a. Characterize incident wave climate from available sources.
b. Develop numerical wave model CGWAVE application to cover study
areas.
c. Use the numerical model to investigate alternative harbor sites.
Wave information around the Samoa Islands is very limited. For this study,
wind wave and swell climate was characterized with information from Kinhill,
Riedel & Byrne (1992). Key sources were nondirectional buoy data from the
south side of Western Samoa and a 5-year hindcast for deep water, open ocean in
the same general area. Wave climate information is presented in Chapter 2.
Numerical wave model CGWAVE, the present state-of-the-art CHL model
for harbor wave response studies, was set up to cover the entire Pago Pago
Harbor embayment and an area seaward of the entrance extending beyond shoal
areas to relatively deep water. Existing bathymetry was used. Four alternative
sites were considered (Figure 3). Development of the numerical model
application and test procedures are described in Chapter 3.
Response of the alternative sites to wind waves and swell (short waves) is
presented in Chapter 4. Harbor oscillation characteristics (response to long
waves) are presented in Chapter 5. For both short and long waves, the harbor
response is related to wave climate and to relevant operational criteria at
commercial piers.
Conclusions and recommendations are given in Chapter 6. This chapter is
followed by references.
3
Chapter 1 Introduction
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