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Filtering by: Creator Mu��oz-Amatria��n, Maria Remove constraint Creator: Mu��oz-Amatria��n, Maria Academic Affiliation Crop and Soil Science Remove constraint Academic Affiliation: Crop and Soil Science

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  • The Effects of Biofilm on Sandy Soil Hydrology

    Creator:
    Runion, Danielle N.
    Abstract:
    It is known that soil biota affects water dynamics through various complex mechanisms. The impact on retention by soil biota are due to a combination of changes to pore geometry, pore clogging by biofilms, biofilms that serve to connect thin water films across many pores as the soil dries, and...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Danielle N

  • Solarization in the Pacific Northwest: A Mathematical Field Model for Accumulation of Linearized Mortality from Variable Intermittent Heat

    Creator:
    Hill, Brian C.
    Abstract:
    Soil solarization trials were conducted during the growing seasons of 2016-2018 with the purpose of determining if solarization was an effective pre-planting soil disinfestation technique for tree nurseries in the Pacific Northwest. A large data set was collected on soil properties and biological indicators from 5 interdisciplinary experiments. This thesis...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Maria Ines Dragila Soil solarization trials were conducted during the growing seasons of 2016

  • Exploring mechanisms that drive the development of reversible soil hydrophobicity

    Creator:
    Woolverton, Priscilla B.
    Abstract:
    This study focuses on one widespread characteristic of poor soil quality: hydrophobic soil. Previous research has produced conclusive evidence to show that soil hydrophobicity is affected by soil organic matter (SOM) and soil water content (WC). Hydrophobicity that responds to changes in WC is a unique form of surface hydrophobicity...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Maria I. Dragila Markus Kleber This study focuses on one

  • Evaporation from bare soil and soil cracks: a numeric study

    Creator:
    Graham, Christopher Brian
    Abstract:
    Evaporation from bare soil was investigated using a numeric model In one set of simulations, texture and evaporative demand were analyzed as they impacted short and long term evaporation. The effect of these factors on water redistribution was also analyzed. A second set of simulations was run to determine the...
    Resource Type:
    Masters Thesis
    Full Text:
    . Title: Evaporation from Bare Soil and Soil Cracks: A Numeric Study Abstract approved: Maria Ines

  • Evaporation synergy in a bi-textured soil system

    Creator:
    Fisher, Arthur J.
    Abstract:
    Evaporation synergy is the phenomenon in which two porous medium textures that share a common vertical boundary experience a higher cumulative evaporation than either homogeneous texture can produce. Studies that have been conducted to date address this phenomenon in relatively fine and coarse sands but not in finer textured soils...
    Resource Type:
    Masters Thesis
    Full Text:
    : Maria I. Dragila Evaporation synergy is the phenomenon in which two porous medium textures that share

  • Plot-Scale Field Investigation : Characterizing Water Motion in Sandy Agricultural Soils

    Creator:
    Nolasco, Stephanie M.
    Abstract:
    Irrigated agricultural production in sandy soils presents several unique challenges to growers, including naturally high permeability, low native water retention, as well as high rates of water drainage losses and leaching of chemicals to the shallow aquifers. This study is an initial investigation into water motion in the sandy agricultural...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: ______________________________________________________ Maria I. Dragila

  • Hydrological consequences of two native shrubs in semi-arid Senegal : patterns, processes, concepts and methods

    Creator:
    Kizito, Fred
    Abstract:
    Water availability is a critical limiting element in semi-arid ecosystem productivity and presents particular challenges in Sahelian countries such as Senegal. The landscapes are characterized by the presence of two common semi-arid shrubs (Piliostigma reticulatum and Guiera senegalensis), both of which may be important hydraulic regulators in these water-limited ecosystems....
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: Redacted for Privacy Maria Ines Dragila Water availability is a critical limiting

  • Migration of E. coli and solutes to tile drains via preferential and matrix flow

    Creator:
    Moreno, Daniel
    Abstract:
    The extent of agricultural drainage has created concern for its potential undesirable effects on surface water quality. Land applications of liquid manure on tile drain fields have the potential to transport solutes and bacteria to the drains following precipitation or irrigation events and many times are directly sent to a...
    Resource Type:
    Masters Thesis
    Full Text:
    to Tile Drains via Preferential and Matrix Flow. Abstract approved: Maria I. Dragila The extent of

  • The effect of burrowing mammals on the hydrology of a drained riparian ecosystem

    Creator:
    Cassidy, James Richard
    Abstract:
    Many species of rodents and insectivores live in subterranean burrows in soils throughout the world. The soil surface perforations of burrow entrances are often connected to complex, subsurface tunnel networks. Burrow entrances and associated subsurface tunnel networks represent a link between surface and subsurface ecological function. Anecdotal observations of surface-water...
    Resource Type:
    Masters Thesis
    Full Text:
    Mammals on the Hydrology of a Drained Riparian Ecosystem. Abstract approved Maria I. Dragila Many

  • Calcium Ion Transport via Seeping Flow Events through Epikarst Microfissures

    Creator:
    Windom, Lisa M.
    Abstract:
    Solute transport models in karst groundwater must consider variable and complex flow regimes. Within fissures less than 2 mm in aperture, during unsaturated flow events, seeping flow may flow as films or under capillary tension as a capillary rivulet. This project focuses on exploring the mass transport characteristics of seeping...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Maria Dragila John Selker Solute