Sediment Threshold Under Oscillatory Waves

Komar, Paul D.; Miller, Martin C.

doi:10.9753/icce.v14.44

Cited by 51 publications

(36 citation statements)

References 8 publications

(7 reference statements)

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“…() findings. However, the boundary separating rolling from saltation transport modes varies within the 7 to 9 m s –1 interval for the largest particles which clearly exceeds the range predicted by Nott () but roughly agree with results derived from Komar and Miller ().…”

Section: Resultssupporting

confidence: 89%

“…Komar and Miller (), Hallermeier () and Soulsby () addressed the issue of threshold wave height required to induce motion of particles resting in the sea floor and compared computed results with experimental data. Application of Airy wave theory in combination with the latter solutions makes it possible to convert flow velocities necessary to induce motion to maximum orbital velocities near the bottom of the sea associated with near‐breaking wind waves.…”

Section: Discussionmentioning

confidence: 99%

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Boulder deposition during major tsunami events

Costa

Andrade

Freitas

et al. 2011

Earth Surf Processes Landf

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Abstract:A remarkable accumulation of marine boulders located above the present spring tide level has occurred in two coastal lowlands of the Algarve (Portugal). The size-interval of the particles studied here is seldom reported in the literature in association with extreme events of coastal inundation, thus making this study of relevance to many other coasts worldwide. The spreads of boulders extend several hundred meters inland and well beyond the present landward limit of storm activity. The marine origin of the boulders is demonstrated by well-developed macro-bioerosion sculpturing and in situ skeletal remains of endolithic shallow marine bivalves. The good state preservation of the fossils within the boulders indicates that abrasion duringtransport and redeposition was not significant. We envisage boulder deposition as having taken place during the Lisbon tsunami of ad 1755 through the simultaneous landward entrainment of coarse particles from nearshore followed by rapid shoreward suspended-dominated transport and non-graded redeposition that excluded significant sorting by weight or boulder dimensions. We use numerical hydrodynamic modeling of tsunami (and storm) waves to test the observational data on boulder dimensions (density, size, distribution) on the most likely processes of sediment deposition. This work demonstrates the effectiveness of the study of boulder deposits in tsunami reconstruction.

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Section: Resultssupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Boulder deposition during major tsunami events

Costa

Andrade

Freitas

et al. 2011

Earth Surf Processes Landf

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show abstract

“…Komar & Miller (1974) found that the diagram is approximately valid also for turbulent rough oscillatory flow down to a grain size of 0 .1 mm . For particles of 0 .1 mm the shear velocity is about 1 cm s -'.…”

Section: Critical Shear Stressmentioning

confidence: 84%

Wild-induced resuspension in a small shallow lake

Bengtsson

Hellström

1992

Hydrobiologia

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“…For non-cohesive material and uni-directed flow, the critical shear is determined from the Shields diagram . Komar & Miller (1974) found the diagram to be valid for oscillatory flow when the grain size exceeded 0 . divided by density of water) .…”

Section: Erosion Theorymentioning

confidence: 99%

Redistribution of sediments in three Swedish lakes

Bengtsson

Hellström

Rákóczi³

1990

Hydrobiologia

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Sedimentation and redistribution of fine sediments in three Swedish lakes of different character have been investigated using settling sediment traps . The bottom shear stress from wind generated waves are calculated and the extension of erodable bottom area is related to wind conditions . Wave induced erosion and deposition during and after cessation of storms in different parts of a lake are discussed theoretically . It is shown that a single one year storm may redistribute more bottom material than the accumulated resuspension caused by frequent but smaller wind events . The settling sediment trap deposition and the concentration of suspended solids are related to the extension of erodable bottom area of particular storms . It is found that in lakes where there are relatively large areas of erosion bottoms, resuspended material from the part of the lake most susceptible to strong winds of large fetch constitutes a major part of the settled material on deep bottoms .

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Sediment Threshold Under Oscillatory Waves

Cited by 51 publications

References 8 publications

Boulder deposition during major tsunami events

Boulder deposition during major tsunami events

Wild-induced resuspension in a small shallow lake

Redistribution of sediments in three Swedish lakes

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