Coastal Systems International, Inc. conducted a
detailed analysis on the long period wave oscillations
within the Emerald Bay Marina. The Emerald Bay Marina
is located in the island of Great Exuma, Bahamas and is
a 45-acre deepwater facility that is equipped to accommodate
vessels up to 200 feet. Since the marina opened, seiching
has been reported. Seiching is the phenomenon of long
period wave oscillations within a marina basin, which
can result in frequent broken mooring lines and an overall
inconvenience for boaters.
Coastal Systems was hired to
conduct an analysis of the existing marina using the
Hydraulic Institute's (DHI) numerical wave modeling software.
In order to determine the governing factors of seiching
and the location of seiching "hot spots", comprehensive
post-processing of the modeling results was conducted.
This included statistical analysis, low and high pass
filtering, and wave spectra analysis. Based on the results,
recommendations were provided on the marina configuration
to minimize long period wave oscillations and to improve
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