This annual report documents the collection of shoreline position
data and describes the short- term variation that has occurred
during the period from Spring 2010 to Spring 2011 for the Fire
Island barrier island, including elements of the Fire Island
National Seashore, as called for in the Northeast Coastal and
Barrier Network's protocol on shoreline monitoring (Psuty, et al.,
2010). The changes in shoreline position are generally descriptive
of the seasonal contrasts (lower energetics in the summer period
versus higher energetics in the winter period) that support
sediment accumulation during summer and erosion during the winter.
However, there are many natural variables and cultural events that
affect the gains and losses of sediment and the displacements of
the beach. The 1-D shoreline surveys were conducted in April 2010,
September 2010, and May 2011. Most of the communities had a net
negative shoreline displacement (mean of -13.71 m) for the year.
Some of the County Park had a net annual negative shoreline
displacement of -13.80 m. The NPS land had a net annual inland
displacement of -12.04 m, whereas most of the State Park shifted
inland -9.12 m. The mean shoreline position change for the annual
period, Spring 2010 to Spring 2011, for the entire island was an
inland displacement of -12.62 m.
General
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