Digital Commons Network^™

Analyzing Dam Feasibility In The Willamette River Watershed, Alexander Cameron Nagel

Dissertations and Theses

This study conducts a dam-scale cost versus benefit analysis in order to explore the feasibility of each the 13 U.S. Army Corps of Engineers (USACE) commissioned dams in Oregon’s Willamette River network. Constructed between 1941 and 1969, these structures function in collaboration to comprise the Willamette River Basin Reservoir System (WRBRS). The motivation for this project derives from a growing awareness of the biophysical impacts that dam structures can have on riparian habitats. This project compares each of the 13 dams being assessed, to prioritize their level of utility within the system. The study takes the metrics from the top …

Grassroots Resistance In The Sustainable City: Portland Harbor Superfund Site Contamination, Cleanup, And Collective Action, Erin Katherine Goodling

Dissertations and Theses

How does progressive change happen in so-called sustainable cities? In this dissertation, I present findings from a three year-long ethnographic investigation of grassroots organizing in Portland, Oregon, a city at the leading edge of the green urbanism movement. This research centered on an extended case study of the Portland Harbor Community Coalition (PHCC). PHCC is an alliance of grassroots groups working to ensure that cleanup of the Portland Harbor Superfund Site benefits those who have been most impacted by pollution. In this dissertation, I develop three main empirical findings. First, despite depoliticized (sustainability) discourse permeating the harbor cleanup planning process, …

Using Critical Physical Geography To Map The Unintended Consequences Of Conservation Management Programs, Melanie Malone

Dissertations and Theses

A variety of conservation trends have gained and lost favor throughout the years in agriculture, with U.S. Farm Bills often influencing what conservation practices are implemented by farming communities throughout the U.S. This dissertation focuses on the unintended consequences of conservation management practices in the Fifteenmile Watershed of Wasco County, Oregon. Specifically, I seek to address how farmer enrollment in various conservation techniques, loosely defined as no-till agriculture, has affected soil and water quality through the increased use of herbicide, and subsequently rendered ecological and human health vulnerable. Using a critical physical geography framework, I address both the biophysical factors …

Incorporating Place And Space: A Hierarchical Spatial Approach To Exploring Preventable Congestive Heart Failure Hospitalizations In New York City, Rachael Weiss Riley

Dissertations and Theses

Background: Faced with rising medical care costs, increasing prevalence, and widening health disparities, preventing congestive heart failure (CHF) hospitalizations is a central public health concern. Despite evidence of geographical clustering in preventable CHF admissions, there is a lack of research designed to examine spatial patterning of CHF and the local area neighborhood determinants that contribute to this variability. This study sought to assess and evaluate the importance of both space and place in analyzing preventable CHF hospitalizations and readmissions by applying appropriate statistical techniques, clarifying the assumption inherent in each method, and interpreting the findings within the context of existing …

Wicked Water Problems: Can Network Governance Deliver? Integrated Water Management Case Studies From New Zealand And Oregon, Usa, Jacqueline Dingfelder

Dissertations and Theses

Integrated water management is a wicked public policy problem with no clear path to resolution. This dissertation is an in-depth qualitative comparative analysis of two collaborative governance processes created to tackle complex water problems in New Zealand and Oregon, U.S.A. Both cases convened a wide range of state and non-state actors in efforts to find common ground, build consensus for change, and develop innovative water policy solutions.

The goal of this comparative case study analysis is to gain a better understanding of collaborative network governance frameworks as applied to integrated water management and primary factors for success. The proposition posits …

The Force Of Manhood: The Consequences Of Masculinity Threat On Police Officer Use Of Force, Aurelia Terese Alston

Dissertations and Theses

Positive community-police relations, which are based on mutual trust, are key to equitable and just policing. Use of force that is perceived as unfair and biased can quickly undermine relations between the police and the public. In an attempt to understand what psychological factors contribute to police use of force decisions and potentially racially biased use of force application, this study proposed masculinity threat as an important psychological factor that influences police behavior. Masculinity threat occurs when a man's status as a man is threatened, and threats to masculinity are often associated with increased aggression and dominance as a way …

Food Access Narratives In Southeast Portland, Oregon, Gwyneth Genevieve Mckee Manser

Dissertations and Theses

Since the late 1990's, "food deserts" have dominated the academic and policy literature on food access and food security. Food deserts are defined as areas that lack easy access to fresh, healthy, and affordable food, and are typically measured using Geographic Information Systems and spatial data sets. However, while food deserts may provide a useful measure for identifying food insecurity at a broad scale, they fail to account for individual definitions and perceptions of food access (Barnes et al. 2015; McEntee 2009). Furthermore, the food desert model assumes a lack of agency on the part of low-income populations (Alkon et …

