Revetment Design at Sumay Cove, Guam
Sea Engineering, as part of the design-build team of Wilson Okamoto Corp. and Bulltrack-Watts JV, designed a revetment along approximately 270 feet of shoreline at the headland between Sumay Cove and Clipper Cove in Apra Harbor, Guam. Work included:
- Review of existing available information concerning extreme wave conditions near Apra Harbor
- Implementation of a finite element numerical model to calculate the transformation and transmission of waves to the project site at Sumay Cove
- Analysis of oceanographic design criteria
- Preparation of a basis of design report
The CGWAVE numerical model contained in the Surface water Modeling System was used for this analysis. CGWAVE is a finite element model that employs the Mild Slope Equation to simulate wave characteristics in nearshore environments. Model cases were run for 2, 5, 10, 25, and 50-year return period wave heights. A riprap revetment concept plan was developed for the site based on the model results.