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Filtering by: Creator Holman, Chelsea L. Remove constraint Creator: Holman, Chelsea L. Advisor Ozkan Haller, H. Tuba Remove constraint Advisor: Ozkan Haller, H. Tuba

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  • Offshore controls on nearshore circulation

    Creator:
    Long, Joseph W.
    Abstract:
    The rip current field resulting from the transformation of surface gravity waves over offshore submarine canyons is studied. Employing a wave transformation model and a wave-induced circulation model over observed bathymetry we find that rip current circulation cells exist with alongshore spacing of O(1OOm) even though the nearshore bathymetry displayed...
    Resource Type:
    Masters Thesis
    Full Text:
    committee members, Rob Holman and Mick Haller who have provided such useful feedback in my research

  • Field validation of a nearshore circulation model for alongshore-nonuniform flows

    Creator:
    Wilson, Gregory W.
    Abstract:
    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 approximate theoretical model is developed, which captures the important effect of advection in the alongshore dynamics, and shows that a nondimensional parameter Re[subscript]s...
    Resource Type:
    Masters Thesis
    Full Text:
    Robert A. Holman We investigate, theoretically and experimentally, the problem of modeling depth

  • Extreme Wave Runup and Runup Variability on Beaches

    Creator:
    Li, Chuan
    Abstract:
    Wave runup is an important physical process that affects nearshore sediment transport, coastal erosion, and flooding. Large and unexpected runup events can also be dangerous to beach goers. Extreme runup statistics are essential parameters used in engineering design of marine structures and in coastal management. Although the study of runup...
    Resource Type:
    Dissertation
    Full Text:
    . Tuba Özkan-Haller (also Chapters 3 and 4), Gabriel Garca-Medina (also Chapter 3), Robert A. Holman

  • Data assimilation for prediction of shallow water flows with uncertain bathymetry

    Creator:
    Wilson, Gregory W.
    Abstract:
    A new method is introduced for incorporating bathymetric uncertainty into predictions of nearshore and river flows (i.e., unstratified flows primarily forced by pressure and radiation stress gradients). The method involves the use of the ensemble Kalman filter (EnKF) as a parameter estimation scheme, where the parameter to be estimated is...
    Resource Type:
    Dissertation
    Full Text:
    commitment of a PhD. More recently, Tuba ¨ Ozkan-Haller and Rob Holman have provided me with every

  • Modeling shallow-water hydrodynamics : rotations, rips, and rivers

    Creator:
    Long, Joseph W.
    Abstract:
    Hydrodynamic models are used as a diagnostic tool to understand the temporal variability of shallow-water processes that are difficult to completely resolve with traditional field measurements. For all simulations, modeled quantities are qualitatively or quantitatively compared with available measurements to gain confidence in conclusions derived from the modeled results. In...
    Resource Type:
    Dissertation
    Full Text:
    reaching it is even an attainable goal. Thank you also to the rest of my committee including Rob Holman

  • Wave runup : Physics, variability, and societal impacts

    Creator:
    García Medina, Gabriel
    Abstract:
    The U.S. Pacific Northwest is home to one of the most extreme wave climates in the world with waves of 10 m in height arriving to the coast approximately each year. With an average water temperature of 12℃, the beaches in the region are too cold to go on a...
    Resource Type:
    Dissertation
    Full Text:
    responsible for my 2 + 1 + 4.5 year OSU tenure. I thank Rob Holman for all the insightful conversations and

  • Data Assimilation using Synthetic-Aperture Radar Imagery for Bathymetry Inversion at the Mouth of the Columbia River

    Creator:
    Harper, Spencer H.
    Abstract:
    Synthetic-aperture radar (SAR) imagery can provide wavenumber and frequency data to generate bathymetry estimates for locations where limited access or extreme ocean conditions can make standard bathymetry survey techniques difficult or impossible. The availability of SAR data could allow for regular bathymetry estimates of navigational channels providing insight into dredging...
    Resource Type:
    Masters Thesis
    Full Text:
    relationship using X-band radar and the cBathy algorithm (Holman et al., 2013; Plant et al., 2008) was

  • Observations of cross-shore sediment transport and formulation of the undertow

    Creator:
    Guannel, Gregory E.
    Abstract:
    A new set of data from a large-scale sand bar migration experiment is presented. During this experiment, two sandbars were generated. One of the bar was generated by the action of undertow, and sediment moved offshore. The other bar was generated by the shoreward movement of sediment coming from the...
    Resource Type:
    Dissertation
    Full Text:
    like to thank Dr. Rob Holman, for creating such a great environment. Also, I would like to thank Greg

  • Nearshore wave predictions along the Oregon and southwest Washington coast

    Creator:
    García-Medina, Gabriel
    Abstract:
    This thesis contains a manuscript describing the implementation of a high resolution wave forecasting model for the coasts of Washington and Oregon. The purpose of this project was to advance the wave predictive capabilities of the states of Oregon and the southwest part of Washington by including the effects of...
    Resource Type:
    Masters Thesis
    Full Text:
    McNatt, Cássia Pianca, Katy Serafin, Adam Keen, Kyle Landon, John Stanley, and Dr. Rob Holman for

  • Nearshore hydrodynamic model comparisons and predictions of bathymetric evolution

    Creator:
    Lescinski, Jamie M.
    Abstract:
    The surf zone exhibits large energetic signals from wave shoaling and subsequent dissipation due to breaking, forcing circulation. The bathymetry responds to the wave and wave-induced circulation with the growth, transport, and destruction of large scale bathymetric features, such as mega ripples and sand bars. There is an obvious fluctuation...
    Resource Type:
    Masters Thesis
    Full Text:
    3.5 LIPl 1D Test Case 1B0304: Comparisons of measured and predicted final bathymetries for the 2n<l