Environmental Studies Commons^™

A Ground-Based Assessment Framework For Validating Diesel Particulate Emission Models And Applicability In Portland, Or, Kirsten Marie Sarle

Dissertations and Theses

Exposure to diesel emissions causes a range of health effects throughout the body, impairing; respiratory, cardiovascular, central nervous, renal, and cognitive systems. Diesel particulate matter (DPM) in Portland, Oregon is prevalent due to the layout of highly trafficked roadways, rail lines, and marine ports exposing a dense population to high levels of exhaust pollution. These high concentrations of ambient diesel emissions disproportionately impact minority and low-income populations.

Ground-based monitoring and modeling are two ways to assess ambient DPM. However, there are uncertainties in modeled DPM due to knowledge gaps in emissions inventories as well as lack of model validation against …

Current Stormwater Practices And Future Implementation At Portland State University With The Uncertainty Of Climate Change, Evan Suemori, Alexandra Vargas Quiñones

Environmental Science and Management Professional Master's Project Reports

Stormwater runoff is one of the most critical environmental issues in urban areas and is only expected to worsen as climate change persists (EPA, 2016). When precipitation events occur, stormwater travels across impervious surfaces collecting soils and pollutants which can negatively impact water quality in receiving waters. Additionally, stormwater has human health impacts, specifically through flooding and the contamination of drinking water. According to the Intergovernmental Panel on Climate Change (IPCC), it has been determined that climate change will increase the frequency, intensity, and/or number of precipitation events in some regions, including the Pacific Northwest, and decrease in others (IPCC, …

Understory Species Increase Project: Investigating The Revegetation Of Native Herbaceous Species From Seed In Urban Forest Fragments, Erin Mcelroy

Environmental Science and Management Professional Master's Project Reports

Management of urban forest fragments often aims to reduce invasive species and promote native species abundance and diversity. Often, these environments lack natural establishment of native forest species, including herbaceous species that are especially sensitive to site conditions. While herbaceous understory species may represent a small proportion of forest biomass, they perform important functions within forest environments, including nutrient cycling, erosion and runoff control, and providing habitat for wildlife, as well as hosting the greatest biodiversity among other forest strata. However, many restoration projects focus primarily on the revegetation of dominant woody forest species, such as hardwood trees and shrubs. …

Influence Of Climate Change On Forest Fire Occurrence And Distribution Of Sri Lanka And Modeling Of Forest Fire, Mohan Heenatigala

Environmental Science and Management Professional Master's Project Reports

Forest fire is one of the main causes for forest degradation and deforestation which affect ecosystem services provided by the given landscapes. Weather variables like temperature, wind speed and direction, rainfall, and relative humidity also govern the forest fire regime and vulnerability. On the other hand, forest fuel characteristics, human impacts, population density, forest canopy density, slope, elevation, road density, closeness to the human settlement areas are other factors that determine the forest fire impact and potential of damage. Annually, 100 to 2500 hectares of forest resources are damaged due to forest fires in Sri Lanka. From the past few …

Agency, Sense Of Place, And Knowledge On The Zumwalt Prairie: A Social Study Of Place-Based Conservation And Resilience, Dana Elyse Hellman

Dissertations and Theses

Shifting and often diminishing environmental conditions, due to climate change, resource loss, and ecosystem degradation, pose a significant concern to both social and ecological systems. The field of conservation science has attempted to address environmental threats through varying approaches, transitioning from fortress conservation and complete human exclusion to community-based and co-managed models which incorporate human actors and social dimensions in the conservation process. The latest iteration of conservation scholarship, place-based conservation, is deeply rooted in interdisciplinary, social scientific thinking, and calls for significant practitioner engagement with local knowledge, practices, social constructions, and place meanings. It is an approach which emphasizes …

Urban Lakes: Ecosystem Services And Management, Laura Costadone

Dissertations and Theses

Lakes provide a variety of ecosystem services and benefits that greatly contribute to urban sustainability. Despite the growing interest in integrating freshwater systems into management and policy decisions, urban lakes are often overlooked in land-use planning. Nutrient and pollutant runoff from the surrounding urbanized watershed result in water quality deterioration that negatively impact the lake ecological functions and related ecosystem services. The vulnerability and degradation of these urban ecosystems should be a matter of concern, especially considering that, in rapidly growing metropolitan areas, the demand for aesthetic and recreational services provided by urban lakes is increasing. The overall goal of …

