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Hydrodynamic Drivers of Dissolved Ox...

Pastore, Doug Matthew.

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Hydrodynamic Drivers of Dissolved Oxygen Variability Within a Highly Developed Tidal Creek in Myrtle Beach, South Carolina.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Hydrodynamic Drivers of Dissolved Oxygen Variability Within a Highly Developed Tidal Creek in Myrtle Beach, South Carolina./
作者:	Pastore, Doug Matthew.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	86 p.
附註:	Source: Masters Abstracts International, Volume: 80-05.
Contained By:	Masters Abstracts International80-05.
標題:	Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10846938
ISBN:	9780438550186

Hydrodynamic Drivers of Dissolved Oxygen Variability Within a Highly Developed Tidal Creek in Myrtle Beach, South Carolina.
Pastore, Doug Matthew.

Hydrodynamic Drivers of Dissolved Oxygen Variability Within a Highly Developed Tidal Creek in Myrtle Beach, South Carolina. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 86 p.

Source: Masters Abstracts International, Volume: 80-05.

Thesis (M.S.)--Coastal Carolina University, 2018.

This item must not be sold to any third party vendors.

Erosion and water quality degradation have been observed in Singleton Swash in Myrtle Beach, SC, and have been hypothesized to be related to migration of the beach-face channel. Dredging this channel temporarily fixes erosional threats to nearby infrastructure but the effects on water quality are not well understood. It is hypothesized that variations in dissolved oxygen (DO) concentration (used here as a proxy for water quality) within the water column are related to changes in vertical mixing and transport due to oceanic tidal forcing. This study utilizes current meters, pressure sensors, and optical DO probes to measure and study the relationships between flow characteristics, DO, and water level. Correlation analysis is used to examine the influence of each physical process on dissolved oxygen variations as well as to explore the relationships between hydrodynamic variables. Results show that larger tidal ranges are associated with higher mean levels of DO concentration in the swash. The larger tidal ranges are linked to greater magnitude currents, and due to tidal asymmetries in the swash, flood currents are stronger than ebb currents. Stronger currents are also linked to larger Reynolds shear stress indicating increased mixing on flood tides relative to ebb tides. It is concluded that the combined transport of oxygenated waters into the swash on large flood tides, and its subsequent mixing due to strong currents, result in increased DO concentrations in the swash. This result is also supported by the direct correlation found between DO concentration and tidal ranges. Health of the ecosystem depends on strong currents and higher magnitude Reynolds shear stress to maintain high DO concentrations within the system. It was found in Hoffnagle (2015) that lower beach-face elevations correlate with larger tidal ranges in the swash; thus, maintenance of the beach-face swash channel is imperative to support a large tidal range and therefore overall ecosystem health.

ISBN: 9780438550186Subjects--Topical Terms:

516476
Ecology.

Hydrodynamic Drivers of Dissolved Oxygen Variability Within a Highly Developed Tidal Creek in Myrtle Beach, South Carolina.
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520 $a Erosion and water quality degradation have been observed in Singleton Swash in Myrtle Beach, SC, and have been hypothesized to be related to migration of the beach-face channel. Dredging this channel temporarily fixes erosional threats to nearby infrastructure but the effects on water quality are not well understood. It is hypothesized that variations in dissolved oxygen (DO) concentration (used here as a proxy for water quality) within the water column are related to changes in vertical mixing and transport due to oceanic tidal forcing. This study utilizes current meters, pressure sensors, and optical DO probes to measure and study the relationships between flow characteristics, DO, and water level. Correlation analysis is used to examine the influence of each physical process on dissolved oxygen variations as well as to explore the relationships between hydrodynamic variables. Results show that larger tidal ranges are associated with higher mean levels of DO concentration in the swash. The larger tidal ranges are linked to greater magnitude currents, and due to tidal asymmetries in the swash, flood currents are stronger than ebb currents. Stronger currents are also linked to larger Reynolds shear stress indicating increased mixing on flood tides relative to ebb tides. It is concluded that the combined transport of oxygenated waters into the swash on large flood tides, and its subsequent mixing due to strong currents, result in increased DO concentrations in the swash. This result is also supported by the direct correlation found between DO concentration and tidal ranges. Health of the ecosystem depends on strong currents and higher magnitude Reynolds shear stress to maintain high DO concentrations within the system. It was found in Hoffnagle (2015) that lower beach-face elevations correlate with larger tidal ranges in the swash; thus, maintenance of the beach-face swash channel is imperative to support a large tidal range and therefore overall ecosystem health.
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