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Changes In Floodplain Inundation Under Non-Stationary Hydrology For An Adjustable, Alluvial River Channel, Bruce C. Call

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Predicting the frequency and aerial extent of flooding in river valleys is essential for infrastructure design, environmental management, and risk assessment. Such flooding occurs when the discharge of water within a river channel exceeds its maximum capacity and the extra water submerges the adjoining floodplain surface. The maximum capacity of a channel is controlled by its geometry, gradient, and frictional resistance. Conventional flood prediction methods rely on assumptions of unchanging flood probabilities and channel capacities. However, changes in climate, land cover, and water management have been shown to systematically shift the magnitude and variability of flood flows in many systems. …

Evaluating The Effectiveness Of Utah Farm Field Days, Paige Wray

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Utah farm field day events seek to increase agricultural literacy among elementary students. Although these events are occurring statewide, no formal evaluation has been conducted to determine student increases in agricultural literacy related to these events. The purpose of this study was to evaluate two such events to see what students knew about agriculture before they attended the farm field day, what they wanted to learn about concerning agriculture, and what they learned after attending the event. Results showed that these children were below average for expected grade level understandings or agricultural awareness before the event. However, after the event, …

Modeling And Projection Of The North American Monsoon Using A High-Resolution Regional Climate Model, Jonathan D.D. Meyer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The North American Monsoon (NAM) is a dominant climate feature across the southwestern United States and Mexico during the summertime. Rainfall from the NAM elicits a significant response from the regional ecology as well as supports the socioeconomic well-being of both rural and urban populations. Due to the large variability in the yearly intensity and location of where the NAM rainfall occurs, the region is highly susceptible to prolonged and exceptional periods of drought; compounded by significant population growth projections through the 21st century. Reliable prediction for the NAM is highly beneficial on timescales ranging from shortterm weather forecasting to …

Nitrogen Excretion Of Lactating Dairy Cows Fed An Alfalfa Hay- Or Birdsfoot Trefoil Hay-Based High-Forage Diet, Mohammad Ghelich Khan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Legumes that contain condensed tannins (CT) may have lower protein degradability than alfalfa. The present study investigated the effects of feeding birdsfoot trefoil (Lotus corniculatus L.) hay on lactation performance and N utilization. Eight multiparous Holstein cows in mid lactation (150 ± 22.3 d-in-milk) were randomly assigned to 1 of 2 rations [alfalfa hay-based TMR (AHT) or birdsfoot trefoil hay-based TMR (BFTT)] in a crossover design with 2 experimental periods. Each experimental period lasted 16 d (14 d of adaptation and 2 d of total collection), and the 2 experimental periods were separated by a 7-d washout period. In the …

The Short And Long-Term Effects Of Temperature And Strain On A Concrete Bulb-Tree Girder Bridge, Ethan Pickett

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Utah Transportation Center (UTC) as well as the Mountain Plains Consortium, sponsored a study to investigate the long-term performance of a deck bulb tee girder bridge. The bridge in question is located in Nibley, Utah and was erected in early 2016. Temperature and prestress losses were analyzed from embedded instrumentation placed within two of the bridge girders before casting. These two girders contained a total of 50 thermocouples and 16 vibrating wire strain gauges. These instruments were placed at the mid-span and end of an exterior girder and the mid-span, quarter-span, and end of a center girder in order …

Redefining Landscape Norms: Exploring The Influence Of Normative Landscaping Patterns In Washington County, Utah, Ryan White

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As water supplies in the American West become increasingly strained by growing populations and threats of drought and climate change, water managers and governments are working to maximize water-use efficiency. With well over half of municipal water being used on outdoor irrigation, improved landscape water efficiency has been a clear candidate for conservation messaging. Because social norms play a significant role in what conservation behaviors individuals adopt voluntarily, conservation messaging strategies often try to influence and shift norms in favor of improved behaviors. A clear understanding of the existing norms, demographics, and cultural values of an area is essential to …

Pharmaceuticals And Personal Care Products In An Effluent-Dominated Stream: Seasonal Variability And Downstream Fate, Bradley R. Buswell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Pharmaceuticals and personal care products (PPCPs) consist of a large group of compounds including medicines, lotions, soaps, shampoos, and even flame retardants and insect repellants. After use, PPCPs often enter waste streams that are directed to municipal wastewater treatment plants (WWTPs). Due to inefficient removals in conventional wastewater treatment processes, WWTP discharges into streams and rivers are a major source of PPCPs to the environment.