Socio-Ecological Perceptions Of Wildfire Management And Effects In Greece, Palaiologos Palaiologou, Kostas Kalabokidis, Andreas Troumbis, Michelle A. Day, Max Nielsen-Pincus, Alan A. Ager

Environmental Science and Management Faculty Publications and Presentations

Adapting to the growing frequency of catastrophic wildfires in Greece and mitigating their effects is a complex socio-ecological problem. We used an online survey to query more than 100 engaged stakeholders who can potentially influence possible legislation and fire management organizational reform, emphasizing civil protection agencies and research entities. We focused the questionnaire on the importance of different wildfire effects to understand which were considered negative or unacceptable, indifferent, or positive. For fire prevention, we examined the range of acceptance and views on fuel management and fire use activities that are limited in extent or not allowed in Greece. We …

Tribal Revegetation Project Final Project Report: 92-Acre Area, Area 5 Radioactive Waste Management Complex, Nevada National Security Site, Nevada, Jeremy Spoon, Brittany Kruger, Richard Arnold, Kate Monti Barcalow, Tribal Revegetation Committee, Trc

Anthropology Faculty Publications and Presentations

Nuwu (Southern Paiute), Newe (Western Shoshone), and Nuumu (Owens Valley Paiute) are linguistically related, Numic-speaking peoples who are part of the broader Uto-Aztecan language group. Numic peoples view the land as a holistic, living, sentient being with feelings and purpose. The land is personified with human characteristics and it needs to be experienced to be understood through “learning by doing.” Numic peoples do not support ground disturbing activities within their ancestral lands, including activities tied to the storage of low-level radioactive waste or classified materials on the NNSS, which they view as culturally inappropriate. These deep-rooted ancestral connections are the …

Biological Invasions In Coastal Marine Ecosystems: How Changes In Trade Are Linked To Ballast Water Delivery Of Nonindigenous Species, Danielle Elizabeth Verna

Dissertations and Theses

Globalization has escalated transfers of nonindigenous species (NIS) across natural dispersal barriers. The resulting biological invasions have become a leading global mechanism of ecological change. NIS are often transported between coastal marine ecosystems in the ballast water of commercial ships, and patterns of NIS introduction and establishment can be linked to global trade dynamics. Here I examined drivers of trade and ballast water across spatial and temporal extents of invasion. The analyses incorporated a variety of datasets on trade, industries, and ship behavior to identify fluctuations in globally transported commodities that lead to changes in maritime shipping patterns and frequency. …

A New Agent-Based Model Provides Insight Into Assumptions In Modeling Forest Management Under Deep Uncertainty, Garry Sotnik, Robert M. Scheller, Brooke Alyce Cassell, Matthew Joshua Duveneck

Environmental Science and Management Faculty Publications and Presentations

Context: Exploratory modeling in forestry uses a variety of approaches to study forest management questions. One key assumption that every approach makes is about the degree of deep uncertainty—the lack of knowledge required for making an informed decision—that future forest managers will face. This assumption can strongly influence simulation results and the conclusions drawn from them, but is rarely studied.

Objectives: Our objective was to measure the degree of deep uncertainty within a forest management simulation to compare alternative modeling approaches and improve understanding of when a specific approach should be applied. Methods We first developed a method for measuring …

Stories From The Outside: Oregon Wildfires 2020, Maude Hines, Marta Petteni, Stefanie Knowlton, Homelessness Research & Action Collaborative, Portland State University, Street Roots

Homelessness Research & Action Collaborative Publications and Presentations

These are the preliminary results of an ongoing project.

Stories from the Outside centers the voices of people experiencing homelessness during the 2020 Oregon wildfire season. PSU’s Homelessness Research & Action Collaborative, in partnership with the Street Roots Ambassadors program, surveyed 73 people in the Portland area in June 2021. Ambassadors sought out Black, Indigenous, and Other People of Color to ensure their voices were represented as BIPOC residents are disproportionately impacted by homelessness.

Many respondents felt disconnected and left out of emergency relief efforts. These are their stories.

