beach. The inlet is relatively small compared to the other inlets and this is reflected in the lack of change in the tide range at Bellport and the Great South Bay in general. There is an increased exchange of waters with the ocean in the eastern Great South Bay and this will undoubtedly improve the water quality of the area. We have experienced unusually frequent storms over the past months which have caused repeated local flooding through a combination of ocean and local Bay response to winds. The Bay closely matches low-frequency ocean sea level changes and the existence of the new inlet has little to no impact on the Bay’s response.