The East Canyon Water Reclamation Facility (ECWRF) is a WWTP in Park City, Utah. After treatment, the ECWRF effluent is discharged into a small constructed wetland area before it enters East Canyon Creek. Due to …

Investigating Patterns Of Fluvial Form And Incision Near The Yellowstone Hotspot — Alpine Canyon Of The Snake River, Wyoming, Daphnee Tuzlak

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The shape of a landscape is created by rivers, which erode the underlying bedrock and carve through mountains. The Snake River flows across the uplifting hotspot plume of the Yellowstone region, cuts through the Snake River Range, and ultimately enters the low-lying eastern Snake River Plain. Although there is a good understanding of the track of the Yellowstone hotspot over geologic time and shorter timescales, measurements over Quaternary timescales and an understanding of how uplift influences the rivers and landscape in the Yellowstone region are absent. We study the Snake River and its past deposits where it cuts through Alpine …

Effects Of Variable And Changing Environments On Demography: Inferences From A Lesser Snow Goose Colony, David T. Iles

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The mean and variability of environmental conditions have changed as a result of human activity, and continued changes are predicted. The strongest effects on natural populations will often be channeled through species interactions, as shifts in species range limits and life cycle schedules will shift in relation to each other. These changes will often impact rates of survival, growth, and reproduction simultaneously, and these effects will likely differ across habitats.

In chapter 2, I used mathematical modeling and computer simulations to investigate the evolutionary significance of increasingly variable environments, and examine how evolutionary pressures change when multiple vital rates are …

Molecular And Physiological Mechanisms Of Toxin Resistance In Toad-Eating Snakes, Shabnam Mohammadi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many plants and animals are defended by toxic compounds, and circumvention of those defenses often has involved the evolution of elaborate mechanisms for tolerance or resistance of the toxins. Toads synthesize potent cardiotonic steroids known as bufadienolides (BDs) from cholesterol and store those toxins in high concentrations in their cutaneous glands. Those toxins protect toads from the majority of predators, including most snakes that readily consume other species of frogs. BDs exert their effect by inhibiting ion transport by the Na⁺/K⁺-ATPase (NKA). This ubiquitous transmembrane enzyme consists of a catalytic alpha-subunit, which carries out the enzyme's …

Determining Natural Frequencies Using Embedded And Placed Sensors Under Ambient And Shaker Excitation, Tyson Scott Alder

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Structural Health Monitoring (SHM) includes methods of detecting damage to structures over their lifespan. Using the structure’s dynamic characteristics, internal damage and other changes can be detected and defined. Dynamic characteristics are affected by many operational parameters, particularly temperature effects. By defining the operational condition of a healthy structure, changes from the baseline condition can be detected and defined as damage. Defining the operational characteristics of the structure are imperative to detecting damage.

This study focused on defining the baseline dynamic properties of the recently constructed Nibley Bridge using embedded sensors. Multiple tests were performed to provide a range of …

Anatomy Of A Rupture: Identity Maintenance In The 1844 Latter-Day Saint Reform Sect, Robert M. Call

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Joseph Smith, the founder of The Church of Jesus Christ of Latter-day Saints, managed dissent throughout his prophetic career. Most of the earliest dissenters came and went with little lasting impact on Mormonism—the church maintained a coherent structure despite attempted disjuncture. However, when Smith was assassinated in June 1844 (just fourteen years after he established the church), the Mormon community ruptured. Claimants to Smith’s ecclesiastical office competed for church-wide leadership. Brigham Young led thousands westward to the Rocky Mountains, but thousands of Mormons rejected Young and his version of Mormonism. This crisis over succession sparked the growth of schisms in …

Public Opinion On Renewable Energy: The Nexus Of Climate, Politics, And Economy, Shawn K. Olson-Hazboun

