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  • Incipient resuspension of silt-clay deposits in oscillatory and unidirectional flows

    Creator:
    Talebbeydokhti, Nasser
    Abstract:
    Incipient motion of cohesive sediment and the role of flow parameters were investigated for separate and combined unidirectional and oscillatory flows. Sediment from Sturgeon Lake, mainly silt and clay with organic matter, was used as bed material In recirculating and wave flumes. Bench-type experiments indicated that when the submerged sediment...
    Resource Type:
    Dissertation
    Full Text:
    Aspects of Suspended Sediment Transport 10 Properties of Fine-Grained Cohesive Sediment 28 Past

  • Bed material routing and streambed composition in alluvial channels

    Creator:
    Jackson, William L. (William Longstreth)
    Abstract:
    A descriptive model of bed material routing was developed for alluvial streams exhibiting sequences of pools and armored riffles. The model assumes that channel geometry, sediment transport competence and the availability of sediments for transport are all non-uniform in the downstream direction. Bedload transport is described as occurring in two...
    Resource Type:
    Dissertation

  • Sediment transport in a gravel-bottomed stream

    Creator:
    Milhous, Robert T.
    Abstract:
    Sediment transport in a gravel-bottomed stream located in the Oregon Coast Range was studied to determine the effects of a single layer of large particles (the armour layer) located at the surface of the bed material. The bed load transport system was studied jointly with suspended sediment transport to understand...
    Resource Type:
    Dissertation
    Full Text:
    ) &Date) Title: SEDIMENT TRANSPORT IN A GRAVEL-BOTTOMED Sediment transport in a gravel-bottomed stream

  • The Effects of the Flow Regime on Stream Channel Form and Processes

    Creator:
    Hempel, Laura A.
    Abstract:
    Numerous studies have explored how alluvial channel size and morphology are adjusted to different sediment and flow conditions, yet we still know very little about how and to what degree the flow regime controls channel form and processes. We use the term ‘channel form’ to refer to the size and...
    Resource Type:
    Dissertation
    Full Text:
    influence on flow hydraulics, and the sensitivity of sediment transport patterns to climate warming in

  • DNS study of Particle-bed-Turbulence Interactions in Oscillatory Flows

    Creator:
    Ghodke, Chaitanya Deepak
    Abstract:
    Turbulent flows over rough surfaces are encountered in many engineering and geophysical applications. Flows of this nature, due to their increasing technological interests, have been a subject of rigorous investigation in recent years. Of the particular interest to the oceanographic community is the study of turbulent oscillatory flow over rough...
    Resource Type:
    Dissertation
    Full Text:
    sediment transport in coastal environments. Computations of sediment-laden flows typically employ

  • Incipient motion and particle transport in gravel-bed streams

    Creator:
    Matin, Habib
    Abstract:
    The incipient motion of sediment particles in gravel-bed rivers is a very important process. It represents the difference between bed stability and bed mobility. A field study was conducted in Oak Creek, Oregon to investigate incipient motion of individual particles in gravel-bed streams. Investigation was also made of the incipient...
    Resource Type:
    Dissertation
    Full Text:
    function of median bed particle size and channel 7 Relative discharges for transport of sediment 34 8

  • Wave competence and morphodynamics of boulder and gravel beaches

    Creator:
    Lorang, Mark
    Resource Type:
    Dissertation
    Full Text:
    sediment transport processes active during floods. Therefore, extension of the reformatted Shields

  • Observations and prediction of intermittent sediment suspension in the surf zone

    Creator:
    Yoon, Hyun Doug
    Abstract:
    In this dissertation the interactions between hydrodynamics, sediment suspension and transport, and morphological evolution in the surf zone was investigated with a large-scale laboratory experiment data, CROss-Shore Sediment Transport Experiment (CROSSTEX). The data set included comprehensive measurements of water surface elevation, fluid velocity, sediment concentration, and morphology for irregular waves...
    Resource Type:
    Dissertation
    Full Text:
    laboratory experiment data, CROss-Shore Sediment Transport Experiment (CROSSTEX). The data set included

  • 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:
    , 2009. Title: Observations of Cross-Shore Sediment Transport and Formulation of the Undertow Abstract

  • Modeling sediment transport, channel morphology and gravel mining in river bends

    Creator:
    Nam, Ilgi
    Abstract:
    A technique is developed and tested to analyze the interaction of flowing water, bed topography, and bedload sediment transport in meandering channels where gravel bars are removed. The method relates the local velocity distribution, bed shear stress and sediment transport conditions to the local bed configuration in river bends before...
    Resource Type:
    Dissertation
    Full Text:
    Modeling sediment transport, channel morphology and gravel