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- Creators: Arizona State University
Pluvial Flood Risk Modeling, Assessment, and Management under Evolving Urban Climates and Land Cover
Description
Pluvial flooding is a costly, injurious, and even deadly phenomenon with which cities will always contend. However, cities may reduce their risk of flood exposure by changing historically dominant patterns of development that have removed natural landscape features and reduce the damages that flooding causes by identifying and supporting vulnerable populations. Accomplishing either goal requires the development and application of appropriate frameworks for modeling or recording flood exposure. In this dissertation, I used modeling and surveying methods for assessing pluvial flood exposure in two cities, first in Valdivia, Chile, and then in Hermosillo, México. I open with a summary on pluvial flood risk in the present day and the threat it may pose under changing climates. In the second chapter, I explored how a form of urban ecological infrastructure (UEI), the wetland, is being wielded in Valdivia toward pluvial flood mitigation, and found that wetland daily, seasonal, and interannual changes in wetland surface and soil water storage alter pluvial flood risk in the city. In the third chapter, I used a mixed methodology, including projections of future land cover generated by cellular automata models with inputs from visioning workshops conducted by the Urban Resilience to Extremes Sustainability Research Network (UREx SRN), and found that wetland loss in future land configurations may lead to increased pluvial flood risk. In the fourth chapter, I combined these land cover models from the third chapter with downscaled climate data on precipitation, also generated by the UREx SRN, and found that wetland conservation can help to mitigate the pluvial flood risk posed by changing patterns of rainfall. In the fifth chapter, I applied the Arc-Malstrøm method for pluvial flood assessment in Hermosillo, México, and compared it with the more traditional rational method for flood assessment, and through accompanying surveys found that perception of flood risk is significantly affected by flood dimensions and impacts. This dissertation concludes with a synthesis of pluvial flood risk assessment, suggestions for improvements to modeling, as well as suggestions for future research on pluvial flood risk assessment in cities. This dissertation advances the understanding of the utility of inland wetland UEI in cities under present and future land cover and climate conditions. It also qualifies the utility of common and new pluvial flood risk assessments and offers research directions for future pluvial flood assessments.
ContributorsSauer, Jason R (Author) / Grimm, Nancy B (Thesis advisor) / Chester, Mikhail V (Committee member) / Cook, Elizabeth M (Committee member) / Childers, Daniel L (Committee member) / Eakin, Hallie (Committee member) / Arizona State University (Publisher)
Created2022
Description
Hotline crisis counselors witness trauma in others, leaving them vulnerable to compassion fatigue and burnout. Vicarious resilience can counterbalance the harmful effects of trauma work and help individuals avoid vicarious traumatization. This dissertation examined four research questions constructed to explore the lived experiences of child abuse hotline crisis counselors over thirty-six months, both before and during the COVID-pandemic. Furthermore, the recent implementation of text and chat, in addition to a traditional phone call, has ushered in new issues of abuse and concern brought on by the pandemic (i.e., isolation, fear of sickness and death, employment, housing and childcare insecurities, school closures, remote work, divisive custody issues related to masks and vaccines). Using a phenomenological methodology, this study draws upon three years of focus group data (2019, 2020, & 2021). Six focus groups were conducted with twenty-six hotline counselors over the three years to address the research questions that explore the counselors’ professional experiences before and during the pandemic. Analysis of the focus group transcriptions included a single-year analysis that looked at each year and a cross-year analysis to look at themes generated by analyzing all years together. Themes of resilience, workspace, and healing found that the hotline counselors shared positive experiences and personal growth from their work with implications of advocating for self-care not as an individual issue but as a larger collective issue among counselors. The results of this study will advance the concept of vicarious resilience, trauma-informed practices, and, most importantly, sustaining, and empowering helping professionals in challenging times.