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This dissertation research examines the factors underlying public opinion toward renewable energy in the United States. U.S. citizens in general support the continued development of renewable energy, yet opposition has been widely observed toward a variety of renewable energy facilities at the local level. Previous research on public responses to renewable energy has focused on one or a small number of communities experiencing renewable energy development. In this research I examine public views more broadly, in communities with and without renewable energy development, and also using nationally representative opinion data. I ask the following questions:

What local experiences influence how …

Maximum Likelihood Temperature/Emissivity Separation Of Hyperspectral Images With Gaussian Distributed Downwelling Radiance, David A. Neal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Hyperspectral images are made up of energy measurements at different wavelengths of light. The case is considered where these measurements are dependent on temperature, the self-emitted energy (emissivity), and reflected energy (downwelling radiance) from the surroundings. The process where the downwelling radiance is fixed and the temperature and emissivity are estimated is referred to as temperature/emissivity separation.

Due to the way these terms mix, for a given set of measurements, there exist many pairs of temperatures and emissivities that satisfy the model. This creates ambiguity in the solution that must be resolved for the result to have any significance.

A …

Parent Perspectives On Preparing Students With Intellectual Disabilities For Inclusive Postsecondary Education, Jeff C. Sheen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

More and more students with intellectual disabilities (ID) have the opportunity to participate in a college experience by attending an inclusive postsecondary education program specifically designed to support these students. The goal of these programs is to help students with ID improve their opportunities to find employment that matches their interests, live more independently and enjoy a higher quality of life. To get the most out of their college experience, students with ID need to develop certain personal skills, knowledge, and attributes that will help them be better prepared for a college-based program. The parents of students with ID that …

Modeling De Novo Granulation Of Anaerobic Sludge, Honey Varghese

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The global market for biological waste water treatment is large and growing. Bioengineered reactor setups employ microorganisms to degrade waste and produce useful/less harmful components. Scientists are interested in studies that reveal the biological mechanisms involved in the process of these microbial actions in order to improve the reactor performance. The process of granulation in aerobic sludge is one such interesting process which is less explained.

The primary goal of the thesis is to design a computational model that simulates the process of granulation in anaerobic sludge and that addresses the role physiochemical and biological processes play in granule formation. …

Sequence Stratigraphy, Chemostratigraphy, And Biostratigraphy Of Lower Ordovician Units In Northeastern And Western Central Utah: Regional Implications, Colter R. Davis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Lower to Middle Ordovician Garden City Formation and Pogonip Group are mixed carbonate and sandy marine rocks deposited on the western margin of ancestral North America. The Garden City Formation was deposited in the Northern Utah Basin and the Pogonip Group was deposited in the Ibex Basin. These two basins experienced different rates of subsidence that resulting in significant thickness differences between rock units and different rock types related to sea level change. This study provides a unique opportunity to examine changes in rock types, rock chemistry, and fossil types as sea level changed within two separate basins in …

The Performance Of A Bioenergetics Model In A System With An Abundant Population Of Salmonids: A Case Study Of Cutthroat Trout In The Logan River, Utah, Martha L. Jensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Widespread habitat degradation and fragmentation has significantly altered the distribution and abundance of salmonids across the Western United States. To effectively conserve these fish, managers need tools to evaluate habitat quality in physically diverse streams and watersheds. Traditionally, habitat assessment for stream fish has focused on the physical characteristics of sites. Thus, such research has often overlooked important biological factors, such as the availability of prey or the presence and abundance of competitors or predators. In recent years, however, researchers have considered habitat from both physical and biological dimensions.

Bioenergetics models offer a way to combine the both the biotic …

Alternative Treatment Technologies For Low-Cost Industrial And Municipal Wastewater Management, Alan J. Hodges

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Roughly the same volume of water that rushes over the Niagara Falls is produced as wastewater in North America. This wastewater is treated through a variety of means to ensure that it can be safely returned to the natural ecosystem. This thesis examines two novel means for this treatment, one biological and one physical-chemical in nature, namely, Rotating Algae Biofilm Reactor treatment and expanded shale augmented coagulation-flocculation.

