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Browsing by Author "Holman, Robert A."

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Browsing by Author "Holman, Robert A."

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  • Alongshore current over variable beach topography 
    Slinn, Donald N.; Allen, J. S.; Holman, Robert A. (American Geophysical Union, 2000-07-15)
    The nonlinear dynamics of unstable alongshore currents in the nearshore surf zone over variable barred beach topography are studied using numerical experiments. These experiments extend the recent studies of Allen et a ...
  • Beach foreshore response to long-period waves in the swash-zone 
    Howd, Peter A. (1984-02-10)
    A field experiment designed to test the hypothesis that infragravity and lower frequency waves influence the patterns of erosion and deposition on the beach foreshore has been carried out. The data show coherent fluct ...
  • A behavior‐oriented dynamic model for sandbar migration and 2DH evolution 
    Splinter, Kristen D.; Holman, Robert A.; Plant, Nathaniel G. (American Geophysical Union, 2011-01-29)
    A nonlinear model is developed to study the time‐dependent relationship between the alongshore variability of a sandbar, a(t), and alongshore‐averaged sandbar position, xc(t). Sediment transport equations are derived f ...
  • A dynamical attractor governs beach response to storms 
    Plant, Nathaniel G.; Holland, K. Todd; Holman, Robert A. (American Geophysical Union, 2006)
    Sandbars are ubiquitous, yet not well understood beach features that change their position and shape in response to changing wave conditions. We propose and test a simple empirical model consisting of two coupled line ...
  • Dynamics of the nearshore wave bottom boundary layer 
    Foster, Diane Lyn (1996-06-13)
    This thesis presents an examination of the nearshore wave bottom boundary layer under conditions of significant sediment response. Using both field observations and simple models, the response of the bottom boundary la ...
  • Edge wave response to a modulating incident wave field 
    Lippmann, Thomas Charles (1992-09-09)
  • Edge waves in the presence of strong longshore currents 
    Howd, Peter A.; Bowen, Anthony J.; Holman, Robert A. (American Geophysical Union, 1992)
    A form of the linear, inviscid shallow water wave equation which includes alongshore uniform, but cross-shore variable, longshore currents and bathymetry is presented. This formulation provides a continuum between grav ...
  • Edge waves in the presence of strong longshore currents 
    Howd, Peter A. (1991-05-06)
  • Estimation of wave phase speed and nearshore bathymetry from video imagery 
    Stockdon, Hilary F.; Holman, Robert A. (American Geophysical Union, 2000-09-15)
    A new remote sensing technique based on video image processing has been developed for the estimation of nearshore bathymetry. The shoreward propagation of waves is measured using pixel intensity time series collected a ...
  • Estimation of wave phase speed and nearshore bathymetry using video techniques 
    Stockdon, Hilary F. (1997-08-15)
  • Field evidence of pressure gradient induced incipient motion 
    Foster, D. L.; Bowen, A. J.; Holman, Robert A.; Natoo, P. (American Geophysical Union, 2006-03-04)
    Recently, models for the onshore migration of nearshore sandbars were improved by including an empirical acceleration term in the sediment transport formulation (Hoefel and Elgar, 2003). Here, field observations of the f ...
  • Field observations of the wave bottom boundary layer 
    Foster, D. L.; Beach, R. A.; Holman, Robert A. (American Geophysical Union, 2000-08-15)
    This paper presents a comprehensive set of velocity and suspended sediment observations in the nearshore wave bottom boundary layer, collected during the Duck94 field experiment on the Outer Banks of the North Carolina ...
  • Field validation of a nearshore circulation model for alongshore-nonuniform flows 
    Wilson, Gregory W. (2009-04-01)
    We investigate, theoretically and experimentally, the problem of modeling depth-integrated (2DH) surf zone circulation on an alongshore-nonuniform natural beach, with waves approaching from an arbitrary angle. An approxi ...
  • Foreshore dynamics : swash motions and topographic interactions on natural beaches 
    Holland, K. Todd (1995-03-02)
  • Generation of edge waves in shallow water 
    Lippmann, T. C.; Holman, Robert A.; Bowen, A. J. (American Geophysical Union, 1997)
    Theoretical growth rates for resonantly driven edge waves in the nearshore are estimated from the forced, shallow water equations of motion for the case of a plane sloping bed. The forcing mechanism arises from spatial ...
  • Infragravity waves over a natural barred profile 
    Sallenger, Asbury H. Jr.; Holman, Robert A. (American Geophysical Union, 1987-08-15)
    Measurements of cross-shore flow were made across the surf zone during a storm as a nearshore bar became better developed and migrated offshore. Measured infragravity band spectra were compared to synthetic spectra calcu ...
  • Laboratory investigation of dune erosion using stereo video 
    Palmsten, Margaret L.; Holman, Robert A. (Elsevier, 2012-02)
    Simple parameterizations of dune erosion are necessary for forecasting erosion potential prior to an oncoming storm. Dune erosion may be parameterized in terms of the elevation of the total water level (composed of surge ...
  • Measuring surface longshore currents with an optical technique 
    Chickadel, Carmine C. (2002-08-23)
    Longshore currents are frequently occurring phenomena capable of transporting beach sediments, causing accretion and erosion of the shoreline. Forcing mechanisms are understood and well modeled for cases of alongshore ho ...
  • Nonlinear shear instabilities of alongshore currents over barred beaches 
    Slinn, Donald N.; Allen, J. S.; Newberger, P. A.; Holman, Robert A. (American Geophysical Union, 1998-08-15)
    The nonlinear dynamics of finite amplitude shear instabilities of alongshore currents in the nearshore surf zone over barred beach topography are studied using numerical experiments. These experiments extend the recent ...
  • Observations of nearshore crescentic sandbars 
    van Enckevort, I. M. J.; Ruessink, B. G.; Coco, Giovanni; Suzuki, K.; Turner, I. L.; Plant, Nathaniel G.; Holman, Robert A. (American Geophysical Union, 2004)
    The temporal and spatial variability of crescentic sandbars is analyzed with hourly long-term (months) video observations collected at four barred sites and are qualitatively compared to the temporal and spatial variab ...

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