Doctor of Philosophy / Department of Geography / John Harrington, Jr. / Geographers, as part of their work as scholars and academics, continually “do” geography. Geography is practiced as research when tools, perspectives, and techniques are applied to problems or areas of study, exploring, understanding, and building geographical information. Geography is practiced as a social discipline when geographers interact with those around them, sharing geographical knowledge through writing, publishing, presenting, teaching, and discussion so others can read, listen, and engage. In doing geography – continuously practicing research and engaging in the documentation and communication of geographical knowledge – geographers also actively continuously construct the history of geography. These incidences, slides, and pages of knowledges are the foundation and structure of geography as a practiced discipline. Research explored the historiographies of geographical knowledges in presidential addresses of the Association of American Geographers, thematic conceptualizations of the subfield of cultural geography, and representation of women across editions of introductory human geography textbooks through content analysis and spatial. Conclusions strongly support the contention that geographic knowledges and the nature of geographic thought actively evolve as contemporary scholars practice their profession. By paying attention to these constructive processes and understanding their interactive role in it, geographers are better informed of the history of their specialty and their direct and vested role in the enterprise.

Master of Science / Department of Geography / Douglas Goodin / Hyperspectral data has been widely used for estimates of canopy biochemical content over the past decades. Most of these studies were conducted in forests or crops with relatively uniform canopies. Feasibility of the use of hyperspectral analysis in heterogeneous canopies with diverse plant species and canopy structures remains uncertain. Spectral data at the canopy level, with mixed background noise, canopy biochemical and biophysical properties create more problems in spectral analysis than that at the leaf level. Complications of heterogeneous canopies make biochemical retrieval through remote sensing even more difficult due to more uneven spatial distribution of biochemical constituents. The objective of my research was to map canopy nitrogen content in tallgrass prairie with mixed canopies by means of hyperspectral data from in-situ and airborne measurements. Research efforts were divided into three steps: (1) the green leaf area index (LAI) retrieval, given LAI is an important parameter in scaling nitrogen content from leaves to canopies; (2) canopy nitrogen modeling from analysis of in-situ hyperspectral data; and (3) canopy nitrogen mapping based on aerial hyperspectral imagery. Research results revealed that a fine chlorophyll absorption feature in the green-yellow region at wavelengths of 562 – 600 nm was sensitive to canopy nitrogen status. Specific spectral features from the normalized spectral data by the first derivative or continuum removal in this narrow spectral region could be selected by multivariate regression for nitrogen modeling. The optimal nitrogen models with high predictive accuracy measured as low values of root-mean-square error (RMSE) were applied to the aerial hyperspectral imagery for canopy nitrogen mapping during the growth seasons from May to September. These maps would be of great value in studies on the interactions between canopy vegetation quality and grazing patterns of large herbivores in tallgrass prairie.

Master of Arts / Department of Geography / Kendra K. McLauchlan / Reconstructing fire regimes and fuel characteristics is an important aspect of understanding past forest ecosystem processes. Fuel sources and disturbance regimes throughout the upper Midwestern United States have been shown to be sensitive to regional climatic variability such as drought periods on millennial timescales. Yet, records documenting the complex connections between disturbance activity and the corresponding fuel source fluctuations in mesic deciduous forests and oak savanna forests in this region are limited. Thus, it has been difficult to provide a framework to evaluate drought conditions on fire activity and the relationships with fuel source fluctuations in this region. Here, I conducted high-resolution charcoal analyses of lake sediments from four sites in southeastern-southcentral Wisconsin (USA) to characterize fire activity and fuel source fluctuation in mesic deciduous forests and prairie-oak savanna over the last 10,000 years. I found that fire regimes across the four study sites have been asynchronous throughout the Holocene, due to site-specific differences that have strongly influenced local fire regimes. I also found that during periods of high fire activity the primary fuels were from arboreal sources, and during periods of low fire activity the primary fuels were from non-arboreal sources. However, fluctuations in fuel sources did not always correspond to changes in vegetation, or changes in fire frequency.

