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As Arizona enters its fifteenth year of drought and Lake Mead hits historic lows, water management and policy planning will become increasingly important to ensure future water security in the Southwestern region of the United States. This thesis compares water demand trends and policies at the municipal level in Phoenix and Tucson, Arizona over the time period from 1980-2010. By analyzing gallons per capita per day (GPCD) trends for each city in the context of population growth, drought, and major state and local policies over the twenty year period, reasons for declines in per capita water demand were explored. Despite differences in their available water sources and political cultures, both the City of Phoenix and the City of Tucson have successfully reduced their per capita water consumption levels between 1980 and 2010. However, this study suggests that each city's measured success at reducing GPCD has been more a result of external events (supply augmentation, drought, and differing development trends) rather than conservation and demand reduction regulations adopted under the auspices of the Groundwater Management Act.
ContributorsSnyder, Rachel Claire (Author) / Larson, Kelli (Thesis director) / Hirt, Paul (Committee member) / Barrett, The Honors College (Contributor) / School of International Letters and Cultures (Contributor) / School of Sustainability (Contributor) / School of Politics and Global Studies (Contributor)
Created2015-05
Description
Terrestrial crude oil spills compromise a soil’s ability to provide ecosystem services by inhibiting plant life and threatening groundwater integrity. Ozone gas, a powerful oxidant, shows promise to aid in soil recovery by degrading petroleum hydrocarbons into more bioavailable and biodegradable chemicals. However, previous research has shown that ozone can change the soil pH and create harmful organic compounds.
The research objective was to determine the short-term ecological toxicity of ozonation byproducts on seed germination of three distinct plant types (radish, lettuce, and grass) compared to untreated and uncontaminated soils. We hypothesize that the reduction of heavy hydrocarbon contamination in soil by ozone application will provide more suitable habitat for the germinating seeds. The effect of ozone treatment on seed germination and seedling quality was measured using ASTM standards for early seedling growth in conjunction with a gradient of potting soil amendments. Ozonation parameters were measured using established methods and include total petroleum hydrocarbons (TPH), dissolved organic carbon (DOC), and pH.
This study demonstrated the TPH levels fall up to 22% with ozonation, suggesting TPH removal is related to the amount of ozone delivered as opposed to the type of crude oil present. The DOC values increase comparably across crude oil types as the ozonation dose increases (from a background level of 0.25 g to 6.2 g/kg dry soil at the highest ozone level), suggesting that DOC production is directly related to the amount of ozone, not crude oil type. While ozonation reduced the mass of heavy hydrocarbons in the soil, it increased the amount of ozonation byproducts in the soil. For the three types of seeds used in the study, these changes in concentrations of TPH and DOC affected the species differently; however, no seed type showed improved germination after ozone treatment. Thus, ozone treatment by itself had a negative impact on germination potential.
Future research should focus on the effects of post-ozonation, long-term bioremediation on eco-toxicity. By helping define the eco-toxicity of ozonation techniques, this research can improve upon previously established ozone techniques for petroleum remediation and provide economic and environmental benefits when used for soil treatment.
The research objective was to determine the short-term ecological toxicity of ozonation byproducts on seed germination of three distinct plant types (radish, lettuce, and grass) compared to untreated and uncontaminated soils. We hypothesize that the reduction of heavy hydrocarbon contamination in soil by ozone application will provide more suitable habitat for the germinating seeds. The effect of ozone treatment on seed germination and seedling quality was measured using ASTM standards for early seedling growth in conjunction with a gradient of potting soil amendments. Ozonation parameters were measured using established methods and include total petroleum hydrocarbons (TPH), dissolved organic carbon (DOC), and pH.
This study demonstrated the TPH levels fall up to 22% with ozonation, suggesting TPH removal is related to the amount of ozone delivered as opposed to the type of crude oil present. The DOC values increase comparably across crude oil types as the ozonation dose increases (from a background level of 0.25 g to 6.2 g/kg dry soil at the highest ozone level), suggesting that DOC production is directly related to the amount of ozone, not crude oil type. While ozonation reduced the mass of heavy hydrocarbons in the soil, it increased the amount of ozonation byproducts in the soil. For the three types of seeds used in the study, these changes in concentrations of TPH and DOC affected the species differently; however, no seed type showed improved germination after ozone treatment. Thus, ozone treatment by itself had a negative impact on germination potential.
Future research should focus on the effects of post-ozonation, long-term bioremediation on eco-toxicity. By helping define the eco-toxicity of ozonation techniques, this research can improve upon previously established ozone techniques for petroleum remediation and provide economic and environmental benefits when used for soil treatment.
