Geography Commons^™

Trends And Spatial Variability In Dry Spells Across The South-Central United States, Jill C. Trepanier, Michael J. Roberts, Barry D. Keim

Faculty Publications

Annual average and maximum spells with no precipitation in the southern United States are analyzed. In this study, dry spells are defined as consecutive days with no measurable rainfall. The study area includes 70 weather stations in Texas, Oklahoma, Louisiana, Arkansas, Mississippi, and Tennessee. Interarrival times between daily precipitation records for each station provide the data for this analysis. All 70 stations were analyzed from 1950 to 2013. Six stations that each have data for more than 100 years were analyzed for the period from 1908 to 2013. Approximately 25% of stations in the region show significant negative trends through …

Throughfall Nutrients In A Degraded Indigenous Fagus Orientalis Forest And A Picea Abies Plantation In The Of North Of Iran, Parisa Abbasian, Pedram Attarod, Seyed Mohammad Moein Sadeghi, John T. Van Stan, Seyed M. Hojjati

Earth, Environment & Sustainability: Faculty Publications

Aim of study: The objective of this study was to compare the quantity and quality of TF (throughfall) in an indigenous, but degraded, stand of Fagus orientalis and Picea abies plantation.

Area of study: Forests of Kelar-Dasht region located in Mazandaran province, northern Iran.

Material and Methods: TF measured by twenty collectors that were distributed randomly underneath each stand. For 21 storms sampled in 2012 (August-December) and 2013 (April-June), we analyzed pH, EC, Ca2+, Mg2+, K+, NO3-, and P of gross rainfall (GR) and TF.

Main results: Cumulative interception (I) for F. orientalis and P. abies were 114.2 mm and …

Remaking Nature In Montana: Topophilic Considerations Of Wolves And Wolf Trapping, Andrew Myers

Graduate Student Theses, Dissertations, & Professional Papers

In 2011, after nearly forty years of federal protection, the gray wolf was removed from the Endangered Species List in Montana and its management entrusted to the Montana Fish, Wildlife & Parks. The implementation of public trapping seasons in 2012 as a method to control wolf populations has further inflamed an already embroiled debate. The purpose of this research was to investigate how the presence of wolves and wolf trapping impacts human attachments to landscapes of “nature” in Montana by focusing on the following questions: What are the public’s social constructions of wolves? What are the public’s social constructions of …

On The Detection And Monitoring Of The Transport Of An Asian Dust Storm Using Multi-Sensor Satellite Remote Sensing, Hesham El-Askary, S. K. Park, M. H. Ahn, A. Prasad, Menas Kafatos

Mathematics, Physics, and Computer Science Faculty Articles and Research

Dynamical and physical features of a long range transported dust event originating in China affecting Korea early March 2008 are examined using an integrative multi-sensor and multi-algorithm approach. Aerosol loadings and their size mode were analyzed over both ocean and land surfaces using the Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol optical depth (AOD), employing standard dark target (DT) and deep blue (DB) algorithms, and the Ångström exponent (AE). Anthropogenic absorbing aerosols and smoke were found to be significant over the Indochina Peninsula, the Philippines and southern China, while a mixture of dust and pollution were predominant over central to northern …

Geography Standard Posters: The Use Of Geography, Center For Spatial Analysis And Research. Portland State University

Instructional Materials

The poster looks at applying geography to interpret the past and applying geography to interpret the present and plan for the future.

Geography Standard Posters: Human Systems, Center For Spatial Analysis And Research. Portland State University

Instructional Materials

The poster looks at characteristics of human populations, the complexity of earth's cultural mosaics, patterns of economic independence, patterns of human settlement, how do urban and rural areas differ, and the division and control of Earth's surface.

Let's Learn: All About Maps - Teacher Guide, Center For Spatial Analysis And Research. Portland State University, Teresa L. Bulman, Morgan Josef, Gwyneth Genevieve Mckee Manser

Instructional Materials

Teacher activity book. Inside you will find fun activities to help you learn about maps and how they are used in everyday life.

