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  • Roughness and geometry effects of engineered log jams on 1-D flow characteristics

    Creator:
    Valverde, Rachelle S.
    Abstract:
    The re-introduction of large woody debris (LWD) into streams and rivers for stream restoration purposes is rapidly growing. Engineered log jams (ELJs) are man-made structures intended to mimic natural LWD structures, designed and installed to protect stream banks from erosion while increasing habitat diversity. Several studies have evaluated the flow...
    Resource Type:
    Masters Thesis
    Full Text:
    : ________________________________________________________________ Desirée D. Tullos The re-introduction of large woody debris (LWD) into streams and rivers

  • Effects of Stage 0 treatment on spring Chinook juveniles within South Fork McKenzie River in Oregon

    Creator:
    Hahn, Aleah
    Abstract:
    Low-tech habitat restoration techniques, including Stage 0 treatments, are increasingly applied but often lack robust evaluation of their effects. In 2018, one kilometer of the South Fork McKenzie (SFMK) River, OR was modified to the Stage 0 condition for the benefit of ESA-listed Chinook by raising the incised channel to...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Desiree Tullos Low-tech habitat restoration techniques, including Stage 0 treatments, are

  • Influence of vegetation on streambank hydraulics

    Creator:
    Czarnomski, Nicole M.
    Abstract:
    Proper use of vegetation in streambank bioengineering practices requires a comprehensive understanding of the influence of vegetation density on streambank hydraulics. A series of studies were conducted to investigate the relationship between independent variables vegetation density, bank angle, and discharge and dependent variables channel velocity, resistance, turbulence, and shear stress....
    Resource Type:
    Dissertation
    Full Text:
    : . Desireé Tullos Proper use of vegetation in streambank bioengineering practices requires a

  • Large Wood Hydraulics: Using Structure-from-Motion to Estimate Flow Depths

    Creator:
    Tutka, Michal
    Abstract:
    Estimating how large instream wood (LW) may impact local hydraulics is critical both for mitigating flood hazards and for ensuring intended habitat benefits of the LW are produced. In practice, the design of forms such as LW is limited by a lack of mechanistic tools for estimating how LW features...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Desirée Tullos Estimating how large instream

  • Assessing the Impact of Storm Regime on Remotely-sensed Precipitation Extremes Across the Western Himalaya

    Creator:
    Stanton, Alan L.
    Abstract:
    Extreme, flood-producing precipitation events in mountains threaten human life and local and national economies. In the Himalayas, scarce meteorological data historically limited understanding of the underlying processes driving extreme events. However, the capacity to observe, measure and quantify precipitation on regional scales has increased tremendously over the last three decades...
    Resource Type:
    Masters Thesis
    Full Text:
    : ________________________________________________________________________ Desiree D. Tullos Extreme, flood

  • Effects of timing and duration of flooding on phosphorus release in four restored wetlands around Agency and Upper Klamath Lakes, Oregon

    Creator:
    Stevens, Carla J.
    Abstract:
    Upper Klamath Lake (UKL) and Agency Lake in south-central Oregon are hypereutrophic due to phosphorus (P) loading from both geologic and agricultural sources in the watershed. Restoring historic lake-fringe wetlands to provide P sinks around the lakes has been accepted as a favorable means of reducing lake P levels and...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: _________________________________________ Desiree Tullos Upper Klamath Lake (UKL) and

  • Water scarcity and reservoir reliability in basins affected by climate and land use change : impacts of hydrogeology, sensitivities, and uncertainties in the Santiam River Basin, Oregon

    Creator:
    Mateus, M. Cristina
    Abstract:
    Multipurpose management of hydrosystems face a number of uncertainties related to hydrologic variability and nonstationarity. Anticipated air temperature increases in the Pacific Northwest region are projected to alter the timing and quantity of streamflow associated with precipitation shifting from snow to rain, including shorter winter runoff periods, earlier spring runoff,...
    Resource Type:
    Dissertation
    Full Text:
    Desiree D. Tullos Multipurpose management of hydrosystems face a number of uncertainties related to

  • Tradeoffs and Preferences between Flood Mitigation Measures

    Creator:
    Byron, Elizabeth G.
    Abstract:
    Floods remain the world’s most destructive natural hazard, despite centuries of efforts to minimize losses. Understanding public preferences for flood mitigation measures, and the impacts of these measures, is key to minimizing flood-induced losses. This study quantified tradeoffs between flood mitigation measures and determined factors that influence public preferences for...
    Resource Type:
    Honors College Thesis
    Full Text:
    Desiree Tullos Floods remain the world’s most destructive natural hazard, despite centuries of

  • Physical Modeling of the Feedbacks Between a Reed Canarygrass (Phalaris arundinacea) Patch, Hydraulics, and Bedform Evolution

    Creator:
    Elliott, Susan H.
    Abstract:
    Reed Canarygrass (RCG) is an aggressive invader in aquatic ecosystems that swiftly modifies the environment and decreases biodiversity. A physical model was used to investigate the mechanisms by which RCG spreads. Experimental trials were implemented to examine feedbacks between a mid-channel patch of the flexible RCG, hydraulics, and bedform evolution...
    Resource Type:
    Masters Thesis
    Full Text:
    . Abstract approved: ______________________________________________________ Desirée D. Tullos Reed

  • Hydrogeography of Cloudburst Flooding in the Himalaya

    Creator:
    Michelsen, Sonja
    Abstract:
    Even though cloudburst events in high mountain areas can be highly destructive and result in significant losses of life, little is known definitively about these flood events. An exact understanding of the driving processes, typical precipitation rates, and impacts of cloudburst events remain uncertain. This study seeks to advance knowledge...
    Resource Type:
    Honors College Thesis
    Full Text:
    : ________________________________________________________________________ Desirée Tullos Even though cloudburst events in high mountain areas can be highly