Shoreline Response to Breakwaters with Time-Dependent Wave Transmission
ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
Pagination or Media Count:
Wave transmission is a leading parameter determining the response of the shoreline to a detached breakwater, reef, or spur attached to a jetty. To improve the predictive capability of the shoreline response numerical model GENESIS, published empirical formulas for the wave transmission coefficient were incorporated to calculate time-dependent wave transmission and shoreline response. Simulations for different structural configurations, wave climates, and water levels demonstrate the functional utility of time-dependent wave transmission on shoreline response predictions. Results indicate that variable wave transmission is of significance for modeling the response of the beach to submerged and emergent near-surface structures. Predictions of the model are examined in application to a functional design of a submerged spur being studied as a possible sediment-control measure for the north jetty at Grays Harbor, WA. Results show that for design applications, beach response under time-varying forcing cannot be anticipated with a constant transmission coefficient. The improved capability is expected to have wide applicability.
- Physical and Dynamic Oceanography
- Hydrology, Limnology and Potamology
- Civil Engineering