A Numerical Model Investigation Of The Role Of The Glacier Bed In Regulating Grounding Line Retreat Of Thwaites Glacier, West Antarctica, Michael Scott Waibel

Dissertations and Theses

I examine how two different realizations of bed morphology affect Thwaites Glacier response to ocean warming through the initiation of marine ice sheet instability and associated grounding line retreat. A state of the art numerical ice sheet model is used for this purpose. The bed configurations used are the 1-km resolution interpolated BEDMAP2 bed and a higher-resolution conditional simulation produced by John Goff at the University of Texas using the same underlying data. The model is forced using a slow ramp approach, where melt of ice on the floating side of the grounding line is increased over time, which gently …

The Effects Of Scale Variation On Single-Family Residential Water Use In Portland, Or, Matthew Ryan Lee Bonnette

Dissertations and Theses

With growing urban populations and increasing concerns over the effects of climate change on water supplies, there has recently been a significant amount of interdisciplinary research focused on identifying the drivers of urban water use. Due to unavailability of individual or household level data, these studies are often limited to using spatially aggregated data. There is concern that this aggregation of data may be leading to misrepresentations of the drivers of urban water use, yet there have been few studies that have addressed this concern. As in all spatial quantitative analyses, studies in this area should consider how the spatial …

Regulating Pavement Dwellers: The Politics Of The Visibly Poor In Public Space, Lauren Marie Larin

Dissertations and Theses

Many researchers argue the increasing reliance on sit/lie ordinances to regulate homeless people's use of public space is one in a suite of neoliberal policies that shape the geographies of public space in cities to serve the needs of global capital. However, these policies are developed at the local, not global, level as specific actors make claims in the public sphere that communicatively shape policy formation. Through comparative case study, this research asks, how do different actors, situated in specific local and global contexts, influence the adoption of sit/lie ordinances?

I examine two cases of policymaking in Portland and San …

Feasibility In Applying Agile Project Management Methodologies To Building Design And Construction Industry, Roy S. Moriel

Dissertations and Theses

During the past few decades, fundamental changes have taken place in project development, planning, and execution. This has taken form with embracing new techniques such as various agile project management methodologies to develop products, instead of using the traditional waterfall project management methodology commonly used today. Using agile has been very successful as a large portion of the IT world has integrated it within their companies. Unfortunately, professional fields such as the building design and construction industry have remained mostly with the traditional methods impacting the projects in terms of cost, scheduling, and other project elements that can benefit from …

Effects Of Spatially Distributed Stream Power On Check Dam Function In Small Upland Watersheds: A Case Study Of The Upper Laja Watershed, Guanajuato, Mexico, Zachary Andrew Herzfeld

Dissertations and Theses

Watershed restoration comes in a variety of forms depending on which set of problems are sought to be remedied. Severe soil erosion, in the form of gullying and/or headcutting, can be mitigated through constructing check dams in well-selected locations. This practice has been used throughout the upland subwatersheds within the Upper Laja River watershed in Guanajuato, México. The present study employed Wolman pebble counts to systematically assess the effectiveness of 21 check dams located near the city of San Miguel de Allende. Particle size distributions taken directly downstream and upstream of each check dam were differentiated, aggregated and compared--with the …

Out In "The Numbers": Youth And Gang Violence Initiatives And Uneven Development In Portland's Periphery, Dirk Kinsey

Dissertations and Theses

Incidence of youth and gang violence in the Portland, Oregon metro area has increased dramatically over the past five years. This violence has recently become more spatially diffuse, shifting outwards from gentrified, inner city neighborhoods, towards the city's periphery. These incidents exist within the context of a shifting regional political economy, characterized by a process of gentrification associated displacement and growing, and distinctly racialized and spatialized, inequalities. While gang researchers have long argued a corollary between the emergence of gangs and economically and culturally polarized urban landscapes, the ongoing suburbanization of poverty in American cities suggests a new landscape of …

Public Art Between Authoritarianism And Democracy (The Case Of The Maidan Protest In Ukraine), Asia Bazdyrieva

Dissertations and Theses

This thesis explores the spatial organization and public art of Kyiv’s Independence Square to address broader social and political realities after the Maidan protests of 2013-14. Using theories of power and ideology, this study demonstrates how the discourse on public art reflects the political situation of post-revolutionary Ukraine, and how public engagement with urban space signals a paradigmatic shift in the developing country’s process of self-identification. The purpose of this thesis is threefold: first, to identify the Soviet ideological approach embedded in the spatial organization of Kyiv’s administrative center (including the Maidan); second, to examine artistic interventions at the site …

Nature Versus Culture: Lower Manhattan Land Art By Charles Simonds, Walter De Maria, And Alan Sonfist, Farrar Fitzgerald

Dissertations and Theses

No abstract provided.

