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Filtering by: Creator Tullos, Desirée Remove constraint Creator: Tullos, Desirée Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • 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
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    Desiree D. Tullos Multipurpose management of hydrosystems face a number of uncertainties related to

  • 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....
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    Dissertation
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    : . Desireé Tullos Proper use of vegetation in streambank bioengineering practices requires a

  • Development and application of climate risk assessment methods for flood management systems – a study of flexibility, adaptive capacity, and robustness

    Creator:
    DiFrancesco, Kara N.
    Abstract:
    Discussions around adapting water management systems to climate change often express the need to increase the flexibility and adaptive capacity of current systems, and to implement robust strategies going forth. While these topics lie at the center of many climate change discussions, transforming adaptation recommendations into tangible tools and information...
    Resource Type:
    Dissertation
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     State  University,   Corvallis,  Oregon     Desiree  D.  Tullos,  Associate

  • Development and decommissioning of small dams : analysis of impact and context

    Creator:
    Kibler, Kelly Maren
    Abstract:
    Management of small dams may have profound implications for the health and integrity of small rivers and freshwater diversity. Global indicators suggest future growth in the small hydropower sector, particularly in developing countries. As a renewable energy source, it is often presumed that small hydropower entails fewer and less severe...
    Resource Type:
    Dissertation
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     of Small Dams: Analysis of Impact and  Context.    Abstract approved:        Desiree D. Tullos

  • From Perception to Planning : Adaptation in Flood-risk Communities

    Creator:
    Gomez, Luis A.
    Abstract:
    This research asserts that flood risk perception of individuals living in floodplains influences their preparedness for taking actions to protect themselves from flood hazards. The results of this research are backed up by quantitative analysis of survey responses of individuals living in floodplains of Corvallis, OR in the USA. The...
    Resource Type:
    Dissertation
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    : ______________________________________________________ Meghna Babbar-Sebens Desiree Tullos This research asserts that flood risk perception

  • The effects of irrigation water withdrawals on macroinvertebrate community structure and life history strategies

    Creator:
    Miller, Scott W.
    Abstract:
    I used current water management practices in central and eastern Oregon and Washington as natural experiments to quantify the effects of irrigation water withdrawals on macroinvertebrate community structure and life history strategies. Reduced discharge had direct (e.g. decreased velocity and wetted habitat) and indirect (e.g. increased conductivity and temperature) effects...
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    Dissertation
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    fruition. I would also like to thank my other committee members Dr. Bruce McCune and Dr. Desiree

  • The effects of land use on mineral flat wetland hydrologic processes in lowland agricultural catchments

    Creator:
    Marshall, Sarah M.
    Abstract:
    Hydrologic processes within mineral flat wetlands, along with their connections to groundwater and downstream surface water in lowland agricultural catchments are poorly understood, particularly under different land uses. In the three field studies included in this thesis, we examined infiltration, wetland hydroperiod, groundwater recharge dynamics, surface runoff generation, and water...
    Resource Type:
    Dissertation
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    : _____________________________________________________ Desireé D. Tullos Hydrologic processes within mineral flat wetlands, along with their

  • Multi-objective Optimization of Reservoir Operation Under Uncertainty with Robust and Flexible Decision Variables

    Creator:
    Hosseini, Parnian
    Abstract:
    Optimization of reservoir operation is involves various competing objectives for a scarce resource (water). To find the optimal operation of reservoirs, it is essential to consider multiple objectives simultaneously. There are various sources of uncertainty associated with the reservoir operation problem that should be considered as well. The overarching goal...
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    Dissertation
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    brainstorm discussions; Dr. Desiree Tullos for valuable feedback and guidance and Dr. Hoyle for all the

  • Ecological responses to riverine floods and flow alteration

    Creator:
    McMullen, Laura E.
    Abstract:
    Floods are major disturbance events for riverine ecosystems, directly and indirectly impacting organisms and their habitat. In this study I investigated the role of riverine floods and flow alteration in regulating aquatic macroinvertebrate population and community structure. I examined this problem using a variety of methods: a meta-analytic review of...
    Resource Type:
    Dissertation
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    , Elizabeth Borer, Russ Ingham, and Desiree Tullos, for their commitment to the success of my graduate

  • Two Essays on the Management of the West Coast Salmon Fishery

    Creator:
    Vasquez-Caballero, Smit
    Abstract:
    The West Coast salmon fishery presents several complexities that have received little attention in the fisheries economics literature. Two of those complexities are reviewed and analyzed in this dissertation. The first, salmon fishermen participate in alternative fisheries within a season demonstrating a complex switching behavior between different species. Second, the...
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    Dissertation
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    Weitkamp and Dr. Desiree Tullos for their comments and sug- gestions regarding my proposal and