Index Catalog // ScholarsArchive@OSU

Reducing sediment production from forest roads during wet-weather use

Creator:: Toman, Elizabeth Myers
Abstract:: Forest roads produce fine sediment with traffic during wet weather. If the forest road is connected to a stream it can be a source of turbidity and fine sediment that may be detrimental to aquatic organisms especially salmonids. The goal of this work was to investigate turbid runoff during wet-weather...
Resource Type:: Dissertation
Full Text:: Philosophy in Forest Engineering and Civil Engineering presented August 3, 2007. Title: Reducing Sediment

Problems of Shape and Information in Multiscale Modeling of Transport Phenomena

Creator:: Ostvar, Sassan
Abstract:: This work is a compilation of problems that deal with multiscale analysis of transport phenomena in environmental systems. A common feature among the problems studied here is the presence of non-negligible microscale structure in various forms. Each problem is approached from the perspective that a macroscopic observable encodes aspects of...
Resource Type:: Dissertation
Full Text:: cubic (fcc) disk array, bidisperse disk array, and monodisperse simple-cubic ellipse array with

Vortical Structures in Transition to Turbulence through Randomly Packed Porous Media: Scale, Energy, and Mixing Characteristics

Creator:: Mohammadi Ziazi, Reza
Abstract:: Vortical structures are the driving mechanism of transition to turbulence in porous media requiring adequately resolved observations along with analysis of the scale and energy of ﬂow within the pores. Of speciﬁc interest is to understand the vortex dynamics, energy, and turbulent mixing and transport properties in the scale of...
Resource Type:: Dissertation
Full Text:: the scaling rela- tionship for velocity and length. . . . . . . . . . . . . . . . . . . . . 88 3.16

Signatures in the Subsurface - Big & Small Data Approaches for the Spatio-Temporal Analysis of Geologic Properties & Uncertainty Reduction

Creator:: Rose, Kelly Kathleen
Abstract:: Despite more than two centuries of exploration, including more than six million deep wellbores with depths exceeding 40,000 feet in some parts of the world, our ability to constrain subsurface processes and properties remains limited. Characteristics of the subsurface vary and can be analyzed on a variety of spatial scales....
Resource Type:: Dissertation
Full Text:: significant thanks and appreciation to my coworkers at the U.S. Department of Energy’s National Energy

Temporal and spatial variability of groundwater nitrate in the southern Willamette Valley of Oregon

Creator:: Mutti, Jeffrey Glenn
Abstract:: Groundwater nitrate contamination is a well-documented issue in the Southern Willamette Valley (SWV) of Oregon, as a Groundwater Management Area (GWMA) has recently been declared. As a GWMA, groundwater nitrate monitoring must occur until regional concentrations are below 7 mg/L NO3-N. However, the presence of temporal variability can make it...
Resource Type:: Masters Thesis

Hybrid Multiscale Methods with Applications to Semiconductors, Porous Media, and Materials Science

Creator:: Costa, Timothy B.
Abstract:: In this work we consider two multiscale applications with tremendous computational complexity at the lower scale. First, we examine a model for charge transport in semicon- ductor structures with heterojunction interfaces. Due to the complex physical phenomena at the interface, the model at the design scale is unable to adequately...
Resource Type:: Dissertation
Full Text:: . My time at Sandia National Laboratories, while not directly related to this thesis, was nonetheless

Uranium and technetium bio-immobilization in intermediate-scale physical models of an in situ bio-barrier

Creator:: Michalsen, Mandy M.
Abstract:: Metal and hydrogen ion acidity and extreme nitrate concentrations typical of Department of Energy (DOE) legacy waste sites pose formidable challenges to successful implementation of in situ bio-immobilization. Intermediate-scale (~ 2.5 m), flow through models of an in situ bio-barrier were constructed to investigate U and Tc removal from groundwater...
Resource Type:: Dissertation
Full Text:: with scientists at major research universities and national research laboratories. For example, iron

Towards the Development of Performance-Based Concrete Mixtures Made with Modern Cementitious Materials Using Thermodynamic Modeling

Creator:: Bharadwaj Ravi, Keshav
Abstract:: This thesis builds on a modeling tool that has been developed to link thermodynamic modeling and concrete performance. This tool is intended to predict the performance for modern concrete mixtures made with ordinary portland cement (OPC), conventional and novel supplementary cementitious materials (SCMs), and limestone (Ls). The first part of...
Resource Type:: Dissertation

Quantitative, multi-spectral, light-transmission imaging of colloid transport in porous media at the meso scale

Creator:: Kraft, Erika Lorna
Abstract:: Colloids, particles smaller than ten microns in diameter, are ubiquitous in the subsurface. Colloids have an effect on the transport of contaminants that bind to their surfaces, and can reduce the permeability of aquifer materials through deposition. Some microorganisms, including pathogens, are also transported in the subsurface as colloids. The...
Resource Type:: Dissertation
Full Text:: , and their friendship. I thank the National Science Foundation (NSF) IGERT Subsurface Biosphere

ScholarsArchive@OSU

Reducing sediment production from forest roads during wet-weather use

Problems of Shape and Information in Multiscale Modeling of Transport Phenomena

Vortical Structures in Transition to Turbulence through Randomly Packed Porous Media: Scale, Energy, and Mixing Characteristics

Signatures in the Subsurface - Big & Small Data Approaches for the Spatio-Temporal Analysis of Geologic Properties & Uncertainty Reduction

Temporal and spatial variability of groundwater nitrate in the southern Willamette Valley of Oregon

Hybrid Multiscale Methods with Applications to Semiconductors, Porous Media, and Materials Science

Uranium and technetium bio-immobilization in intermediate-scale physical models of an in situ bio-barrier

Towards the Development of Performance-Based Concrete Mixtures Made with Modern Cementitious Materials Using Thermodynamic Modeling

Quantitative, multi-spectral, light-transmission imaging of colloid transport in porous media at the meso scale

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