Overview:

The most destructive wildfires in Oregon’s history spread across the …

Plastic Roads: Not All They’Re Paved Up To Be, Katie Conlon

Urban Studies and Planning Faculty Publications and Presentations

The growing, global plastic waste crisis is sparking a myriad of solutions from disparate fields. One such end-of-use solution is the application of plastic waste for paving roads. This solution is marketed as a win-win option for plastic waste, use the single-use waste material to pave roads and save money, and simultaneously tackle the accumulated plastic waste. Paving with plastic is occurring globally, but has been especially appealing in the global south contexts where waste management infrastructure is lacking, and pressure to do something about the plastic waste is high. However, there are several environmental and social considerations to paving …

Climate Change And Water Governance: Decision Making For Individual Vineyard Owners In Global Wine Regions, Erin Upton, Max Nielsen-Pincus

Environmental Science and Management Faculty Publications and Presentations

This study investigates the institutional, social, and ecological dynamics that influence regional water governance and individual vineyard owners’ decision making in global wine regions. Global wine grape production has grown steadily over the past 20 years, and climate change has emerged as a driver of transformation in wine regions resulting in a range of impacts. Changes to the climate are anticipated to accelerate in the future and present a number of challenges for wine regions; including risks to human systems, e.g., agriculture, labor, and economics, as well as ecological systems, e.g., surface and groundwater. Water is a critical resource for …

Traditional Ecological Knowledge And Inclusive Pedagogy Increase Retention And Success Outcomes Of Stem Students, Alexander V. Alexiades, Melissa Haeffner, Darryl Reano, Maxine Janis, Jessica Black, Kazuhiro Sonoda, Multiple Additional Authors

Environmental Science and Management Faculty Publications and Presentations

The i-NATURE (Indigenous iNtegration of Aquatic sciences and Traditional Ecological Knowledge for Undergraduate culturally Responsive Education) is a culturally relevant, project-, and place-based curriculum that included extensive applied research experience contextualized for specific Indigenous communities. The program developed a model for incorporating Traditional Ecological Knowledge into STEM undergraduate education which included direct participation of several Indigenous communities in the Pacific Northwest region of the United States. After implementation of the i-NATURE model, we tested whether the inclusive pedagogical strategies used in our intervention improved retention and learning outcomes for the students who participated in the i-NATURE program. We report a …

The Right To Urban Streams: Quantitative Comparisons Of Stakeholder Perceptions In Defining Adaptive Stream Restoration, Chang-Yu Hong, Eun-Sung Chung, Heejun Chang

Geography Faculty Publications and Presentations

Assuring healthy streams in the urban environment is a major goal for restoration scientists, urban planners, and city practitioners around the globe. In South Korea, many urban stream restoration efforts are designed to provide safe water to society and enhance ecological functions. We examined the extent to which the individual interests and different values of multiple stakeholders were considered in previous decision-making in two urban stream restoration projects. The relevant data on stream restoration were collected through the nominal group technique (NGT) and the analytic hierarchy process (AHP) for the two stream cases of a populated inland area and a …

Trail Impact Monitoring In Forest Park, James Mitchell

Environmental Science and Management Professional Master's Project Reports

Forest Park is an appropriately named 5,200 acre natural area located in northwest Portland, Oregon. A recent study estimated park usage near half a million annual visits and found "trails" to be the park’s most highly valued feature. Unfortunately, many trails were not designed for such traffic as evidenced by slipping hazards, erosion and other ecological impacts. In response to these observations, I partnered with Portland Parks & Recreation to conduct an objective trail impact assessment prescribed by the Forest Park Natural Resource Management Plan. I modified methods from past studies to expand on a recently completed trail condition class …

Book Review: Blue Infrastructures: Natural History, Political Ecology And Urban Development In Kolkata, Dana E. Hellman, Melissa Haeffner

Environmental Science and Management Faculty Publications and Presentations

What role does a river play in shaping urban justice and resilience? Jenia Mukherjee tackles this provocative question with an equally provocative answer: rivers are critical infrastructures with biophysical and social histories, both of which inform their physical condition and socio-ecological assets. In Blue Infrastructures, Mukherjee masterfully illuminates the intersection of materiality and history in the urban environment, exploring its implications for a just and resilient future city. Tracing the uses and evolution of Kolkata's “blue infrastructures”—rivers, wetlands, seas, etc.—from the colonial period to the present, Mukherjee's analysis addresses a pressing question in this era of the Urbanocene: How …

Interests And Priorities In Sockeye Salmon Management: How Are Policies Enacted And Interpreted On Three Alaskan Rivers?, Jake P. Palazzi

