Earth and Planetary Sciences
8 years ago

Seawalls impact beach erosion and sediment transport, altering coastal landscapes.

Coastal Engineering
An analytic model for the prediction of wave setup, longshore currents and sediment transport on beaches with seawalls
Peter Ruggiero, William G. McDougal

Paper Summary

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A model was created to predict wave behavior and sediment movement on beaches with seawalls. The model considers shallow water, small wave angles, and spilling breakers. It shows that seawalls can affect wave setup, currents, and sediment transport. The presence of a seawall can change the slope of the beach and impact sediment movement. The location of the seawall along the beach can also influence the strength of longshore currents and sediment transport. The findings help explain conflicting information in previous studies about seawalls on beaches.