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Articles 1 - 6 of 6
Full-Text Articles in Physical and Environmental Geography
Visualizing Barrier Dune Topographic State Space And Inference Of Resilience Properties, Li-Chih Hsu
Visualizing Barrier Dune Topographic State Space And Inference Of Resilience Properties, Li-Chih Hsu
Theses and Dissertations--Geography
The linkage between barrier island morphologies and dune topographies, vegetation, and biogeomorphic feedbacks, has been examined. The two-fold stability domain (i.e., overwash-resisting and overwash-reinforcing stability domains) model from case studies in a couple of islands along the Georgia Bight and Virginia coast has been proposed to examine the resilience properties in the barrier dune systems. Thus, there is a need to examine geographic variations in the dune topography among and within islands. Meanwhile, previous studies just analyzed and compared dune topographies based on transect-based point elevations or dune crest elevations; therefore, it is necessary to further examine dune topography in …
Accounting For Spatial Autocorrelation In Modeling The Distribution Of Water Quality Variables, Lorrayne Miralha
Accounting For Spatial Autocorrelation In Modeling The Distribution Of Water Quality Variables, Lorrayne Miralha
Theses and Dissertations--Geography
Several studies in hydrology have reported differences in outcomes between models in which spatial autocorrelation (SAC) is accounted for and those in which SAC is not. However, the capacity to predict the magnitude of such differences is still ambiguous. In this thesis, I hypothesized that SAC, inherently possessed by a response variable, influences spatial modeling outcomes. I selected ten watersheds in the USA and analyzed them to determine whether water quality variables with higher Moran’s I values undergo greater increases in the coefficient of determination (R²) and greater decreases in residual SAC (rSAC) after spatial modeling. I compared non-spatial ordinary …
Impermeable Assemblages: Flooding, Urban Infrastructure, And Stormwater Politics In São Paulo, Brazil, Nate Millington
Impermeable Assemblages: Flooding, Urban Infrastructure, And Stormwater Politics In São Paulo, Brazil, Nate Millington
Theses and Dissertations--Geography
This project analyzes efforts to remake the relationship between water and city in São Paulo, Brazil. Currently experiencing overlapping problems of flooding, scarcity, and pollution, São Paulo illustrates the challenges of managing water in a contemporary mega-city. This dissertation subsequently considers the city’s water management through an approach that borrows from urban political ecology, social studies of science, and post-colonial urban theory. With an epistemological grounding in these literatures, this project analyzes ongoing conversations about water management in São Paulo, and focuses on how water is encountered and engaged with in the landscape by engineers, artists, and activists. This project …
Changing States: Using State-And-Transition Models To Evaluate Channel Evolution Following Dam Removal Along The Clark Fork River, Montana, Christopher Van Dyke
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 …
Biomechanical Effects Of Trees And Soil Thickness In The Cumberland Plateau, Michael Shouse
Biomechanical Effects Of Trees And Soil Thickness In The Cumberland Plateau, Michael Shouse
Theses and Dissertations--Geography
Previous research in the Ouachita Mountains, Arkansas suggests that, on relatively thin soils overlying bedrock, individual trees locally thicken the regolith by root penetration into bedrock. However, that work was conducted mainly in areas of strongly dipping and contorted rock, where joints and bedding planes susceptible to root penetration are more common and accessible. This project extended this concept to the Cumberland Plateau, Kentucky, with flat, level-bedded sedimentary rocks. Spatial variability of soil thickness was quantified at three nested spatial scales, and statistical relationships with other potential influences of thickness were examined. In addition, soil depth beneath trees was compared …
Convergence Of Dune Topography Among Multiple Barrier Island Morphologies, Jackie Ann Monge
Convergence Of Dune Topography Among Multiple Barrier Island Morphologies, Jackie Ann Monge
Theses and Dissertations--Geography
Wave-dominated and mixed tidal and wave energy barrier islands are assumed to have characteristic dune topographies that link to their macroscale form. However, there has been no systematic attempt to describe the linkage between barrier island macroscale form and dune topography. The goal of this thesis was to investigate how dune topographies correspond to a number of barrier island morphologies found along the southeastern U.S. Atlantic coast. Macroscale process-form variables were used to classify 77 islands into seven morphologic clusters. Islands from each cluster were selected and sites characteristic of the range of dune topographies within islands were characterized using …