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Filtering by: Creator Özkan-Haller, H. Tuba Remove constraint Creator: Özkan-Haller, H. Tuba Rights Statement In Copyright Remove constraint Rights Statement: In Copyright

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  • 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:
    River. Abstract approved:_____________________________________________________ H. Tuba Özkan

  • 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:
    on Nearshore Circulation Abstract approved: H. Tuba Ozkan-Haller The rip current field resulting

  • Breaking Waves Offshore: Measurements and Modeling of Energy Dissipation

    Creator:
    Ticona Rollano, Fadia M.
    Abstract:
    In the presence of strong winds, ocean surface waves dissipate significant amounts of energy by breaking. Here, breaking rates and wave-following turbulent dissipation rate measurements are compared with numerical WAVEWATCH III estimates of bulk energy dissipation. At high winds, the measurements suggest that turbulent dissipation becomes saturated, however the modeled...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ H. Tuba Özkan‒Haller In the presence of strong winds, ocean surface waves dissipate

  • Toward wave energy in Oregon : predicting wave conditions and extracted power

    Creator:
    Oskamp, Jeffrey A.
    Abstract:
    Knowledge of wave conditions in nearshore regions supports the development of ocean wave energy technology by providing wave climatology for device design considerations, and power output estimates. By modeling wave transformation over the continental shelf, wave conditions were predicted in nearshore regions where potential wave energy conversion sites are located....
    Resource Type:
    Masters Thesis
    Full Text:
    would like to thank my advisor, Dr. H. Tuba Özkan-Haller, for the time she spent working with me on

  • 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:
    -Water Hydrodynamics: Rotations, Rips, and Rivers Abstract approved: H. Tuba Özkan-Haller

  • 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:
    approved: H. Tuba Özkan-Haller A new set of data from a large-scale sand bar migration experiment is

  • Wave field patterns generated by wave energy converters

    Creator:
    McNatt, J. Cameron
    Abstract:
    The eventual deployment of wave energy converters (WECs) on a commercial scale will necessitate the grouping of devices into arrays or "wave farms," in order to minimize overhead costs of mooring, maintenance, installation, and electrical cabling for shoreward power delivery. Closely spaced WECs will interact hydrodynamically through diffracted and radiated...
    Resource Type:
    Masters Thesis
    Full Text:
    Patterns Generated by Wave Energy Converters Abstract approved: H. Tuba Özkan-Haller The eventual

  • Wave propagation processes at the mouth of the Columbia River

    Creator:
    Andes, Lisa (Lisa Christine)
    Abstract:
    The mouth of the Columbia River (MCR) has a longstanding reputation of hazardous navigational conditions. This reputation has been developing since the first ship, the Columbia, traversed through the inlet in 1792. The hazardous conditions are related to the large waves and strong tidal currents that are common in the...
    Resource Type:
    Masters Thesis
    Full Text:
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  • Depth-dependence of surf zone eddies : a study at Duck, NC

    Creator:
    Aiken, Rebecca A.
    Abstract:
    Surf zone eddies (f < 0.01 Hz) are important in nearshore mixing, shoreline erosion, the distribution of pollutants, and ecological processes, such as offshore transport of larvae. Surf zone eddies have traditionally been treated as two-dimensional features with horizontal length scales larger than the local water depth. Studies by Lippmann...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ H. Tuba Özkan-Haller Surf zone eddies (f < 0.01 Hz) are important in nearshore mixing

  • 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:
    : _____________________________________________________________________ H. Tuba Özkan-Haller This thesis contains a manuscript describing the implementation of a