Oscillatory bedload transport: Data review and simple formulation

Bedload and wave thrust computations of alongshore sand transport

“…In unidirectional flow, total transport rates in situations with large suspended load exhibit a dependence on flow velocity to a higher power than do bedload rates [Yalin, 1977]. Some evidence of a similar effect can be discerned in available transport data for fine sand at high values of peak velocity in oscillatory flow [Hailermeier, 1982]. A possible significant role for suspended load in alongshore sand transport cannot be ruled out despite the apparent agreement of laboratory and field results with a bedloadlike transport dependence, or the evidence considered by Komar [1978], because no truly extreme situations are represented in the available data base.…”

“…The basic bedload dependence in (1) pertains to 'fully developed' transport, and no more intense regime of bedload processes has been identified in available oscillatory flow measurements [Hailermeier, 1982]. Field data and laboratory data from appropriate test situations show clear agree-ment with (8) and (5) for total alongshore sand transport rates.…”

Bedload and wave thrust computations of alongshore sand transport

“…In unidirectional flow, total transport rates in situations with large suspended load exhibit a dependence on flow velocity to a higher power than do bedload rates [Yalin, 1977]. Some evidence of a similar effect can be discerned in available transport data for fine sand at high values of peak velocity in oscillatory flow [Hailermeier, 1982]. A possible significant role for suspended load in alongshore sand transport cannot be ruled out despite the apparent agreement of laboratory and field results with a bedloadlike transport dependence, or the evidence considered by Komar [1978], because no truly extreme situations are represented in the available data base.…”

“…The basic bedload dependence in (1) pertains to 'fully developed' transport, and no more intense regime of bedload processes has been identified in available oscillatory flow measurements [Hailermeier, 1982]. Field data and laboratory data from appropriate test situations show clear agree-ment with (8) and (5) for total alongshore sand transport rates.…”

Initial motion and pivoting characteristics of sand particles in uniform and heterogeneous beds: experiments and modelling

“…It is frequently reported that combined or oscillatory¯ow thresholds are higher than recorded for similar sediments under steady¯ows (e.g. Madsen & Grant, 1976;Hallermeier, 1982;Lee-Young & Sleath, 1988). Several explanations have been forwarded, generally stemming from the physical dissimilarity of the steady and oscillatory¯ow cases.…”

On the predictive skill of morphodynamic models for onshore sandbar migration

“…For a purely asymmetric wave, Equation 7 would predict zero net sediment transport. However, skewed pressure gradient forces acting on the sediments result in a net sediment transport (Hallermeier, 1982;Watanabe & Sato, 2005). The effect of pressure gradient on sediments can be estimated using the flow acceleration (Nielsen, 2006).…”

Bedload and wave thrust computations of alongshore sand transport

“…In unidirectional flow, total transport rates in situations with large suspended load exhibit a dependence on flow velocity to a higher power than do bedload rates [Yalin, 1977]. Some evidence of a similar effect can be discerned in available transport data for fine sand at high values of peak velocity in oscillatory flow [Hailermeier, 1982]. A possible significant role for suspended load in alongshore sand transport cannot be ruled out despite the apparent agreement of laboratory and field results with a bedloadlike transport dependence, or the evidence considered by Komar [1978], because no truly extreme situations are represented in the available data base.…”

“…The basic bedload dependence in (1) pertains to 'fully developed' transport, and no more intense regime of bedload processes has been identified in available oscillatory flow measurements [Hailermeier, 1982]. Field data and laboratory data from appropriate test situations show clear agree-ment with (8) and (5) for total alongshore sand transport rates.…”

Initial motion and pivoting characteristics of sand particles in uniform and heterogeneous beds: experiments and modelling

“…It is frequently reported that combined or oscillatory¯ow thresholds are higher than recorded for similar sediments under steady¯ows (e.g. Madsen & Grant, 1976;Hallermeier, 1982;Lee-Young & Sleath, 1988). Several explanations have been forwarded, generally stemming from the physical dissimilarity of the steady and oscillatory¯ow cases.…”

On the predictive skill of morphodynamic models for onshore sandbar migration

“…For a purely asymmetric wave, Equation 7 would predict zero net sediment transport. However, skewed pressure gradient forces acting on the sediments result in a net sediment transport (Hallermeier, 1982;Watanabe & Sato, 2005). The effect of pressure gradient on sediments can be estimated using the flow acceleration (Nielsen, 2006).…”

Bedload and wave thrust computations of alongshore sand transport

“…In unidirectional flow, total transport rates in situations with large suspended load exhibit a dependence on flow velocity to a higher power than do bedload rates [Yalin, 1977]. Some evidence of a similar effect can be discerned in available transport data for fine sand at high values of peak velocity in oscillatory flow [Hailermeier, 1982]. A possible significant role for suspended load in alongshore sand transport cannot be ruled out despite the apparent agreement of laboratory and field results with a bedloadlike transport dependence, or the evidence considered by Komar [1978], because no truly extreme situations are represented in the available data base.…”

“…The basic bedload dependence in (1) pertains to 'fully developed' transport, and no more intense regime of bedload processes has been identified in available oscillatory flow measurements [Hailermeier, 1982]. Field data and laboratory data from appropriate test situations show clear agree-ment with (8) and (5) for total alongshore sand transport rates.…”

Initial motion and pivoting characteristics of sand particles in uniform and heterogeneous beds: experiments and modelling

“…It is frequently reported that combined or oscillatory¯ow thresholds are higher than recorded for similar sediments under steady¯ows (e.g. Madsen & Grant, 1976;Hallermeier, 1982;Lee-Young & Sleath, 1988). Several explanations have been forwarded, generally stemming from the physical dissimilarity of the steady and oscillatory¯ow cases.…”

On the predictive skill of morphodynamic models for onshore sandbar migration

“…For a purely asymmetric wave, Equation 7 would predict zero net sediment transport. However, skewed pressure gradient forces acting on the sediments result in a net sediment transport (Hallermeier, 1982;Watanabe & Sato, 2005). The effect of pressure gradient on sediments can be estimated using the flow acceleration (Nielsen, 2006).…”