Rotating algae biofilm reactors (RABRs) support biofilm algae growth, and in turn, the algae take up harmful contaminants from the wastewater. This system was tested in wastewater from petroleum refining operations. The efficacy …

Algae-Based Biofilm Productivity And Treatment Of Dairy Wastewater: Effects Of Temperature And Organic Carbon Concentration, Zachary T. Fica

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Production of dairy and associated products is a source of millions of gallons of wastewater every year. Water used in cleaning feeding stalls as well as the liquid component of the animal waste are two of the major volumetric components of this wastewater. This water is nutrient rich, often limiting the viability as a land applied fertilizer. However, these same nutrients could be used as an inexpensive feedstock for the cultivation of algae, which can then be used to produce downstream products including animal feed and aquaculture.

As part of this study, algal biomass was cultivated on dairy wastewater from …

Effectiveness Of Acceptance And Commitment Therapy As A Treatment For Posttraumatic Stress Disorder And Moral Injury, Ellen J. Bluett

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Posttraumatic stress disorder (PTSD) is a common condition among military personal and veterans. Despite strong empirical support for first line treatments for PTSD, many veterans do not complete or respond to treatment. Research suggests that experiential avoidance is a contributing factor to both treatment dropout and minimal treatment gains. Acceptance and commitment therapy (ACT) is an empirically supported cognitive behavioral intervention that aims to decrease experiential avoidance while increasing psychological flexibility. Research has shown ACT to be a promising intervention for the treatment of PTSD; however, its effectiveness in veterans with PTSD is limited.

In conjunction with Utah State University …

The Influence Of Wind Energy Development On Columbian Sharp-Tailed Grouse (Tympanuchus Phasianellus Columbianus) Breeding Season Ecology In Eastern Idaho, Matthew C. Proett

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Columbian sharp-tailed grouse (Tympanuchus phasianellus columbianus; CSTG) has experienced range-wide population declines, primarily as a result of habitat loss or degradation, and currently occupies <10% of its historic range. Expansion of wind energy developments across the remaining occupied CSTG range has been identified as a potential threat to the species. To assess the potential influence of wind energy development of CSTG breeding season ecology, I captured and radio-marked 135 female CSTG drugin 2014-2015 at leks located between 0.1-13.8 km from wind turbines in restored grassland habitats. Using radio-telemetry, I monitored 147 nests and 68 broods and developed models to assess the influence of wind turbines, roads, habitat features temporal factors, and precipitation on CSTG nest site selection, nest survival, brood success, and chick survival. Female CSTG in my study selected nest sites in grassland habitats where >30% of the canopy cover in the nesting core use area was composed of forbs (i.e., broadleaf plants). The strength of selection for this habitat type increased as its availability increased on the landscape. Nest survival increased with higher visual obstruction readings (i.e., concealment) at the nest bowl and in grassland habitats where forb cover exceeded 30% in the nesting core use area. I did not detect an influence of wind turbines or …

Shallow Bones, Brian Lee Cook

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The research for this thesis examined historical and recent events embodying persecution both directed towards and perpetuated by the Mormon church. In order to convey the complexity of persecution, I examined stories told by church members, accounts written during the early years of the religion, and scholarly pieces written about the church's history. These stories revolved around the assassination of Joseph Smith and the Mountain Meadows massacre.

To portray the events surrounding the Mountain Meadows massacre, I performed a site visit, documented scenery, and discussed the massacre with others visiting the site. The great majority of my Mountain Meadows descriptions …

Spatio-Temporal History Of Fluid-Rock Interaction In The Hurricane Fault Zone, Jace Michael Koger

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Hurricane Fault is a 250-km long, west dipping, active Basin and Range-bounding normal fault in southwest Utah and northwest Arizona. There are multiple known hot springs along its 250-km length and multiple late Tertiary-Quaternary basaltic centers that broadly parallel the fault. Possible sources of hot spring fluids include deeply circulated meteoric water that experienced water-rock exchange at high temperatures (>100 °C) and deep-seated crustal fluids. Abundant damage zone veins, cements, and host rock alteration are present along strike, indicative of past fluid flow. Carbonate veins and cements are key features of the Hurricane Fault zone, and the primary …

