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Low-Energy Bedload Transport By Combined Wave And Current Flow On A Southern Mid-Atlantic Bight Shoreface, Malcolm O. Green
Low-Energy Bedload Transport By Combined Wave And Current Flow On A Southern Mid-Atlantic Bight Shoreface, Malcolm O. Green
Dissertations, Theses, and Masters Projects
The control of the mean flow, wind-wave energy and wind-wave asymmetry on low-energy bedload transport magnitude, direction and divergence on a wave-dominated shoreface was investigated. The objective was to develop a mechanistic basis for postulated fairweather replenishment of the beach sediment prism by sediments derived from offshore. Fairweather currents were measured at 17.5-m and 22-m depth. Periods of competent flow were identified using a combined-flow boundary-layer model. Madsen and Grant's (1976) combined-flow bedload-transport model was used to calculate sediment fluxes after modification of the expression for instantaneous transport rate to include a threshold criterion; this was necessary since sediment is …