The student guide can be found here: https://archives.pdx.edu/ds/psu/27717

Changing States: Using State-And-Transition Models To Evaluate Channel Evolution Following Dam Removal Along The Clark Fork River, Montana, Christopher Van Dyke

Theses and Dissertations--Geography

Located just east of Missoula, Montana, Milltown Dam stood from 1908 to 2008 immediately downstream of the Clark Fork River’s confluence with the Blackfoot River. After the discovery of arsenic-contaminated groundwater in the nearby community of Milltown, as well as extensive deposits of contaminated sediment in the dam’s upstream reservoir, in 1981, the area was designated a Superfund site – along with much of the Upper Clark Fork Watershed. This motivated the eventual decision to remove the dam, perform environmental remediation, and reconstruct approximately five kilometers of the Clark Fork River and its floodplain. This study is part conceptual and …

State Violence, Mobility And Everyday Life In Cairo, Egypt, Christine E. Smith

Theses and Dissertations--Geography

State violence in Egypt is an embedded part of daily life and popular culture, and well documented in social and news media. The uprisings of January 11, which took place in Egypt were organized in large part against violence and torture regularly delivered by police forces. In this dissertation I examine the implications of chronic state violence on everyday life for low-income Egyptians. In doing so, this dissertation provides analysis of how violence shapes forms of intimacy within social life, how it shapes urban landscapes and the politics therein and how it informs individual piety and banal practices of security. …

Firm Characteristics And Organizational Change: The Effects Of Electronic Commerce In The United States Manufacturing Industry, Candice Y. Wallace

Theses and Dissertations--Geography

This dissertation seeks to provide insight to how e-commerce adoption and utilization change the condition of U.S. Manufacturing establishments, by answering two interrelated questions: (1) What are the characteristics of manufacturing establishments that were early adopters of e-commerce activities?; (2) Once e-commerce is adopted, how has adoption affected employment within manufacturing establishments? The U.S. manufacturing industry was selected for analysis as manufacturing has been and continues to be an important sector for employment and the overall U.S. economy and has been the primary sector responsible for the majority of Business-to-Business e-commerce activity.

Using two econometric models, seemingly unrelated regression (SUR) …

Regulating Urban Belonging: China's Hukou System As Intra-National Bordering Process, Leif Johnson

Theses and Dissertations--Geography

In China's urban metropoles, the hukou system of household registration regulates one of the largest movements of people in human history. While rural-urban migrations are reshaping societies worldwide, the migrants who make up a great portion of urban China's low-wage labor force and burgeoning population face unique legal and social challenges. Although the trajectories of their migration do not cross international boundaries, most are legally prevented from ever gaining the within China's hukou system of household registration. The functions of this system parallel those of national citizenship policies, and are difficult to explain through standard conceptions of sovereignty and national …

Should We Stay Or Should We Go?: A Study Of Indian It Migrants In Raleigh-Durham, North Carolina: Deciding To Stay In The United States Or Return To India, Andrew Robert Patrick Ashley

Theses and Dissertations--Geography

Over the past two decades, an increasing number of IT professionals from India have been migrating to the United States on temporary H-1B or F-1 visas. This thesis offers a case study to address how migrants on such temporary visas decide whether to seek further residency in the United States or return to India. Based on interviews conducted in 2013 and 2014 in the Raleigh-Durham area of North Carolina, I examine the factors migrants consider, as well as how the struggles presented through the visa programs may effect these considerations. I also analyze how mass migration from India has changed …

Rediscovery Of A Native American Cultural Landscape: The Chickasaw Homeland At Removal, Michael D. Walls

Theses and Dissertations--Geography

Little information beyond generalities exists regarding the cultural landscape of the Chickasaw Indians in their ancestral homelands prior to Removal in the late 1830s. This dissertation evaluates one possible archival source for specifics of Chickasaw land use, the field notes and survey plats compiled as part of the Public Land Survey System (PLSS). The process of original survey following land cession treaty divided the ceded area up into the familiar square-mile rectangular system of townships and ranges that extends from the Mississippi Territory westwards, in the so-called public land states.

