Analysis of Pervious Oyster Shell Habitat (POSH) Unit Effectiveness Using Computational Fluid Dynamics (CFD) and Field Observations
Publication: Geo-Congress 2023
ABSTRACT
Pervious oyster shell habitat (POSH) units are a novel method for oyster reef restoration and shoreline protection. POSH units have a similar function to traditional reef balls but are constructed from recycled oyster shells and cement. So far, POSH units have been deployed at multiple sites in Northeast Florida, including Kingsley Plantation, which is part of the Timucuan Ecological and Historic Preserve. The function of the POSH units at the Kingsley Plantation research site is to promote oyster growth/recruitment and attenuate wave energy from boat wakes in effort to mitigate shoreline erosion. The purpose of this study was to utilize computational fluid dynamics (CFD), specifically Siemens’ STAR-CCM+, to examine the effectiveness of the POSH units at reducing shoreline bed stress at the research site. A model with a single POSH unit was created and run under two wave scenarios. Results indicated that a single POSH unit may reduce bed stress, but this reduction is likely minimal. However, secondary effects that may influence shoreline erosion were also observed. These effects will be explored in future research. In addition, the CFD procedure outlined in this study may be used with multiple POSH unit configurations in the future to assess overall effectiveness.
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Geo-Congress 2023
Pages: 35 - 44
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Published online: Mar 23, 2023
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