The Structure 2 configuration was similar to that of Structure 1, but in place
of the shore-parallel breakwater, it contained one dogleg jetty with the inner
segment perpendicular to the shore (Figure 7). A total of six experimental
conditions were studied, as noted in Table 2. For an incident wave direction of
0.0 deg, irregular waves of 0.8 sec, 6.1 cm (0.2 ft), and 1.6 sec, 4.6 cm (0.15 ft),
and monochromatic waves of 0.8 sec, 4.6 cm (0.15 ft), were produced. The wave
generator was repositioned for a 20-deg incident wave direction and the same
three wave conditions were repeated. The 20-deg angle was oriented such that
less energy would be propagated behind the breakwater.
The tables in Appendix D contain gauge number, depth at the gauge, average
water surface elevation relative to the still-water level, significant wave period,
significant wave height, average wave height, and maximum wave height. The
data are in tables for each gauge arrangement, as shown and noted in Figure 8.
Appendix E presents contoured dimensional wave height plots. Figure 16 shows
the 0.8-sec wave experiment wave-height contours and wave direction from the
velocity gauges. The x-y arrows in the plots indicate the basin x-y position that
corresponds to the plot origin (0.0). Appendix J contains sample spectral energy
density versus frequency plots for selected wave gauge locations. The overall
basin bathymetry, the shore-parallel breakwater structure, the dogleg jetty
structure, and the parallel jetties structure are referenced in Appendix K. Due to
the large volume of data, it has been placed on the accompanying CD. The
location of wave gauges and the dogleg jetty within the coordinate system is
given in Appendix M.
Chapter 4 Physical Model Results