ContributorsDiaz, Marisol Juarez (Author) / Swadener, Beth B (Thesis advisor) / Lopez, Vera (Committee member) / Ayers, Stephanie (Committee member) / Arizona State University (Publisher)
Created2022
Description
Producing, transforming, distributing, and consuming food requires a multitude of actors, from the microbes in the soil to the truck drivers, from the salesperson to the bacterial life that supports digestion. Yet, the global food system – far from being neutral – unequally provides and extracts resources around the globe to serve and protect the needs of some, while excluding and/or oppressing others and producing trauma in the process. Drawing on feminist scholarship and permaculture research – two fields that discuss the importance of care but only rarely work together – and using social science methods, I explore how to integrate care into food systems, and what are the outcomes of such an integration. I first bring together the voices of 35 everyday experts from Cuba, France, and the United States (Arizona) and perspectives from ethics of care, creation care, indigenous scholars, and permaculture specialists, and I use grounded theory to develop a definition of care in food systems context, and a conceptual map of care that identifies motives for caring, caring practices and their results. I then discuss how caring practices enhance food systems’ adaptive capacity and resilience. Next, I study the relationship between a subset of the identified caring practices – what is recognized as “Earth care” – and their effect on well-being in general, and Food Well-Being more specifically, using three case studies from Arizona based on: (1) interviews of school teachers, (2) interviews of sustainable farmers, (3) a survey with 96 gardeners. There, I also discuss how policies and cultural transformations can better support the integration of Earth care practices in food systems. Then, I examine how urban food autonomy movements are grassroots examples of integration of care in food systems, and how through their care practices – Earth care, “People care” and “Fair share” – they can serve as a catalyst for social change and contribute to the achievement of the United Nations Sustainable Development Goals. Lastly, I conclude with recommendations to strengthen a culture of care in food systems, as well as limitations to my research, and future research directions.
ContributorsGiraud, Esteve Gaelle (Author) / Aggarwal, Rimjhim (Thesis advisor) / Cloutier, Scott (Thesis advisor) / Samuelson, Hava (Committee member) / Chhetri, Netra (Committee member) / Arizona State University (Publisher)
Created2022
Description
This quasi-experimental, mixed-methods action research study explored perceived levels of resilience for academic and peer-related settings among sixth-grade females in an independent middle school. A 5-week after-school intervention aimed to provide treatment participants with the opportunity to foster resilience by utilizing grit, growth mindset, and mindfulness practices. Pre and postsurveys (n = 26) completed by treatment and control groups showed that sixth-grade females experience a number of different academic and peer-related stressors with some of the most common stressors including bad grades in a class and feeling left out by peers. Survey findings also showed that treatment and control participants rated themselves highest in areas of flexibility for both peer and academic settings. Treatment and control participants rated themselves lowest on questions related to self-efficacy and emotional regulation in both peer and academic settings. While there were not statistically significant increases in perceived levels of resilience found for the treatment group pre- and post-intervention, interviews with treatment participants (n = 16) and workshop artifacts indicated that students found the exercises taught in the intervention helpful to navigate academic and peer related stressors they encounter. Implications for practice and research are discussed.
ContributorsDudley, Katherine Signaigo (Author) / Harris, Lauren M (Thesis advisor) / Borman, Geoffrey (Committee member) / Anaya, Sasha (Committee member) / Arizona State University (Publisher)
Created2022
Description
Despite the technical competence of Information and Communication Technology (ICT) graduates of the Department of Computer Science (DCS) at the University of Guyana, stakeholders’ perception generally holds that they lack affective and behavioural (soft) skills. These soft skills are expected of them to lead and champion technological change in Guyana. This dissertation addresses the question of what is understood about, and how meaning and sense are made of, the concept of ‘ICT graduate employability’, in the context of the local public sector, by the key stakeholders: employers (government), and alumni (graduates) and lecturers (educators) of the DCS. On account of the cyclic, incremental, reflective nature of Action Research (AR) and its tenet of integrating theory with practice, an AR project was undertaken to develop a deep local understanding about ICT graduate employability. This understanding has implications for how ICT graduates are prepared as a function of their programme of study in the DCS and how their performance and careers are managed in the public sector. The research comprised one reconnaissance study (Cycle 0), an intervention-based study (Cycle 1), and a qualitative study (Cycle 2). The focus and direction of Cycle 2 were refined by insights garnered from Cycles 0 and 1. Cycle 2 employed surveys, interviews, and focus groups to elicit the perceptions, views, opinions, experiences, values, and framing ideas and beliefs of a sample of forty participants. Thematic analysis was used to identify patterns and develop themes in the process of analysing and interpreting the data. The findings unearthed a local definition of ICT graduate employability; revealed implications of environmental factors in the public sector for the psychological safety and resilience of ICT graduates; and informed recommendations for a locally relevant ICT graduate education ecosystem.
