Search Constraints

Start Over
Filtering by: Advisor McDonnell, Jeffrey J. Remove constraint Advisor: McDonnell, Jeffrey J. Language English [eng] Remove constraint Language: English [eng]

Search Results

  • Spatial and temporal runoff response to snowmelt, and the influence of geomorphology in a headwater catchment, central eastern Cascades, Washington

    Creator:
    Alley, David
    Abstract:
    This report presents a nested gauging study of streamflow variability from three sub-catchments (150-200 ha in area) of the Burns Creek catchment (565 ha) in the Entiat Experimental Forest of central Washington State. We test and reject the hypothesis that headwater catchments of this size are composed of physically and...
    Resource Type:
    Capstone Project
    Full Text:
    . Abstract Approved: __________________________________________________________ Jeffrey J. McDonnell

  • Ecohydrological mediation of water budget partitioning and time scales of subsurface flow in a seasonally semi-arid grassland

    Creator:
    Pangle, Luke A.
    Abstract:
    Understanding how the interactions and feedbacks between plant function, climate, and soils ultimately affects the terrestrial water balance and subsurface flow processes is major challenge in scientific hydrology. This dissertation summarizes the findings of a manipulative climate warming experiment, an observational field study that utilized stable-isotope tracers, and associated modeling...
    Resource Type:
    Dissertation
    Full Text:
    : ________________________________________________________________________ Jeffrey J. McDonnell Understanding how the interactions and feedbacks between plant

  • Beyond the paired-catchment approach : isotope tracing to illuminate stocks, flows, transit time, and scaling

    Creator:
    Hale, V. Cody
    Abstract:
    This dissertation integrates a process-based hydrological investigation with an ongoing paired-catchment study to better understand how forest harvest impacts catchment function at multiple scales. We do this by addressing fundamental questions related to the stocks, flows and transit times of water. Isotope tracers are used within a top-down catchment intercomparison...
    Resource Type:
    Dissertation
    Full Text:
    : _____________________________________________________________________ Jeffrey J. McDonnell This dissertation integrates a process-based hydrological

  • The role of bedrock groundwater in rainfall-runoff response at hillslope and catchment scales

    Creator:
    Gabrielli, Christopher P.
    Abstract:
    Bedrock groundwater dynamics in headwater catchments are poorly understood and poorly characterized. Direct hydrometric measurements have been limited due to the logistical challenges associated with drilling through hard rock in steep, remote and often roadless terrain. Here we develop and use an inexpensive, portable bedrock drilling system to explore bedrock...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ Jeffrey J. McDonnell Bedrock groundwater dynamics in headwater catchments are poorly

  • Hillslope hydrology : from patterns to processes

    Creator:
    Tromp-van Meerveld, Hilda J.
    Abstract:
    This dissertation re-examines the now standard perceptual model of hillslope hydrological response to rainfall, which includes the growth of a saturated wedge at the soil-bedrock interface or impeding layer. It also challenges the notion of bedrock impermeability and the assumption that the pattern of subsurface stormflow is determined by the...
    Resource Type:
    Dissertation
    Full Text:
    : ________________________________________________________________________ Jeffrey J. McDonnell This dissertation re-examines the now standard perceptual model of

  • Water residence time and runoff generation in the western Cascades of Oregon

    Creator:
    McGuire, Kevin J.
    Abstract:
    The age, or residence time of water is a fundamental descriptor of catchment hydrology, revealing information about the storage, flow pathways and source of water in a single integrated measure. While there has been tremendous recent interest in residence time to characterize catchments, there are few studies that quantify residence...
    Resource Type:
    Dissertation

  • Hydro-biogeochemical coupling at the hillslope and catchment scale

    Creator:
    van Verseveld, Willem J.
    Abstract:
    The specific objectives of this dissertation are to determine subsurface flow behaviors across different antecedent wetness conditions from a top-down perspective and to mechanistically assess the hydrological controls on DOC and N transport at the hillslope and catchment scale. The study area is a small catchment where hillslopes issue directly...
    Resource Type:
    Dissertation
    Full Text:
    approved:______________________________________________________ Jeffrey J. McDonnell The specific

  • Measurement and modeling the physical controls of snowmelt in the Pacific Northwest

    Creator:
    Mazurkiewicz, Adam B.
    Abstract:
    The physical controls of snowmelt in the Pacific Northwest (PNW) are poorly understood. While there have been numerous field and modeling investigations at the plot and watershed scale, few studies have identified how the snow energy balance (EB) components vary in importance both spatially and temporally. The identification of how...
    Resource Type:
    Masters Thesis
    Full Text:
    Northwest Abstract approved: —————————————————————————————————— Jeffrey J. McDonnell The

  • Trickle-down ecohydrology : complexity of rainfall interception and net precipitation under forest canopies

    Creator:
    Allen, Scott T.
    Abstract:
    Rainfall interception is a primary control over the moisture input to a forested ecosystem through the partitioning of precipitation into throughfall, stemflow, and an evaporated component (i.e. the interception loss). Rainfall interception is a spatially and temporally varying process at multiple scales, but heterogeneity in interception processes are poorly understood...
    Resource Type:
    Masters Thesis
    Full Text:
    __________________________________ Barbara J. Bond Jeffrey J. McDonnell Rainfall interception is a primary control over

  • The role of near-stream zones on flow, chemistry and isotopic composition at the headwater scale

    Creator:
    Frentress, Jay
    Abstract:
    Stream discharge is a key water balance component and important factor in global change evaluations. Nevertheless, the mechanisms for streamflow generation are poorly understood. Near- stream surface saturation during precipitation events is one of the most iconic, visible indicators of rapid runoff production in upland humid catchments around the world....
    Resource Type:
    Dissertation
    Full Text:
    : ________________________________________________________________________________________ Jeffrey J. McDonnell Stream discharge is a key water balance component and important factor in