The research compiles all cultural observations made by the surveyors …

Hispanic Religious Outreach In The Upper U.S. South: Missionary Outreach, Strategies, And Institutional Praxis Among Mainstream Denominations, John Benitez

Theses and Dissertations--Geography

Hispanic religious ministry provides a way for long established mainstreams to stay afloat in the face of the demographic realities in the U.S. today. Unfortunately, the lack of literature, particularly in geography, precludes the examination of elements of contemporary Hispanic religious outreach, including such considerations as strategies, their effectiveness, and institutional praxis among mainstream religious denominations in the U.S.

Using a hybrid methodology that relies on several techniques, I examine Hispanic religious ministry in the Upper U.S. South, which geographers tell us is America’s newest Hispanic destination. I, thereby, develop and present here a case study to compare Hispanic religious …

Living Care-Fully: Labor, Love And Suffering And The Geographies Of Intergenerational Care In Northern Ghana, Kelsey B. Hanrahan

Theses and Dissertations--Geography

Care is socially constructed, shaped by expectations embedded within particular relationships and the culturally-specific understandings of what it means to work, love and suffer. In this dissertation, I conceptualize care as a fundamental component of everyday life in which individuals are oriented towards the needs of others. Drawing on ethnographic fieldwork in a rural Konkomba community in northern Ghana, I explore the geographies of care shaping the everyday experiences of women engaged in intergenerational relationships as they encounter emerging dependencies associated with ageing. Dependencies emerge when an individual requires support and care from another, and in turn the struggles for, …

Social Space And Social Media: Analyzing Urban Space With Big Data, Ate Poorthuis

Theses and Dissertations--Geography

This dissertation focuses on the key role that big data can play in minimizing the perceived disconnect between social theory and quantitative methods in the discipline of geography. It takes as its starting point the geographic concept of space, which is conceptualized very differently in social theory versus quantitative methodology. Contrary to this disparity, an examination of the disciplinary history reveals a number of historic precedents and potential pathways for a rapprochement, especially when combined with some of the new possibilities of big data. This dissertation also proposes solutions to two common barriers to the adoption of big data in …

The Use Of Improved Technology And Market-Based Incentives To Increase Forest Resource And Biodiversity Conservation In Rwanda, Kelly M. Rayens

Theses and Dissertations--Forestry and Natural Resources

This study evaluated the effectiveness of two distinct approaches to ecosystem conservation in Rwanda’s Nyungwe National Park: cookstove technology adoption and market-based policy instruments. A June 2014 survey of 250 households revealed that use of improved cookstove technology dramatically decreased fuelwood consumption for households in rural Rwanda, but that design, engineering and conflicting policy issues can hamper the widespread use of energy-efficient cooking technology. The second component of this research used the analytic hierarchy process (AHP) within a multi-criteria analysis (MCA) framework to explore the options for designing and implementing market-based instruments around the country’s conservation targets, particularly the highly …

Living On The Edge: Rethinking Pueblo Period: (Ad 700 – Ad 1225) Indigenous Settlement Patterns Within Grand Canyon National Park, Northern Arizona, Philip B. Mink Ii

Theses and Dissertations--Anthropology

This dissertation challenges traditional interpretations that indigenous groups who settled the Grand Canyon during the Pueblo Period (AD 700 -1225) relied heavily on maize to meet their subsistence needs. Instead they are viewed as dynamic ecosystem engineers who employed fire and natural plant succession to engage in a wild plant subsistence strategy that was supplemented to varying degrees by maize. By examining the relationship between archaeological sites and the natural environment throughout the Canyon, new settlement pattern models were developed. These models attempt to account for the spatial distribution of Virgin people, as represented by Virgin Gray Ware ceramics, Kayenta …

International Migration Of Health Professionals And The Marketization And Privatization Of Health Education In India: From Push-Pull To Global Political Economy, Margaret Walton-Roberts

