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Open AccessArticle

Hydrodynamic Drivers of Dissolved Oxygen Variability within a Tidal Creek in Myrtle Beach, South Carolina

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Department of Coastal and Marine Systems Science, Coastal Carolina University, Conway, SC 29528, USA
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Department of Marine Science, Coastal Carolina University, Conway, SC 29528, USA
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Author to whom correspondence should be addressed.
Water 2019, 11(8), 1723; https://doi.org/10.3390/w11081723
Received: 17 June 2019 / Revised: 14 August 2019 / Accepted: 15 August 2019 / Published: 19 August 2019
(This article belongs to the Section Water Quality and Ecosystems)
Beach erosion and water quality degradation have been observed in Singleton Swash, a tidal creek that traverses the beach-face connecting land and ocean in Myrtle Beach, SC. The objective of this study in Singleton Swash is to explore relationships between water quality and hydrodynamics, where the latter are influenced by beach face morphology. We measure water velocities, water levels, and dissolved oxygen concentrations (DO) (a proxy for water quality) and apply correlation analysis to examine the relationships between physical processes and dissolved oxygen variations. Results show that larger tidal ranges are associated with higher mean levels of DO in the tidal creek. The larger tidal ranges are linked to larger magnitude currents, which increase both the DO transport via larger fluxes of oxygenated oceanic water into the swash and the magnitude of Reynolds shear stresses; due to tidal asymmetries, flood currents are stronger than ebb currents in this system. Based on these results, it is concluded that the combined transport of oxygenated waters into the tidal creek from the ocean on large flood tides and subsequent mixing due to large Reynolds shear stresses result in the observed net DO concentration increases in the creek over tidal cycles. View Full-Text
Keywords: tidal creek hydrodynamics; dissolved oxygen; pressure measurements; acoustic Doppler velocimeter measurements; correlation analysis; Reynolds shear stress tidal creek hydrodynamics; dissolved oxygen; pressure measurements; acoustic Doppler velocimeter measurements; correlation analysis; Reynolds shear stress
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Pastore, D.M.; Peterson, R.N.; Fribance, D.B.; Viso, R.; Hackett, E.E. Hydrodynamic Drivers of Dissolved Oxygen Variability within a Tidal Creek in Myrtle Beach, South Carolina. Water 2019, 11, 1723.

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