IMPLEMENTATON OF A REGIONAL WAVE MEASUREMENT AND
MODELING SYSTEM, SOUTH SHORE OF LONG ISLAND, NEW YORK
William G. Grosskopf1, Nicholas C. Kraus2, Adele Militello3, Lynn M. Bocamazo4
ABSTRACT: This paper describes the wave measurement and numerical
modeling components of a regional monitoring and modeling system
established for the south shore of Long Island, New York. The monitoring
portion was begun in April 1998 and has produced a wealth of data on waves,
currents, water level, and soundings at inlets. A directional spectral wave
model incorporating nested grids with fine resolution at inlets provides an
efficient and accurate means of calculating nearshore waves. Validation of the
modeling system is presented, together with discussion of the managerial
functions of the data and model.
The south shore of Long Island extends 184 km from Montauk Point on the east to
Norton Point, which is west of Coney Island, Brooklyn. This coastal reach contains six
permanent inlets, and representative average annual dredging requirements in cubic meters
for the inlets, listing from east to west, are: Shinnecock 100,000; Moriches (recently)
100,000; Fire Island 500,000; Jones 100,000; East Rockaway 200,000; and
Rockaway/Jamaica Bay 125,000. Rosati, Gravens, and Smith (1999) describe historic
and recent sediment budgets for this coast, and Morang, Rahoy, and Grosskopf (1999)
discuss the regional nearshore geology.
Both the U.S. Army Corps of Engineers' New York District and the State of New York
have as an objective regional sediment management for the south shore, which would
1) Offshore & Coastal Technologies, Inc. East Coast, P.O. Box 1368, Chadds Ford, PA
2) U.S. Army Engineer Research and Development Center, Coastal and Hydraulics Laboratory,
3909 Halls Ferry Road, Vicksburg, MS 39180-6199. Nicholas.C.Kraus@erdc.usace.army.mil.
3) Coastal Analysis, LLC, 4886 Herron Road, Eureka, CA 95503. CoastalAnalysis@home.com.
4) U.S. Army Engineer District, New York, 26 Federal Plaza, New York, NY 10278-0090.