University Honors Theses

The large export abundance of Alaskan salmon is well documented, and many studies have been performed to assess the economic and environmental viability of the industry and its management. Less research has been done to characterize how state intentions regarding fisheries allocation are conceived of by management or perceived by vulnerable groups in the user pool. This study seeks to qualitatively characterize the disconnect between state and Native Alaskan perceptions of management effectiveness, public interest, and Native Alaskan involvement using interviews. Results showed that Native Alaskan and state manager respondents had very different perceptions of management effectiveness and equity. When …

Waste Management In The Global South: An Inquiry On The Patterns Of Plastic And Waste Material Flows In Colombo, Sri Lanka, Katie Ann Conlon

Dissertations and Theses

Global plastic production continues to increase at an exponential pace, and global waste projections show waste generation rising by 70% by 2050. Plastic waste connects to all social processes, especially within the context of urbanization and development; urban planning and land management; GHG emissions; labor; social equity; public health; rural-to-urban migration; increasing population; increasing consumption; climate change; etc. The focus of this dissertation is an analysis of waste management practices in Sri Lanka using a grounded theory based methodology, with a goal to better understand the social and ecological impacts of plastic waste in Sri Lanka. This research fills a …

Spatial Statistical Approaches To Water Quality Modelling, Janardan Mainali

Dissertations and Theses

This dissertation aims to advance the existing knowledge related to spatial modeling of water quality by exploring and introducing innovative approaches to different spatial conceptualizations for water quality modeling and incorporating upstream-downstream relations in geographically weighted regression. By carrying out a systematic literature review of four different classes of spatial models in Chapter One, this dissertation identifies the following major research gaps: lack of incorporation of multiscale processes, not enough emphasis on spatial weights matrices, and unavailability of upstream-downstream relationships in geographically weighted regressions. Chapters Two and Three were designed to address these gaps in the literature. In Chapter Two, …

Collaboration And Evaluation In Urban Sustainability And Resilience Transformations: The Keys To A Just Transition?, Liliana Elizabeth Caughman

Dissertations and Theses

Climate has changed and will continue changing; city populations are swelling as urbanization continues to accelerate; extreme environmental events like heat waves and floods are becoming more severe and more common; and the climate justice movement is rapidly gaining momentum. It in this context that municipal governments find themselves urgently seeking solutions to transition cities from extractive, vulnerable, and unjust to sustainable, resilient, and equitable. The task is complex and will require systemic transformations across interconnected social, environmental, and economic infrastructures. Emerging theories regarding how to govern such massive changes suggest Transition Management strategies and the values of a just …

Adaptive Injustice: Responsibility To Act In The Plastics Economy, Katie Conlon

Urban Studies and Planning Faculty Publications and Presentations

How can plastic material be reduced, reused, repurposed, or salvaged so it is kept out of rivers, oceans and ecosystems in general? Social awareness about the impacts of plastic pollution is growing, and creative, social solutions to the ‘plastic menace’ are popping up globally. Every day, one can read about the latest, innovative method for managing plastic waste at the local level: plastic PET bottles stuffed with plastic-film food wrappers to make ‘ecobricks;’ paving roads with plastic waste; making yoga-wear out of marine plastic pollution; weaving plastic into tote bags; using a 3D printer to make plastic into products for …

Centering Equity In Oregon’S 100 Year Water Vision: A Student-Led Policy Paper Prepared By The Oregon Water Stories Team At Portland State University, Clare T. Mcclellan, Sadie Boyers, Victoria Cali De Leon, Tony Cole, Laura Cowley-Martinson, Shersten Finley, Dustin Lanker, Julia Seydel, Aakash Nath Upraity, Janet Cowal, Melissa Haeffner

Environmental Science and Management Faculty Publications and Presentations

The purpose of this report is to provide evidence for the need to further intentionally incorporate equity into Oregon’s 100 Year Water Vision. Four case studies contextualize this need and highlight the variety of water issues throughout the state, supported by linguistic analyses of local newspapers. As Oregon policy-makers are responsible for ensuring working water systems for all Oregonians, we also suggest implementable criteria for the evaluation of equity in water issues and decision-making. This student-led and interdisciplinary report comes from the Haeffner-Cowal Oregon Water Stories research lab at Portland State University.