ContributorsWilliams, Malcolm Maxwell (Author) / Fischman, Gustavo E (Thesis advisor) / Basile, Carole G (Committee member) / Thomas, Troy D (Committee member) / Arizona State University (Publisher)
Created2023
Description
The trend of increasing mental health issues for undergraduate students is a worrisome and important topic for research in higher education. College students become the backbone of society as they graduate, start families, and enter the workforce. To increase the mental health of students on campus, many institutions have implemented university-wide interventions that ask students to engage with written or visual models. I propose that this large-scale intervention that uses a one-size-fits all narrative is leaving behind important students on campus who do not relate to the written or video narratives that are often used in these settings. My current research employed a classroom-based intervention in which students were asked to discover intergenerational narratives themselves. This mixed methods design used pre-intervention and post-intervention surveys to investigate changes in levels of resilience, belonging, and mattering among a group of college students at a university in the southwest United States. My sample was predominantly young (m = 19.4, SD = 1.2) female students (85.7%) who identified as white (54%) and in their freshman year of college (48.6%). Additional qualitative thematic analyses were performed to investigate the adherence of student narratives to restorative elements and representative quotes were pulled to elaborate on the convergence and divergence of data. Although no statistically significant differences were found, individual students reported positive change and future research is warranted.
ContributorsWhetten, Jason LaMont (Author) / Weinberg, Andrea (Thesis advisor) / Smith, Stephanie (Committee member) / Dunbar, Nora (Committee member) / Arizona State University (Publisher)
Created2022
Description
Although adverse events cannot always be prevented, the negative outcomes on development can potentially be modified by considering methods of fostering positive emotional and behavioral responses. The study examined biopsychosocial health outcomes in the presence of uncontrollable adverse childhood events with the goal of identifying a potential intervention to increase resilience, health, and safe behaviors among at-risk children. It was hypothesized that adverse events can result in positive biopsychosocial outcomes in the presence of high scores on the Positive Emotion, Engagement, Relationships, Meaning, and Accomplishments (PERMA) model of well-being, self-efficacy, gratitude, and the ability to envision a positive future self. The study retrospectively examined adverse childhood events and present behavioral, emotional, and physical health outcomes. Participant (n = 685) data were analyzed using Hayes PROCESS (v3.5) to test all components of the moderation model. Results suggest that as adverse events increase, health adversity also increases. However, those with high intrapersonal strengths showed better health outcomes. Through understanding intrapersonal pathways in the presence of adverse events, the study can potentially identify mechanisms important for promoting resilient outcomes in childhood that could cascade into adulthood.
ContributorsBraunstein, Bailey Marie (Author) / Mickelson, Kristin (Thesis advisor) / Hall, Deborah (Committee member) / Lindstrom-Johnson, Sarah (Committee member) / Arizona State University (Publisher)
Created2022
Description
Traditional infrastructure design approaches were born with industrialization. During this time the relatively stable environments allowed infrastructure systems to reliably provide service with networks designed to precise parameters and organizations fixated on maximizing efficiency. Now, infrastructure systems face the challenge of operating in the Anthropocene, an era of complexity. The environments in which infrastructure systems operate are changing more rapidly than the technologies and governance systems of infrastructure. Infrastructure systems will need to be resilient to navigate stability and instability and avoid obsolescence. This dissertation addresses how infrastructure systems could be designed for the Anthropocene, assessing technologies able to operate with uncertainty, rethinking the principles of technology design, and restructuring infrastructure governance. Resilience, in engineering, has often been defined as resistance to known disturbances with a focus on infrastructure assets. Resilience, more broadly reviewed, includes resistance, adaptation, and transformation across physical and governance domains. This dissertation constructs a foundation for resilient infrastructure through an assessment of resilience paradigms in engineering, complexity and deep uncertainty (Chapter 2), ecology (Chapter 3), and organizational change and leadership (Chapter 4). The second chapter reconciles frameworks of complexity and deep uncertainty to help infrastructure managers navigate the instability infrastructure systems face, with a focus on climate change. The third chapter identifies competencies of resilience in infrastructure theory and practice and compares those competencies with ‘Life’s Principles’ in ecology, presenting opportunities for growth and innovation in infrastructure resilience and highlighting the need for satisficed (to satisfy and suffice) solutions. The fourth chapter navigates pressures of exploitation and exploration that infrastructure institutions face during periods of stability and instability, proposing leadership capabilities to enhance institutional resilience. Finally, the dissertation is concluded with a chapter synthesizing the previous chapters, providing guidance for alternative design approaches for advancing resilient infrastructure. Combined, the work challenges the basic mental models used by engineers when approaching infrastructure design and recommends new ways of doing and thinking for the accelerating and increasingly uncertain conditions of the future.
