Bellport mar 23_2013
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Transcript of Bellport mar 23_2013
The New Inlet and its Evolution since SandyCharles Flagg, Research ProfessorStony Brook University
Roger Flood, ProfessorRobert Wilson, Assoc. ProfessorDong-Ming Yang, Graduate Student
Rich Giannotti, PilotDon Richards, PilotRich Weissmann, PhotographerMike Ferigno, PhotographerJustin Flagg, PhotographerBrian Wasser, Photographer
http://po.msrc.sunysb.edu/GSB
April 9, 2005
C. Flagg
November 3, 2012 ~0900 EDT (~1300 GMT)
C. Flagg and R. Giannotti
Nov 11
Nov 29
Jan 6Courtesy of Patti Rafferty, NPS
Nov 3
Nov 11
Nov 18
Nov 29
Dec 20
Jan 6
January 27, 2013
February 2, 2013
February 14, 2013
March 10, 2013
Shoreline Analysis by the National Park Service
Courtesy of Patti Rafferty, NPS
C. Flagg and R. Giannotti
Oblique Aerial Photo taken on Sunday March 10
December 7, 2012 March 17, 2013
Hi-Tech Bathymetric Surveying TechniqueRTK GPS
Fathometer
Courtesy of P. Rafferty, NPS
February 22 Bathymetric Survey of the inlet
Roger FloodSoMAS, Stony Brook Univ.
Bottom Profiles at Northern End of Inlet
Great South Bay Observatory
Funded by New York Department of State
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
Great South Bay Buoy #1Deployed ~2 mi south of Sayville
Pre-inlet responses of the ocean and eastern bay to strong winds
mean water level
Low salinity riverwaters enter the bay
Bay waters flowup river
Waves scourthe beach
High waves can over-top the dunes
Before Hurricane Sandy After Hurricane Sandy
Amplitude, m Phase, Deg Amplitude, m Phase, Deg
Bellport 0.16 102.8 0.16 93.8Barrett Beach 0.15 100.3 0.15 99.0Fire Island Inlet
0.23 11.7 0.22 12.4
Tanner Park 0.20 63.1 0.19 62.6
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
Amplitude is ½ the tide range
USGS tide gaugeat Lindenhurst
Woods Hole
BellportLindehurst
Atlantic City
Chesapeake Bay
We have seen Wide Spread Sea Level Fluctuations
What Happens in Great South Bay is Often the Result of Ocean Forcing
Comparison of Previous Winter Water Level Fluctuations
Sandy
Bellport Bay Nitrogen Loaddata from 2010 thru 2012
Post Sandy
Data courtesy of theSuffolk County Department of Health Services
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.