Geography and Environmental Studies Faculty Publications

Health worker migration theories have tended to focus on labour market conditions as principal push or pull factors. The role of education systems in producing internationally oriented health workers has been less explored. In place of the traditional conceptual approaches to understanding health worker, especially nurse, migration, I advocate global political economy (GPE) as a perspective that can highlight how educational investment and global migration tendencies are increasing interlinked. The Indian case illustrates the globally oriented nature of health care training, and informs a broader understanding of both the process of health worker migration, and how it reflects wider marketization …

Grassroots Planning: An Actor-Network Study Of Surfing Waves In Missoula, Montana, Alexander S. Pichacz Jr.

Graduate Student Theses, Dissertations, & Professional Papers

Brennan’s Wave, in downtown Missoula, has become an iconic feature of the town. Through the diligent work of a group of community advocates a dangerous and unsightly irrigation diversion structure was repurposed to include a recreation feature in the middle of the river that improved safety while simultaneously maintaining the integrity of the structure. The success of Brennan’s Wave has led to its replication through the planning of another memorial wave, the Max Wave, to be built downstream at the site of a similar irrigation structure. This study investigates how these structures are planned for and built by utilizing an …

Raising Grain In Next Year Country: Dryland Farming, Drought, And Adaptation In The Golden Triangle, Montana, Caroline M. Stephens

Graduate Student Theses, Dissertations, & Professional Papers

Climate change has already and will likely continue to impact agriculture in the Western United States, threatening water supplies for both irrigated and rainfed agriculture (Calzadilla et al. 2010; Chambers and Pellant 2008; MacDonald et al. 2010; Pedersen et al. 2009). In the Golden Triangle, a region in north central Montana, known for its dryland grain production, the same is true. There is a need for in-depth, fine-grained, place-based, and qualitative research about the process of climate change adaptation in agriculture (Miller et al. 2013). Drought challenges farmers in the Triangle, which is semiarid and receives 10-15 inches of annual …

A Gis Assessment Of Ecoregion Representation In Chile's Existing And Proposed Integrated Network Of Protected Areas, Jessica Schutz

Graduate Student Theses, Dissertations, & Professional Papers

Chile's state designated protected areas are reported to show representation bias and to be unable to meet conservation goals. Private protected areas are considered an important tool to resolve these issues, which has led to support for increasing the role of private protected areas in Chile and creating an integrated public-private protected area network. But the validity of the capacity of private protected areas to fix Chile's state protected area network bias, and the advantage of creating an integrated protected area network, have not been assessed. This study uses the most recent data on Chile's state, private, and international protected …

Determining Rockfall Volumes In Three Sites Along Habs Mountain Road In Southwestern Saudi Arabia, Using Lidar Technology, Abdullah Ayed Al-Otaibi

Masters Theses

"The rugged elevated topography is a characteristic feature of the western and southwestern regions of Saudi Arabia. Few arterial roads connect the scattered villages of these regions to major cities, such as Habs Road in Jazan region. Rock fall poses a serious hazard to people, property and animals along the rock cuts of this road. Although no traditional Rockfall studies have previously been applied to this road, accessibility and rock formation shape and structure variability influenced the choice of using Terrestrial Light Detection And Ranging (LiDAR) technology to calculate the volume of rockfall at selected sites along this road.

Software …

A New Technique For Modeling The Geomorphology Of A Slow Moving, Soft-Slope Landslide Using Terrestrial Lidar, Nathan Bradley Rohrbaugh

Masters Theses

"Soft slope movement is a big problem whether it involves an engineered slope, one that is near infrastructure, or both. Active landslides that fail slowly sometimes allow ample time to affect remedial works. In order to plan effective remedial works, there needs to be a model of the entire geometry of the slide. This thesis describes a new approach to evaluate the morphology of slope geometry using Light Detection and Ranging (LiDAR) data obtained from simple targets strategically positioned on a slide body. The data was gathered in three-month intervals over a period of one year to allow enough time …