Master of Arts / Department of Geography / John Harrington, Jr / Nighttime rainfall has long been thought of as an important component to the central Great Plains hydroclimate during the wettest three-month period known as the “late spring -early summer precipitation maximum.” Research has suggested that nocturnal rainfall in the region results from a phenomenon known as the nocturnal Great Plains Low-Level Jet (GPLLJ). The jet, which originates in the Gulf of Mexico, transports moisture into the Great plains during the nighttime hours and often provides fuel for nighttime convection. The climatological characteristics of nighttime rainfall, as well the configuration of the low-level winds and the mechanisms behind its formation during this three-month wet period, however; are not well understood. Using hourly rainfall data from Topeka, KS, the nighttime rainfall characteristics are examined Topeka, KS and other Kansas stations for a 63-year period from 1950-2012 for May-July. Additionally, using the NCEP/NCAR Reanalysis data, the structure and configuration of the southerly wind phenomenon was analyzed based on its horizontal and vertical characteristics for nighttime rainfall events in May, June and July. A subsequent analysis also analyzed the larger synoptic-scale environment in place for six half-month periods from May to July. The results indicate that nighttime rainfall is a major contributor to the overall moisture budget in the Great Plains, contributing close to 50% of the overall rainfall total for the three-month period. The percentage of nighttime rainfall increases from west-east across the state, as well as temporally from May to July. The southerly winds are at their strongest during May events, tends to reach its peak at 850 mb at 6z (0000LST) near south-central Oklahoma, and forms as the result of both synoptic and thermal mechanisms. The synoptic mechanisms in place that generate the a southerly wind component change by month, leading to incredible variation in terms of its characteristics during nighttime rainfall events.

Master of Arts / Department of Geography / Jeffrey S. Smith / The county seat town holds an important role in American geography. Whether serving simply as a governmental or judicial meeting place for a specific political district, or acting as an economic hub for a county and its surrounding hinterlands, any given American county seat exists with a variety of different cultural meanings imposed upon it. This study analyzes the historical and cultural geographies of two rural counties in the heart of the American Great Plains which have, or at one time had, exceptionally small county seats of fewer than 250 residents. Both counties are adjacent to one another in western Kansas. One, Logan County, originally had its county seat located near its geographic center in the village of Russell Springs, but relocated its seat in the 1960s to the larger town of Oakley. Gove County, today maintains its original county seat of roughly 150 inhabitants near its geographic center despite the presence of more populated towns within the county’s boundaries. Both counties provide excellent material for a case study devoted to understanding what the role of the county seat is in rural America today. In this study I find that the discrepancies between these counties and their seats arise from the different ways in which distinct cultural groups understand or interact with the county seat. An individual’s age, ethnicity, land use or livelihood practices, and location within a county all have an effect on their interpretation of the role of the county seat. This thesis provides a glimpse into the complex cultural nature of rural Great Plains communities through the lens of historical and geographical change.