ContributorsHelmrich, Alysha Marie (Author) / Chester, Mikhail V (Thesis advisor) / Grimm, Nancy B (Committee member) / Garcia, Margaret (Committee member) / Meerow, Sara (Committee member) / Arizona State University (Publisher)
Created2021
Description
Our children come to school every day to learn, participate, and prepare for what the future will bring. Others come to school to find refuge and help from those who dedicate their lives to ensure they are well and safe. They come with their minds filled with hopes and dreams, while others walk around the hallways with their hearts filled with despair and uncertainty. Despite collaborative district efforts and improvements in student services, students continue to experience trauma related symptoms and other mental disorders at disconcerting rates. The school district reports that approximately 98% of students have experienced traumatic episodes and half of these students presented with significant distress from symptoms of Post-Traumatic Stress Disorder (Loudenback, 2016). At this school, approximately 25% of the student body has been referred, identified and treated for socio-emotional difficulties. These rates are often higher in students with learning disabilities participating in different academic programs. This action research study was conducted to evaluate how and to what extent does implementation of a resilience-based curriculum affect students’ resilience, Posttraumatic Stress Disorder (PTSD) symptoms, attitudes toward school and efficacy for coping. This project was implemented over ten consecutive weeks in an urban middle school in East Los Angeles to a group of twenty students in special education. The intervention consists of ten modules each with activities and strategies designed to raise the students’ resilience and overall well-being. Resilience Theory and Social Cognitive Theory provide the framework for understanding the problem of practice and informing the intervention. Research along with professional observations regarding the vulnerability of students in special education coupled with the lack of evidence-based practices that assist in their emotional development inspired this project. This action research relied on an explanatory sequential design where qualitative results explained and supported the results from the quantitative data. Following the explanatory design, quantitative data was collected analyzed followed by qualitative data upon completion of the intervention. Data collected from web-based surveys and focus groups demonstrate that their participation in the resilience-based intervention increased their resilience, more specifically self-efficacy and problem solving skills while reducing PTSD symptoms. Results also showed students improved their attitudes toward school and ability to cope with stress. Quantitative and qualitative data merging, interpretation, and relation to both theory and research are discussed along with the study’s limitations, implication for research and practice, and concluding thoughts.
ContributorsDussan, Francisco Jose (Author) / Gee, Elizabeth (Thesis advisor) / Wolf, Leigh (Committee member) / Elsasser, Jim (Committee member) / Arizona State University (Publisher)
Created2021
Description
In past decades, adverse childhood experiences (ACEs) rapidly gained attentionas a public health crisis due to dose-response relationships with a range of health and
social problems, and early mortality. Converging studies show that ACEs are a pandemic
in the general population of the United States—even in middle to upper-middle class
families that are considered to be ‘better off’. There have been collaborative efforts in
public health to target root-causes of childhood adversity and increase resilient
adaptation in individuals and families at risk. Due to the importance of fostering positive
adaptation in the midst of adversity, this dissertation sought to examine both
vulnerability and protective factors in children’s proximal ecology—e.g., parents and
caring adults at school. A population-based study in this dissertation revealed that
parents’ emotional well-being, measured as negative feelings toward parenting, greatly
influences developing children, so as support and resources for parenting. The presence
of caring adults as a protective factor in teens with highly competitive settings—a newly
identified at-risk group due to high pressure to achieve and internalizing/externalizing
problems. Lastly, this dissertation discusses conceptual and methodological limitations
in current ways of measuring ACEs and provide future directions for research, practice,
and policy. Suggestions include frequent assessments on reaching consensus on how to
define ACEs, expanding the concept of ACEs, considering the duration, timing, and
severity of the event. Healthcare professionals have important roles in public health;
they incorporate frequent assessments on parents’ emotional wellbeing and needs for
parenting as a part of care. Ongoing support from multiple disciplines is necessary to
reduce the impact of ACEs and strengthen resilience development of children and
families.
ContributorsSuh, Bin (Author) / Luthar, Suniya (Thesis advisor) / Pipe, Teri (Thesis advisor) / Castro, Felipe (Committee member) / Arizona State University (Publisher)
Created2022