The Deprivatization Of Art: Dan Graham As An Art Worker, Jordana Cotilletta

Dissertations and Theses

No abstract provided.

Hidden History: The Role Of Great Britain In The American Civil War As Told By Cultural Artifacts, Mary Griffiths

Dissertations and Theses

What do statues and songs tell us about the Civil War? If the monuments are in the United States – a marker on a battlefield for instance- it is easy to decipher the context and historical significance. Soldiers passed their time with song and their lyrics are preserved to this day, performed by both pop artists and living historians. But what if these cultural artifacts reside outside the United States? Why is there a statue of Abraham Lincoln in the city of Manchester? How does a monument dedicated to the martyrs at the Lune Street Riots on Preston, Lancashire relate …

The Political Water Web Of The United States, Omar Hammad

Dissertations and Theses

The United States’ water systems are interstate in their nature; these systems are governed by Congressional compact agreements. Water compacts have been influenced by common factors that have reverberated throughout the water-web of the country. These impacts varied in their scale, national level federal regulations, such as the Endangered Species Act of 1973, and recent concerns about climate change are macro-scale influences. Localized drivers such as regional economics and population change are localized impacts. While these concepts and issues influence water compacts as a whole, their impacts occur at different periods, albeit for the same reason. As such, we see …

2d Vector Map And Database Design For Indoor Assisted Navigation, Luciano Caraciolo Albuquerque

Dissertations and Theses

In this paper we implemented a 2D Vector Map, map editor and Database design intended to provide an efficient way to convert cad files from indoor environments to a set of vectors representing hallways, doors, exits, elevators, and other entities embedded in a floor plan, and save them in a database for use by other applications, such as assisted navigation for blind people.

A graphical application as developed in C++ to allow the user to input a CAD DXF file, process the file to automatically obtain nodes and edges, and save the nodes and edges to a database for posterior …

The Effects Of Frequency Of Social Interaction, Social Cohesion, Age, And The Built Environment On Walking, Gretchen Allison Luhr

Dissertations and Theses

The purpose of this dissertation was to explore, through a social ecological framework, the multifaceted effects of the neighborhood environment by investigating how dimensions of both the built environment and the neighborhood social context may interact to influence walking. Aesthetics, land use mix, crime, and pedestrian infrastructure were considered with respect to built environment walkability, and the neighborhood social context was conceptualized using measures of both social cohesion and social interaction with neighbors. This research used data from an Environmental Protection Agency (EPA)-funded study of 748 adults (18 years of age and older) residing in the Lents neighborhood in Portland, …

Citizen-Led Urban Agriculture And The Politics Of Spatial Reappropriation In Montreal, Quebec, Claire Emmanuelle Bach

Dissertations and Theses

Urban Agriculture (UA) has been practiced in Montreal, Quebec for well over a century. In the last five years or so, a renewed enthusiasm for UA has manifested itself in the form of citizen-led UA projects. The latter are often established in residual spaces, from vacant lots to sidewalks, and alleyways. These more spontaneous and informal UA practices point to a shift in how urban inhabitants perceive and use urban space. Through a case study of informal UA projects in Montreal, QC, this work brings attention to the dynamics surrounding the establishment of citizen-led UA projects, paying special attention to …

Unmanned Aerial Vehicle Based Structure From Motion Biomass Inventory Estimates, Emily Jane Bedell

Dissertations and Theses

Riparian vegetation restoration efforts demand cost effective, accurate, and replicable impact assessments. In this thesis a method is presented using an Unmanned Aerial Vehicle (UAV) equipped with a GoPro digital camera to collect photogrammetric data of a 2.02-acre riparian restoration. A three-dimensional point cloud was created from the photos using Structure from Motion (SfM) techniques. The point cloud was analyzed and compared to traditional, ground-based monitoring techniques. Ground truth data collected using the status-quo approach was collected on 6.3% of the study site and averaged across the entire site to report stem heights in stems/acre in three height classes, 0-3 …

Surviving Catastrophe: Resource Allocation And Plant Interactions Among The Mosses Of Mount St. Helens Volcano, Trevor David Williams

Dissertations and Theses

Mosses are some of the first colonizers to disturbed sites, yet their roles in early plant community structuring are not well understood. The primary succession zones of volcanoes provide opportunities to conduct natural experiments into how mosses contribute to early plant community formation, as well as how the unique environments found in such zones affect plant traits, particularly those associated with stress tolerance. Though plant community changes have been well-documented since Mount St. Helens (MSH) volcano erupted in 1980, the volcano's moss assemblages, their influence on other plants, and their potential roles in chemical-mediated competition and biogeochemical cycling have garnered …