Master of Arts / Department of Geography / J. M. Shawn Hutchinson / Time series of normalized difference vegetation index (NDVI) data from satellite spectral measurements can be used to characterize and quantify changes in vegetation phenology and explore the role of natural and anthropogenic activities in causing those changes. Several programs and methods exist to process phenometric data from remotely-sensed imagery, including TIMESAT, which extracts seasonality parameters from time-series image data by fitting a smooth function to the series. This smoothing function, however, is dependent upon user-defined input parameter settings which have an unknown amount of influence in shaping the final phenometric estimates. To test this, a sensitivity analysis was conducted using MODIS maximum value composite NDVI time-series data acquired for Fort Riley, Kansas during the period 2001-2012. The phenometric data generated from the different input setting files were compared against that from a base scenario using Pearson and Lin’s Concordance Correlation Analyses. Findings show that small changes to parameter settings results in insignificant differences in phenometric estimates, with the exception of end of season data and growing season length. Next, a time-series analysis of the same MODIS NDVI data for Fort Riley and nearby Konza Prairie Biological Station (KPBS) was conducted to determine if significant differences existed in selected vegetation phenometrics. Phenometrics of interest were estimated using TIMESAT and based on a Savitzky-Golay filter with parameter settings found optimal in the previous study. The phenometrics start of season, end of season, length of season, maximum value, and small seasonal integral were compared using Kolmogorov-Smirnov (K-S) and showed significant differences existed for all phenometrics in the comparison of Fort Riley training areas and KPBS, as well as low- versus high-training intensity areas within Fort Riley. Fort Riley and high-intensity training areas have earlier dates for the start and end of the growing season, shorter growing season lengths, lower maximum NDVI values, and lower small seasonal integrals compared to KPBS and low-intensity training areas, respectively. Evidence was found that establishes a link between military land uses and/or land management practices and observed phenometric differences.

Doctor of Philosophy / Department of Geography / Kevin Blake / The American West is a land of great diversity and stark contrast. It is also a landscape marked by rapid change as a result of such forces as globalization, population growth, and heightened interest in natural resources (either for recreation or extraction). This dissertation investigates these changes to the region through a repeat photography analysis. Between 1982 and 1984, Thomas and Geraldine Vale traveled along U.S. Highway 89 from Glacier National Park, Montana to Nogales, Arizona. Their subsequent work, Western Images, Western Landscapes: Travels Along U.S. 89 (University of Arizona Press, 1989), contained fifty-three photographs from this journey, representing a cross section of the West from border to border. Nearly every facet of the region was represented, from the remote prairie landscapes of Montana to the bustling Phoenix downtown, and from the largest open pit mine in the world to seldom visited corners of Yellowstone National Park. Between March 2009 and August 2010, I retraced the steps taken by the Vales and successfully rephotographed all of the locations contained within their book. The observed continuity or change is examined thematically in order to address the landscapes and cultures of the West in greater detail. Specifically, chapters within this dissertation visually and textually describe changes that have occurred along national borders, within Native American reservations, throughout the rural landscapes and national parks of the region, within the many resource extraction industries, and within towns and cities of every size. Significant findings, which are well depicted in the photographic pairings, include heightened national security along the borders, problems of overuse in many parks and protected areas, the transition of traditional small towns into communities increasingly dependent upon tourism for survival, and both beautification and revitalization efforts taking place in the urban cores of Phoenix and Salt Lake City. By painting a vivid picture of recent Western geography, this research provides for greater ability for residents and scholars of the region to understand the forces at work within their communities and surroundings.

Doctor of Philosophy / Department of Geography / Jeffrey S. Smith / India is a country rich in religious beliefs, with a cultural landscape infused with symbolic meaning. The nation is currently experiencing great advances in development, standard of living, and connectedness to global markets and cultures. For remote communities, the spread of global ideas can significantly impact traditional customs and distinctive landscapes. Vernacular houses, meaning those particular to a region and culture, and built with local ingenuity, are vital contributors to sense of place and cultural identity. India’s remote mountainous regions in particular, are at a threshold of change in the vernacular landscape. Therefore, my dissertation focuses on Kinnaur district, of Himachal Pradesh, a remote folk region of the Indian Himalaya with a strong vernacular heritage and potential for great change in its cultural landscape. Because architecture is culturally significant and provides a clear medium in which to see changes in the landscape, the purpose of this research is (1) to determine the characteristic features of the Kinnauri vernacular house, (2) to identify the reasons for and process of vernacular landscape change, and (3) to illustrate the potential of decorative or small-scale features as significant components of place-making and enduring vernacular landscapes. My methods consisted of historical archives, landscape analysis (direct observation, photography, and drawings), and open-ended in-depth interviews with homeowners, builders, and officials. Through these methods, I distilled the characteristics of the Kinnauri vernacular house to eight distinguishing architectural features and determined the three most influential agents that directly impact landscape change and the vernacular house. My final conclusions recognize a paradox in landscape identity and that small-scale features are significant components in place-making. Furthermore, my research highlights the crucial role of ensembles and adaptability in enduring vernacular landscapes. Although homogenization of landscapes is evident across the globe, many places still exhibit individualized characteristics and cultural identity. I contend that the increased ability of small-scale architectural features to adapt to new settings, allows a modernizing landscape to preserve aspects of the vernacular architecture.

