HR: 15:05h
AN: OS23E-06    [Abstracts]
TI: NUMERICAL EXPERIMENTS OF GENERATION OF LOW-FREQUENCY WAVES
AU: * Dodd, N
EM: Nick.Dodd@Nottingham.ac.uk
AF: University of Nottingham School of Civil Engineering, University Park, Nottingham, NG72RD United Kingdom
AB: Much work has been undertaken in the last two decades to understand the process by which low-frequency surface gravity waves (LFWs) are generated in the nearshore region. In this presentation numerical experiments are undertaken to illustrate a generation mechanism, similar to but nevertheless distinct from that of Symonds et al (1982). The mechanism is that of 'bore reflection' (Peregrine, 1974) and results indicate that it is possible that this process can also be active in LFW generation on real beaches, perhaps particularly for highler modulated wave groups. Discrepancies are noted (e.g. short wave to lFW amplitude) as well as similarities with Symonds et al (1982) breakpoint hypothesis are noted.
DE: 4546 Nearshore processes
DE: 4560 Surface waves and tides (1255)
SC: Ocean Sciences [OS]
MN: 2004 AGU Fall Meeting