ContributorsJanuszewski, Brielle (Author) / Rittmann, Bruce (Thesis director) / Yavuz, Burcu (Committee member) / Civil, Environmental and Sustainable Eng Program (Contributor) / School of International Letters and Cultures (Contributor) / School of Politics and Global Studies (Contributor, Contributor) / School of Life Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
Description
Immigration policy in the United States today is complex and far-encompassing. This project aims to present it in an easily accessible way: Through the eyes of those who have experienced its effects in a deeply personal manner. This online project, housed at http://immigrant-experience.com/, includes profiles of four people who have immigrated to the United States from other countries. The website includes graphics and multimedia elements, that help to tell their stories. It also provides information about immigration statistics, research and policy. The DREAMer who came to the country as a child, the young Mexican man on a seasonal visa, and the Eritrean refugee share in the immigrant experience, but the effects of U.S. policy on their lives are vastly different. Factors at play include age, education, country of origin and socioeconomic status. These factors are what shape the policy that dictates whether an immigrant can become an American citizen. They are also what make Gloria, Adrian and Azarya's stories so unique. It is a multitude of personal stories that collectively define the immigrant experience. These stories may be drastically different, depending on the country of origin and circumstances of each individual, but some aspects of the experience are shared. The difficulties inherent in uprooting oneself from a familiar community are common to "immigrants" of all shapes and sizes: students moving out of state for college, new hires moving to a new city, parents moving their children into a better neighborhood, etc. Through in-depth profiles of immigrants from a wide variety of backgrounds, this project highlights those shared experiences while showing the diversity of personal stories, challenging contemporary stereotypes about immigrant populations.
ContributorsMiller, Faith Anne (Author) / Rodriguez, Rick (Thesis director) / Manning, Jason (Committee member) / Walter Cronkite School of Journalism and Mass Communication (Contributor) / School of International Letters and Cultures (Contributor) / Department of English (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
This report describes the technology, benefits, and deployment of autonomous vehicles and how they are expected to impact the insurance industry, specifically collision coverage policies. A pure premium trend analysis is done to come up with a realistic prediction of how the frequency and severity of vehicle collisions will change over time. Two additional scenarios are done to address the fact that there is still uncertainty surrounding the timing of the implementation of AVs. Lastly, the risks that come with AVs are discussed along with potential risk mitigation strategies.
ContributorsMullenmeister, Morgan (Author) / Zhou, Hongjuan (Thesis director) / Milovanovic, Jelena (Committee member) / Zicarelli, John (Committee member) / Barrett, The Honors College (Contributor) / School of Mathematical and Statistical Sciences (Contributor) / School of International Letters and Cultures (Contributor)
Created2022-12
Description
Major urban centers are warming due to a combination of global and local phenomena. City governments are increasingly adopting strategies to mitigate the causes and impacts of extreme heat on their populations. Among these strategies are high solar-reflectance (cool) surfaces installed on building roofs and walls. Use of cool surfaces is a cost-effective and simple strategy that replaces conventional darker surfaces with surfaces that have a high reflectance to shortwave (solar) energy.
This report reviews the recent history of cool-surface deployment efforts. This includes peer-reviewed literature, conference proceedings, and grey literature to identify challenges and barriers to wide-scale deployment of cool surfaces. We have also researched heat action plans and programs from cities and different codes and standards, as well as available incentive and rebate programs.
The review identifies challenges, barriers, and opportunities associated with large-scale deployment of cool surfaces and categorizes them broadly as being related to product development & performance or policies & mandates. It provides a foundation upon which we intend to build a roadmap for rapidly accelerating future deployments of cool surfaces. This roadmap will address identified challenges and incorporate lessons learned from historical efforts to generate a practical and actionable plan.
ContributorsAlhazmi, Mansour (Author) / Sailor, David (Author) / Levinson, Ronnen (Author)
Created2023-05-24
Description
My thesis is a comprehensive, multi-page report highlighting the ethical concerns of Arizona’s English-only law, or Proposition 203. It will emphasize the detrimental effects the law has on bilingualism, language preservation, and educational equity. To do this, I will explore research on the benefits of bilingualism for cultural awareness, brain development, and career opportunities. The project will underscore the importance of embracing linguistic diversity in the public education system in Arizona. My report will provide some background on the topic by delving into the historical context and intentions behind the English-only law. This will essentially expose to readers the misguided attempts of the law, some of which include boosting test scores at the expense of genuine learning experiences. I will include information that supports my argument that Proposition 203 discourages bilingualism and strips impactful opportunities from students in the public education system. Additionally, anecdotes and personal opinions from educators will be included to strengthen my argument. By highlighting the ethical implications of prioritizing test outcomes over holistic education, my thesis aims to advocate for a shift towards inclusive, more immersive bilingual education models.
ContributorsErramuzpe, Sophia (Author) / Sipka, Danko (Thesis director) / Amrein-Beardsley, Audrey (Committee member) / Barrett, The Honors College (Contributor) / Department of Psychology (Contributor) / School of International Letters and Cultures (Contributor)
Created2024-05