This thesis examines the ways in which women assess and seek resources in their urban contexts. I argue that the struggles of daily life in local communities and institutional groups can produce ideological spaces into which new practices, arising from increased consciousness of issues, can be developed. My aim has been to uncover women's experiences in a way that not only interprets meanings from their practices, but also encourages such practices to be seen as valid renderings of women's understandings. I examine women's initiatives through the analysis of varying contexts. While I acknowledge the historical importance of the domestic situation as a threshold for much historic activism, women's proactivity requires a broader situational analysis. I therefore present cases of proactivity within the domestic, public and business spheres, within the two cities of Waitakere and North Shore of Auckland, New Zealand. Through the search for new progressive social identities, women's activities at the inter-personal level are a prime source of social change. It is through the recursive relationship between women as agents and the social structure, that changing interpretations of social expectations are produced, allowing for creative activism. While women's initiatives may aim to transform particular social environments, they become part of the incremental process of change that alters the experience and structure of women's lives. The thesis has four parts. The first outlines the scope, objectives and theoretical framework, while the second conceptualises women's agency and its positioning within social gendered structures. Part Three presents the investigative processes linking the theoretical framework and the empirical analysis. Part Four submits the thematic interpretations of the thesis, concluding that women can be agents of social change in a diversity of ways. I acknowledge my feminist stance, one with layerings of objectives and motivations. I view women's circumstances as resulting from the interweaving of structural forces and personal capacities. The resulting awareness of women's experiences can challenge the values and concepts of masculine discourses. This is viewed through the concept of multiplicity. On a political level this means creating a resistance to hierarchies and a commitment to a plurality of voice, style and structure. / Subscription resource available via Digital Dissertations only.

This thesis examines the ways in which women assess and seek resources in their urban contexts. I argue that the struggles of daily life in local communities and institutional groups can produce ideological spaces into which new practices, arising from increased consciousness of issues, can be developed. My aim has been to uncover women's experiences in a way that not only interprets meanings from their practices, but also encourages such practices to be seen as valid renderings of women's understandings. I examine women's initiatives through the analysis of varying contexts. While I acknowledge the historical importance of the domestic situation as a threshold for much historic activism, women's proactivity requires a broader situational analysis. I therefore present cases of proactivity within the domestic, public and business spheres, within the two cities of Waitakere and North Shore of Auckland, New Zealand. Through the search for new progressive social identities, women's activities at the inter-personal level are a prime source of social change. It is through the recursive relationship between women as agents and the social structure, that changing interpretations of social expectations are produced, allowing for creative activism. While women's initiatives may aim to transform particular social environments, they become part of the incremental process of change that alters the experience and structure of women's lives. The thesis has four parts. The first outlines the scope, objectives and theoretical framework, while the second conceptualises women's agency and its positioning within social gendered structures. Part Three presents the investigative processes linking the theoretical framework and the empirical analysis. Part Four submits the thematic interpretations of the thesis, concluding that women can be agents of social change in a diversity of ways. I acknowledge my feminist stance, one with layerings of objectives and motivations. I view women's circumstances as resulting from the interweaving of structural forces and personal capacities. The resulting awareness of women's experiences can challenge the values and concepts of masculine discourses. This is viewed through the concept of multiplicity. On a political level this means creating a resistance to hierarchies and a commitment to a plurality of voice, style and structure. / Subscription resource available via Digital Dissertations only.