Submerged Narrow-Crested Breakwaters
687
Figure 2. (a) Diagram of Beachsaver Reef unit (after Herrington and Bruno, 1998), (b) photo of unit, and (c) placement of unit at Avalon, New Jersey.
227 is the demonstration of prototype-scale ``innovative'' or
monitoring program is presented identifying the areas and
``non-traditional'' methods of shoreline erosion control. Stud-
timeframe data was collected. Each program varied slightly,
ies under this program are investigating recent approaches
however, data was gathered through measurements of beach
in shoreline erosion control technologies. This review of the
profile surveys, settlement of the units, scour at the base, and
use of concrete prefabricated breakwater units is being in-
wave height reduction and structure induced currents to
vestigated as one of these technologies.
some degree for all projects. Monitoring results are presented
The following section provides a detailed account of the six
in terms of shoreline response, sediment volume change, set-
submerged breakwater projects and the findings. A brief in-
tlement, scour, wave attenuation, and current measure-
troduction to each project is given describing the area of
ments. Lastly, a discussion of the performance is provided
placement and configuration. Second, an overview of the
that characterizes the validity and outcome of each project.
Journal of Coastal Research, Vol. 19, No. 3, 2003
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