Configuring The Urban Smart Grid: Transitions, Experimentation, And Governance, Anthony Michael Levenda

Dissertations and Theses

In the face of challenges of energy security, decarbonization, resilience, and the replacement of aging infrastructure systems, federal, state, and local actors are facilitating the development of smart electricity networks to transition towards a more sustainable electricity system. In the United States, development of "smart grids" is being pursued as a national policy mandate and goal, promising that the deployment of smart grid technologies -- referring in general to digital information and communication technologies that sense, monitor, control and manage the electric grid -- will make electricity systems more environmentally sustainable and reliable, and at the same time, provide opportunities …

Community Schools: A Public Health Opportunity, Catherine Diamond

Dissertations and Theses

Community schools link students, families, and communities to educate children and strengthen neighborhoods. They have become a popular model for education in many U.S. cities in part because they build on community assets and address multiple determinants of educational disadvantage. Since community schools seek to have an impact on populations, not just the students enrolled, they provide an opportunity to improve community health. It has been proposed that community schools influence the health and education of the area residents through three pathways: building trust, establishing norms, and linking people to networks and services. However, no research has been published exploring …

An Evaluation Of The Effect Of Abortion Laws On The Timing Of Abortion, Elizabeth Fuentes

Dissertations and Theses

A record number of restrictive abortion laws, particularly those known as Targeted Regulation of Abortion Providers (TRAP), have been passed in US states in the past half-decade. TRAP laws differ from abortion laws that target patients, such as parental involvement and waiting period policies, because they are often expensive, difficult, or impossible for providers to comply with, resulting in the reduction or elimination of abortion services. This can result in farther travel to and higher costs of abortion services for patients; however, there are no studies assessing whether one consequence of reduced geographic accessibility of abortion services is delays in …

Use Of Water Indices Derived From Landsat Oli Imagery And Gis To Estimate The Hydrologic Connectivity Of Wetlands In The Tualatin River National Wildlife Refuge, Debra Sue Blackmore

Dissertations and Theses

This study compared two remote sensing water indices: the Normalized Difference Water Index (NDWI) and the Modified NDWI (MNDWI). Both indices were calculated using publically-available data from the Landsat 8 Operational Land Imager (OLI). The research goal was to determine whether the indices are effective in locating open water and measuring surface soil moisture. To demonstrate the application of water indices, analysis was conducted for freshwater wetlands in the Tualatin River Basin in northwestern Oregon to estimate hydrologic connectivity and hydrological permanence between these wetlands and nearby water bodies. Remote sensing techniques have been used to study wetlands in recent …

Watershed Response To Climate Change And Fire-Burns In The Upper Umatilla River Basin Using The Precipitation Runoff Modeling System, Kimberly Crystal Yazzie

Dissertations and Theses

This study provides an analysis of watershed response to climate change and forest fire impacts, to better understand the hydrologic budget and inform water management decisions for present and future needs. The study site is 2,365 km², located in the upper Umatilla River Basin (URB) in northeastern Oregon. The Precipitation Runoff Modeling System, a distributed-parameter, physical-process watershed model, was used in this study. Model calibration yielded a Nash Sutcliffe Model Efficiency of 0.73 for both calibration (1995-2010) and validation (2010-2014) of daily streamflow. Ten Global Climate Models using Coupled Model Intercomparison Project Phase 5 experiments with Representative Concentration …

More Than Meets The Eye: Latino Students In A Two-Way Immersion Program And Stereotype Threat, Edgar Ubaldino Solares Vega

Dissertations and Theses

Figures from the 2010 Census indicate that there are 50.5 million Latinos (16% of the total population) living in the United States (US) today. From 2000 to 2010, the Latino population experienced a very rapid growth rate of 43%, which accounted for over half the total population growth. More and more Latino students are entering our public schools and face the reality that 62 years after the Brown V. Board of Education ruling to integrate schools and equalize educational opportunities, schools are more racially and economically segregated and more unequal than they were more than half a century ago. As …

Use Of Distance Weighted Metrics To Investigate Landscape-Stream Temperature Relationships Across Different Temporal Scales, Eric Craig Watson

Dissertations and Theses

Stream ecosystems have experienced significant negative impacts from land use, resource exploitation, and urban development. Statistical models allow researchers to explore the relationships between these landscape variables and stream conditions. Weighting the relevant landscape variables based on hydrologically defined distances offers a potential method of increasing the predictive capacity of statistical models. Using observations from three grouped watersheds in the Portland Metro Area (n=66), I have explored the use of three different weighting schemes against the standard method of taking an areal average. These four different model groups were applied to four stream temperature metrics: mean seven-day moving average maximum …