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Pressure Fluctuations and a Mechanism of Sediment Suspension in Swash Zone
Swash zone is the final leg of wave propagation where wave energy dissipation occurs, accompanying by potential sediment accretion or removal from the beach surface. A full understanding in the complex swash-groundwater-sediment interaction has gradually emerged, promoted by some geographers and coastal scientists in more recent time from undertaking detailed field measurements in the swash zone. From the measured swash velocities and pore-pressure gradients below the beach surface, it helps verify the assumptions of infiltration and exfiltration as possible mechanisms for accretion and erosion from the beach surface, respectively. This paper compliments these findings, by presenting the laboratory results of pressure distribution induced by internal waves on a smooth slope. Regions of fluctuating but persistent positive and negative pressures were found along the swash plane. This could explain why the rippled bed profile occurs after breaking reported elsewhere.
Pressure Fluctuations and a Mechanism of Sediment Suspension in Swash Zone
Swash zone is the final leg of wave propagation where wave energy dissipation occurs, accompanying by potential sediment accretion or removal from the beach surface. A full understanding in the complex swash-groundwater-sediment interaction has gradually emerged, promoted by some geographers and coastal scientists in more recent time from undertaking detailed field measurements in the swash zone. From the measured swash velocities and pore-pressure gradients below the beach surface, it helps verify the assumptions of infiltration and exfiltration as possible mechanisms for accretion and erosion from the beach surface, respectively. This paper compliments these findings, by presenting the laboratory results of pressure distribution induced by internal waves on a smooth slope. Regions of fluctuating but persistent positive and negative pressures were found along the swash plane. This could explain why the rippled bed profile occurs after breaking reported elsewhere.
Pressure Fluctuations and a Mechanism of Sediment Suspension in Swash Zone
Hsu, John R-C (author) / Ariyaratnam, Joe (author)
27th International Conference on Coastal Engineering (ICCE) ; 2000 ; Sydney, Australia
Coastal Engineering 2000 ; 610-623
2001-03-23
Conference paper
Electronic Resource
English
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