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Article

Mitigating Erosional Effects Induced by Boat Wakes with Living Shorelines

1
Engineering School of Sustainable Infrastructure and Environment, University of Florida, Gainesville, FL 32611, USA
2
Guana Tolomato Matanzas National Estuarine Research Reserve, Ponte Vedra Beach, FL 32082, USA
*
Author to whom correspondence should be addressed.
Sustainability 2018, 10(2), 436; https://doi.org/10.3390/su10020436
Received: 10 December 2017 / Revised: 20 January 2018 / Accepted: 31 January 2018 / Published: 7 February 2018
Estuarine environments worldwide are among the most threatened habitats due to increased disturbances resulting from coastal infrastructure and rising population densities. Boating activity is a primary disturbance, as it induces biological stress and morphological changes along the coastline. This high-energy environment that boat wakes create has resulted in loss of surrounding oyster reefs and salt marsh vegetation, ultimately leading to shoreline and habitat erosion. Here, we characterize the boat wake climate in the Intracoastal Waterway, assess the bathymetry in this heavily trafficked area, and anticipate the effects of experimental living shorelines (natural breakwall and oyster restoration structures) on facilitating sediment deposition and slowing vegetation retreat. Field observations indicate that boat wakes suspend nearshore sediment and can reach heights greater than 40 cm. A numerical stability model of the breakwalls suggests that the optimal porosity is field-specific. The desired porosity for minimizing lateral displacement is 0.50, while it is 0.18 for maximum energy dissipation, which indicates a need to further investigate this complex problem. These findings demonstrate that boat wakes significantly and regularly disturb estuarine shorelines and may be altering their bathymetry as well as suggest that the design of the breakwalls may be optimized to best counteract this pervasive disturbance. View Full-Text
Keywords: oyster restoration; porous breakwalls; intracoastal waterway oyster restoration; porous breakwalls; intracoastal waterway
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MDPI and ACS Style

Herbert, D.; Astrom, E.; Bersoza, A.C.; Batzer, A.; McGovern, P.; Angelini, C.; Wasman, S.; Dix, N.; Sheremet, A. Mitigating Erosional Effects Induced by Boat Wakes with Living Shorelines. Sustainability 2018, 10, 436. https://doi.org/10.3390/su10020436

AMA Style

Herbert D, Astrom E, Bersoza AC, Batzer A, McGovern P, Angelini C, Wasman S, Dix N, Sheremet A. Mitigating Erosional Effects Induced by Boat Wakes with Living Shorelines. Sustainability. 2018; 10(2):436. https://doi.org/10.3390/su10020436

Chicago/Turabian Style

Herbert, Deidre, Emily Astrom, Ada C. Bersoza, Audrey Batzer, Patrick McGovern, Christine Angelini, Scott Wasman, Nicole Dix, and Alex Sheremet. 2018. "Mitigating Erosional Effects Induced by Boat Wakes with Living Shorelines" Sustainability 10, no. 2: 436. https://doi.org/10.3390/su10020436

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