Renewing Spokane: A Study Of Motivating Forces Behind Downtown Revitalization Projects, Kara K. Mowery

All Master's Theses

This study examines the motivating forces behind downtown urban renewal projects through qualitative interview research. Using Spokane, Washington, as a case study, interviews were conducted with key players in downtown revitalization, including public administrators, private developers, and non-profit representatives. While neoliberal theory indicates that economic return serves as the primary motivation for investment, interview questions were designed to uncover whether additional motivating factors stimulate renewal work. Results indicate that those conducting renewal projects are primarily motivated by economics, but additionally cite heritage preservation values and community development as significant factors. Moreover, contemporary renewal projects are found to be small-scale endeavors, …

The Economic Impacts Of Forest Pathogens In Washington State: A Hedonic Approach, Logan Blair

All Master's Theses

An increase in the incidence of forest pathogens in the Western US has created new resource management issues. In this research I employ a dataset of 170,141 housing transactions in twelve Western Washington counties to quantify the impacts of parasitic forest damage on the proxy real estate market. Specifically, I estimate a set of hedonic fixed effects models to control for omitted variable bias and spatial autocorrelation. Results show statistically significant impacts on property values in the presence of species specific and aggregate defoliation, suggesting new information for forestry management and policy.

Behavioral Response Of Pacific Lamprey (Entosphenus Tridentatus) To Predator Odors, Laurie L. Porter

All Master's Theses

Pacific lamprey (Entosphenus tridentatus), a species facing serious threats to their existence, experience a number of challenges in reaching their desired spawning grounds during the adult migratory phase, and predators are suspected to be one of these challenges. Understanding if Pacific lamprey respond to predator odorants may provide a management tool for use in conjunction with attractants in guiding lamprey to suitable spawning habitat and deterring them from poor habitat. Previous research has failed to explore Pacific lamprey response to predator odorants, although much research exists on attractant odorants. In our study, we tested Pacific lamprey response to …

Examining The Spatial Aspects Of Residential Energy Efficiency: Gis And Survey Analysis In Boulder County, Colorado, Walter Stanley Scheib

Electronic Theses and Dissertations

The completion of residential energy efficiency upgrades leads to multifaceted benefits including cost and energy savings, increased household comfort, health benefits, and reduced CO2 emissions. As a result of these benefits, state and local energy efficiency programs across the United States are striving to increase the widespread adoption of energy efficiency upgrades by homeowners. Many program strategies for widespread adoption are informed by case studies of other successful energy efficiency programs. These program strategies would benefit from the additional insight provided by spatial analysis, but a spatial perspective is currently underutilized by energy efficiency programs across the United States. This …

Assessment Of Land Cover And Riparian Zones For The Ford Research Forest - Hickey Creek/Sturgeon River And Falls River Subwatersheds, Fay Dearing

Dissertations, Master's Theses and Master's Reports - Open

For landowners, knowing the contents of their land is always a primary concern. Traditional field based assessments can be challenging and expensive for large landholdings as well. However, by utilizing remote sensing and GIS models the land cover/land use and riparian areas can be more easily identified on a larger landscape level. To this end two remote sensing techniques were explored to create a land cover/land use map for the study area. The first, utilizing object-oriented techniques and high spatial resolution generated an overall accuracy of 71.97% which indicated a moderate agreement with the classified image and the field truthed …

You Are What You Tweet: Connecting The Geographic Variation In America's Obesity Rate To Twitter Content, Ross J. Gore, Saikou Diallo, Jose Padilla

VMASC Publications

We conduct a detailed investigation of the relationship among the obesity rate of urban areas and expressions of happiness, diet and physical activity on social media. We do so by analyzing a massive, geo-tagged data set comprising over 200 million words generated over the course of 2012 and 2013 on the social network service Twitter. Among many results, we show that areas with lower obesity rates: (1) have happier tweets and frequently discuss (2) food, particularly fruits and vegetables, and (3) physical activities of any intensity. Additionally, we provide evidence that each of these results offer different and unique insight …