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  • Measuring sediment transport rates using tracer gravel and RFID technology

    Creator:
    Lewis, Logan L.
    Abstract:
    Rates of sediment transport were determined using tracer gravel and a RFID antenna array at Oak Creek (Oregon) to compare a new method with an existing transport relation created from data previously collected in the same study reach. Close to 3,000 tracers were deployed throughout the study reach and were...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Stephen T. Lancaster Rates of sediment transport were determined using tracer gravel and

  • Characterizing Sediment Flux in Headwaters of the Oregon Coast Range

    Creator:
    Rose, Erik W.
    Abstract:
    Abstract Valleys of headwater channels in the Oregon Coast Range impound significant amounts of sediment, with the majority of deposits originating as debris flows. Headwater valleys function as transitional sedimentary reservoirs linking hillslope sources in active orogens to sinks in sedimentary basins, yet the residence time of deposits in the...
    Resource Type:
    Dissertation

  • Controls on Process and Form in Alluvial and Bedrock Meandering Rivers

    Creator:
    Zunka, John P. P.
    Abstract:
    Bedrock meandering rivers are sinuous channels that pair steep bedrock outside banks with lower gradient slip-off slopes on the inside of bends. These rivers have the potential to record information on climatic and tectonic “external” forcings in their morphology (e.g., longitudinal profiles, strath terraces, channel and valley dimensions). However, geology...
    Resource Type:
    Dissertation
    Full Text:
    Process and Form in Alluvial and Bedrock Meandering Rivers Abstract approved: Stephen T. Lancaster

  • Characterization of Thermal Regimes of Side Channels, Alcoves, and Ponds on the Willamette River, OR

    Creator:
    Gombert, Carolyn E.
    Abstract:
    The thermal regime of rivers plays a key role in aquatic ecosystem health. In the Willamette River, OR, the present day main channel temperature is often too warm for cold water fishes during the late spring, summer, and early fall. At these times, cold water fishes tend to be concentrated...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________________________________ Stephen T. Lancaster The thermal regime of rivers plays a key role in aquatic ecosystem

  • Sediment reservoir dynamics on steepland valley floors : influence of network structure and effects of inherited ages

    Creator:
    Frueh, Walter Terry
    Abstract:
    Sediment deposit ages inferred from radiocarbon dating of stream bank material were used to estimate residence times of valley-floor deposits in headwater valleys of the Oregon Coast Range, USA. Inherited ages of radiocarbon-dated material, i.e., time between carbon fixation in wood and its incorporation in a sediment deposit, can result...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ Stephen T. Lancaster Sediment deposit ages inferred from radiocarbon dating of stream bank

  • Dam removals and downstream bar-pool morphology

    Creator:
    Zunka, John Page Purnell
    Abstract:
    Bar-pool morphology in rivers can provide vital habitat to aquatic species, notably salmonids, which require gravel riffles to bury eggs and pools for hydraulic and cold-water refuge. In some cases, the erosion and subsequent deposition of coarse sediment downstream of a dam removal can modify habitat by inundating bar-pool structure,...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Stephen T. Lancaster Bar-pool morphology in rivers can provide vital habitat to aquatic

  • Sediment transfer and storage in headwater basins of the Oregon Coast Range : transit times from 14C dated deposits

    Creator:
    Underwood, Emily F.
    Abstract:
    In steep headwater basins of the Oregon Coast Range (OCR), debris flows episodically deliver material from low-order tributary basins to larger catchments. Much of this material is stored in valleys and gradually removed by fluvial processes. Quantifying the transfer of material from hillslopes to mainstem channels is essential in understanding...
    Resource Type:
    Masters Thesis
    Full Text:
    . Abstract approved: Stephen T. Lancaster In steep headwater basins of the Oregon Coast Range

  • Hydrology and geomorphic evolution of basaltic landscapes, High Cascades, Oregon

    Creator:
    Jefferson, Anne (Anne Jarvis)
    Abstract:
    The basaltic landscapes of the Oregon High Cascades form a natural laboratory for examining how geologic setting and history influence groundwater flowpaths, streamflow sensitivity to climate, and landscape evolution. In the High Cascades, highly permeable young basaltic lavas form extensive aquifers. These aquifers are the dominant sources of summer streamflow...
    Resource Type:
    Dissertation
    Full Text:
    : ____________________________________________________________ Gordon E. Grant Stephen T. Lancaster The basaltic

  • Sediment Pulse Behavior in Gravel-bedded Rivers

    Creator:
    Pace, Kylie M.
    Abstract:
    As dams approach the end of their useful life, there is need to predict where and how accumulated sediment will move following their removal to estimate impacts on aquatic habitat and infrastructure. Flume studies suggest that sediment pulses disperse in place for most dams, but it is hypothesized that a...
    Resource Type:
    Masters Thesis
    Full Text:
    !Rivers! ! Abstract!approved:! ! Desirée!D.!Tullos! ! ! ! ! ! Stephen!T.!Lancaster! ! As!dams

  • Heat fluxes in the hyporheic zone of a gravel bar on the Willamette River, Oregon

    Creator:
    Squeochs, Graysen M.
    Abstract:
    Increased water temperatures and thermal loading due to anthropogenic inputs has been shown to negatively impact the lifecycles of aquatic organisms in riverine systems (Poole and Berman 2001; Hannah, Malcolm et al. 2004; Quinn, Gagne et al. 2004). The studies enclosed in this thesis evaluate and quantify the heat fluxes...
    Resource Type:
    Masters Thesis