Sediment transfer from bar to beach? Measurements using a Pulse-Coherent Acoustic Doppler Profiler
Publikation: Bidrag til bog/antologi/rapport › Konferencebidrag i proceedings › Forskning › fagfællebedømt
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Sediment transfer from bar to beach? Measurements using a Pulse-Coherent Acoustic Doppler Profiler. / Aagaard, Troels; Hughes, Michael; Greenwood, Brian.
Journal of Coastal Research. Bind Special Issue 64 USA : Coastal Education and Research Foundation, 2011. s. 2002-2006.Publikation: Bidrag til bog/antologi/rapport › Konferencebidrag i proceedings › Forskning › fagfællebedømt
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TY - GEN
T1 - Sediment transfer from bar to beach? Measurements using a Pulse-Coherent Acoustic Doppler Profiler
AU - Aagaard, Troels
AU - Hughes, Michael
AU - Greenwood, Brian
N1 - Conference code: 11
PY - 2011
Y1 - 2011
N2 - Earlier field measurements of sediment transport in bar troughs have indicated that onshore transport across troughs is very small and that on barred beaches, sediment mass transfer from the bar to the beach occurs mainly through bar welding. Here, we revisit the issue using novel instrumentation that is capable of recording suspended sediment transport at high resolution down to about 0.8 cm above the seabed. It was found that under accretionary fairweather conditions, a bar eroded and a beach berm accreted but the net suspended sediment transport across the trough was very small and seaward directed. The observed berm accretion could also not be ascribed to bedload transport through migration of wave ripples. It is concluded that even under favourable conditions, onshore sediment transport across bar troughs appears to be limited.
AB - Earlier field measurements of sediment transport in bar troughs have indicated that onshore transport across troughs is very small and that on barred beaches, sediment mass transfer from the bar to the beach occurs mainly through bar welding. Here, we revisit the issue using novel instrumentation that is capable of recording suspended sediment transport at high resolution down to about 0.8 cm above the seabed. It was found that under accretionary fairweather conditions, a bar eroded and a beach berm accreted but the net suspended sediment transport across the trough was very small and seaward directed. The observed berm accretion could also not be ascribed to bedload transport through migration of wave ripples. It is concluded that even under favourable conditions, onshore sediment transport across bar troughs appears to be limited.
M3 - Article in proceedings
VL - Special Issue 64
SP - 2002
EP - 2006
BT - Journal of Coastal Research
PB - Coastal Education and Research Foundation
CY - USA
T2 - International Costal Symposium
Y2 - 9 May 2011 through 14 May 2011
ER -
ID: 34202560