The Effects Of Historical Housing Policies On Resident Exposure To Intra-Urban Heat: A Study Of 108 Us Urban Areas, Jeremy Hoffman, Vivek Shandas, Nicholas Pendleton

Urban Studies and Planning Faculty Publications and Presentations

The increasing intensity, duration, and frequency of heat waves due to human-caused climate change puts historically underserved populations in a heightened state of precarity, as studies observe that vulnerable communities—especially those within urban areas in the United States—are disproportionately exposed to extreme heat. Lacking, however, are insights into fundamental questions about the role of historical housing policies in cauterizing current exposure to climate inequities like intra-urban heat. Here, we explore the relationship between “redlining”, or the historical practice of refusing home loans or insurance to whole neighborhoods based on a racially motivated perception of safety for investment, with present-day summertime …

The Impact Of Paying For Forest Conservation On Perceived Tenure Security In Ecuador, Kelly W. Jones, Nicolle Etchart, Margaret Holland, Lisa Naughton-Treves, Rodrigo A. Arriagada

Forest Collaborative Research

We study the impact of Ecuador’s national forest conservation incentives program on reported land conflicts. Data come from a survey of > 900 households located within 49 indigenous and Afro-Ecuadorian communities holding communal conservation contracts.We use quasi-experimental methods to test for relationships between program participation and changes in land conflicts. Respondents reported that the program reduced land conflicts when households resided in communities with de facto communal tenure arrangements (vs. de facto semiprivate arrangements).We find no evidence that the conservation incentive program increased land conflicts. These results counter concerns that conservation payments undermine land tenure security; in some cases perceived tenure …

Real-Time Evaluation Of City–University Partnerships For Sustainability And Resilience, Liliana Elizabeth Caughman, Lauren Withycombe Keeler, Fletcher Beaudoin

Institute for Sustainable Solutions Publications and Presentations

Cities face many challenges in their efforts to create more sustainable and resilient urban environments for their residents. Among these challenges is the structure of city administrations themselves. Partnerships between cities and universities are one way that cities can address some of the internal structural barriers to transformation. However, city–university partnerships do not necessarily generate transformative outcomes, and relationships between cities and universities are complicated by history, politics, and the structures the partnerships are attempting to overcome. In this paper, focus groups and trial evaluations from five city–university partnerships in three countries are used to develop a formative evaluation tool …

Forests And Mental Health In South Africa: Panel Data Evidence, Dambala Gelo

Forest Collaborative Research

Slides from a presentation that examines the linkages between the green environment (urban forests, green open urban space) and mental health in South Africa. The author used representative panel data from the National Income Dynamics Survey, including the Center for Epidemiological Studies Short Depression Scale, to uncover these links.

Concept Note: Mexico, Danae Hernandez, Alejandro López-Feldman, Fernanda Márquez-Padilla

Forest Collaborative Research

Slides from a presentation that explores the connections between forest cover and deforestation on human health. The authors analyze medical records from the Mexican National Social Security Institute (IMSS) to determine the extent to which health outcomes are related to proximity to forests or deforested areas.

Economics Of Afforestation: A Global Leadership Opportunity For Efd, Jeffrey R. Vincent

Forest Collaborative Research

Slides from a presentation that examines the economics of afforestation and forest restoration in light of climatic changes, rising CO₂ levels, carbon sequestration and other factors. Provides directions for further research, including retrospective analysis of previous afforestation projects, and targeted analysis of impediments to institutional investment in afforestation.

Urban-Rural Surface Temperature Deviation And Intra-Urban Variations Contained By An Urban Growth Boundary, Kevan B. Moffett, Yasuyo Makido, Vivek Shandas

Urban Studies and Planning Faculty Publications and Presentations

The urban heat island (UHI) concept describes heat trapping that elevates urban temperatures relative to rural temperatures, at least in temperate/humid regions. In drylands, urban irrigation can instead produce an urban cool island (UCI) effect. However, the UHI/UCI characterization suffers from uncertainty in choosing representative urban/rural endmembers, an artificial dichotomy between UHIs and UCIs, and lack of consistent terminology for other patterns of thermal variation at nested scales. We use the case of a historically well-enforced urban growth boundary (UGB) around Portland (Oregon, USA): to explore the representativeness of the surface temperature UHI (SUHI) as derived from Moderate Resolution Imaging …