Search Constraints

Start Over
Filtering by: Creator Steenhuis, Tammo S. Remove constraint Creator: Steenhuis, Tammo S. Committee Member Dragila, Maria Remove constraint Committee Member: Dragila, Maria

Search Results

  • Determining contact angle of solutions with varying surface tension on dry and pre-wetted silica sands

    Creator:
    McGinnis, Thomas L.
    Abstract:
    Infiltration of highly concentrated solutions into unsaturated sand is suspected to be affected by the liquid-gas interfacial tension between the resident water and that of the infiltrating solution. The wetting of non-porous solid surfaces by liquids is commonly quantified by contact angle measurements. However, it is well known that wettability...
    Resource Type:
    Masters Thesis
    Full Text:
    and Pre-wetted Sili Abstract approved: John S/Selker ;urface Tension on Infiltration of highly

  • Evaluation of bioluminescence as a measure of bacterial cell density in porous media

    Creator:
    Uesugi, Sandra L.
    Abstract:
    Salicylate-induced, lux gene dependent bioluminescence was measured using a cooled charge-coupled device (CCD) camera to evaluate its potential as a quantitative measurement of cell density of Pseudomonas fluorescens HK44 in porous media. The CCD camera was able to detect bioluminescence from cell densities between 1x10⁶ and 1x10⁸ cells/ml in both...
    Resource Type:
    Masters Thesis
    Full Text:
    unamended control, 250 mg/L glucose (G), 250 mg/L glucose and 100 mg/L salicylate (S) and 100 mg/L

  • Exploring Colloid Transport in Unsaturated Porous Media Using X-Ray Microtomography

    Creator:
    Brueck, Chris L.
    Abstract:
    Understanding the mechanisms controlling colloid transport and deposition in the vadose zone is an important step in protecting our water resources. Colloid transport in unsaturated porous media was studied using X-Ray Microtomography (XMT), which is a non-destructive imaging technique that provides three-dimensional images at a resolution on the order of...
    Resource Type:
    Masters Thesis
    Full Text:
    ) 0.5 mL/hr column (S=0.94), (b) 5.0 mL/hr column (S=0.96), (c) 50.0 mL/hr column (S=0.96), (d) 0.5 mL

  • Flow processes in the dry regime : the effect on capillary barrier performance

    Creator:
    Jansik, Danielle P.
    Abstract:
    Engineered capillary barriers typically consist of two layers of granular materials designed so that the contrast in sediment hydrologic properties and sloping interface retains infiltrating water in the upper layer. We report here on the results of two bench-top capillary barrier experiments, and associated modeling. These experiments were conducted to...
    Resource Type:
    Masters Thesis
    Full Text:
    . Steenhuis et al. (1991) further specified that breakthrough would not occur until pressures in the

  • 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:
    hydrological model, Hydrol. Earth Syst. Sci., 11(2), 983-995. Eagleson, P. S. (2002), Ecohydrology