Eportfolio Adoption's Mediating Influence On Faculty Perspectives: An Activity Theory View, Jonathan M. Thomas

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A case-comparative mixed methods approach was used to discover how faculty members’ teaching perspectives changed as they adopted an eportfolio tool (Pathbrite). Ten faculty members took the Teaching Perspectives Inventory (TPI) before and after using the tool during Fall semester 2015. Also, systems logs were collected and interviews were conducted after the post survey was completed. Interview data found that faculty members developed a broader view of the potential of eportfolios. Participants also appreciated the long-term benefits that eportfolios would have on their students. However, when use was associated with accreditation standards, gains in student-centered perspectives were minimal. The study …

International Policy Diffusion And Religious Freedom, 1990-2008, Allison R. Hale

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Why do governments restrict religious freedom? As more and more governments have adopted restrictive policies over the past thirty years, scholars have traditionally examined internal domestic factors—such as the role of democratic governance, economic growth, or internal competition—that may influence government choices. I build on this literature by extending the discussion to external factors, arguing that some policies may also spread from one government to another. This process, identified by scholars as the idea of policy diffusion, may occur in several ways.

While previous research has focused on the spread of policies that are generally considered positive (i.e. the spread …

Magmatic Evolution Of Early Subduction Zones: Geochemical Modeling And Chemical Stratigraphy Of Boninite And Fore Arc Basalt From The Bonin Fore Arc, Emily A. Haugen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Izu-Bonin-Mariana arc stretches south from Japan to Guam in the Western Pacific. International Ocean Discovery Project Expedition 352 drilled four core in the fore arc of the Izu-Bonin arc east of the Bonin Islands: U1439C, U1440B, U1441A, and U1442A. From the four core, 124 samples were retrieved and analyzed for major and trace elements. Two main rock types were identified: FAB and boninite. FAB is a Mid-Ocean Ridge Basalt (MORB)-like tholeiite with variable fluid mobile element enrichment such as Rb, Ba, and Sr, and low Ti/V ratios more similar to an island arc volcanic than a mid-ocean ridge volcanic. …

The Influence Of Threatened State Preemption On City Council Voting Behavior And Municipal Broadband, Dillon P. Corbridge

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The relationship between city and state government has been contentious at times throughout American history. Cities only have the legal authority granted to them by state government, yet many cities have cause to seek policy that may not be in the interest of those who govern the state. Leaders of American states may choose to preempt municipal authority by removing the legal power of a city to perform certain actions. While preemption provides states with a tool for regulating the policies and practices that cities may pursue, it is unclear whether city leaders act cautiously to avoid preemption, or instead …

A Stochastic Model For Water-Vegetation Systems And The Effect Of Decreasing Precipitation On Semi-Arid Environments, Shannon A. Dixon

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Current climate change trends are affecting the magnitude and recurrence of extreme weather events. In particular, several semi-arid regions around the planet are confronting more intense and prolonged lack of precipitation, slowly transforming these regions into deserts. Many mathematical models have been developed for purposes of analyzing vegetation-water interactions, particularly in semi-arid landscapes. Most models are based on the average behavior of the system as a whole, and how it is influenced by external changes. These models may be termed "macro-scale" models. Other models have concerned themselves with the interactions between individuals, in this case the interactions between individual plants …

Spatiotemporal Evolution Of Pleistocene And Late Oligocene-Early Miocene Deformation In The Mecca Hills, Southernmost San Andreas Fault Zone, Amy C. Moser

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Seismogenically active faults (those that produce earthquakes) are very complex systems that constantly change through time. When an earthquake occurs, the rocks surrounding a fault (the “fault rocks”) become altered or damaged. Studying these fault rocks directly can inform what processes operated in the fault and how the fault evolved in space and time. Examining these key aspects of faults helps us understand the earthquake hazards of active fault systems.

The Mecca Hills, southern California, consist of a set of hills adjacent to the southernmost San Andreas Fault. The topography is related to motion on the San Andreas fault, which …