Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 294 for “"geomorphic"”.
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Quantifying forearc deformation patterns using coastal geomorphic markers
… used to estimate permanent deformation from geomorphic markers, like marine terraces, have remained qualitative and are based on unrepeatable methods. This contrasts with the increasing resolution of digital elevation models, such as Light Detection and Ranging (LiDAR) and high-resolution …
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Geomorphic Equations and Methods for Natural Channel Design
… with drainage areas less than 30 sq miles. Geomorphic measurements from the reference reaches are used to verify previously published relationships between bankfull discharge and bankfull width for streams with sand and gravel beds. A new relationship is developed demonstrating the …
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Quantifying Geomorphic Features: Relative Albedos, Skeletonization, and Multifractality
… I provide an example in which (semi)qualitative geomorphic observations directly motivate quantitative analyses that in turn provide insights into the enigmatic nature of RSL. Specifically, these analyses suggest that RSL at the study site are more likely formed by dry granular flows than by …
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GEOSPATIAL MODELLING OF PRAIRIE RIVERS: LINKING PHYSICAL INDICATORS OF FISH HABITAT TO LARGE SCALE GEOMORPHIC PATTERNS IN RIVER SYSTEMS USING GEOMORPHIC RESPONSE UNITS (GRU)
… links such characteristics has been lacking. The Geomorphic Response Unit (GRU) method provides a novel approach to identifying large scale patterns in geomorphic character that provide a link between the hydrological regime and different habitat types to which species respond. Specifically, I …
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Remote sensing for geomorphic and hydrodynamic modeling and process understanding
River discharge and geomorphic processes controlling floodplain-river interactions are fundamental measures of fluvial geomorphology and important inputs and considerations for hydrodynamic modeling. Due to our anthropogenic dependency and interconnection with rivers, humans have developed …
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Changes in Geomorphic Equilibrium on Furnace Run, Summit County, Ohio
… examine and interpret present-day and historical geomorphic conditions on Lower Furnace Run in order to explain changes in stream equilibrium conditions. Equilibrium conditions can be altered by changes in land use and precipitation, and this study hypothesizes that climatically-induced changes in …
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Upstream Geomorphic Response to Dam Removal: The Blackfoot River, Montana
As dam removal is increasingly used as a tool to restore rivers, developing a conceptual and field-based understanding of the upstream fluvial response is critical. Using empirical data and modeling, I investigated the spatial and temporal pattern of reservoir sediment erosion and upstream channel …
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Upstream Geomorphic Response to Dam Removal: The Blackfoot River, Montana
As dam removal is increasingly used as a tool to restore rivers, developing a conceptual and field-based understanding of the upstream fluvial response is critical. Using empirical data and modeling, I investigated the spatial and temporal pattern of reservoir sediment erosion and upstream channel …
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Geomorphic Concrete : Material and fabrication strategies for heterogeneous concrete morphology
… condition of the future. This thesis introduces geomorphic concrete, an alternative design approach and construction methodology closely aligned with geological formation process by incorporating natural forces as collaborators in concrete fabrication. Geomorphic concrete is an alternate paradigm …
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Geomorphic History of the Atchafalaya Backwater Area: Upper Deltaic Plain Development
… forming distributary systems and lobes. Detailed geomorphic mapping and chronologic reconstruction within the Atchafalaya Backwater Area of the upper deltaic plain of the Mississippi River has led to the recognition of a complex network of distributary development related to three distinct …
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Geomorphic analyses of young faulting and fault behavior in central Nevada.
… Nevada during the Holocene were assessed through geomorphic and geologic studies of young fault scarps. Ages of paleoseismic events were estimated primarily through analyses of fault scarp morphologies and characterization and quantification of soil development associated with alluvial surfaces. …
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Comparative Lineament and Geomorphic Analysis of Chaotic Terrains and Noctis Labyrinthus, Mars
<p>Noctis Labyrinthus (NL) is an extensional trough network connecting the Tharsis rise and Valles Marineris on Mars. Chaotic terrains are a group of polygonally-fractured surface features commonly associated with subsidence due to rapid fluid loss within the subsurface. Polygonal surface patterns …
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Geomorphic and thermochronologic signatures of active tectonics in the central Nepalese Himalaya
The central Nepalese Himalaya are characterized by a sharp transition in physiography that does not correlate with previously mapped faults. Rates of rock uplift, erosion, and exhumation for rocks surrounding this physiographic transition are investigated using digital topographic data, ⁴⁰Ar/³⁹Ar …
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Climatic and Geomorphic Interactions on Alluvial Fans in the Atacama Desert, Chile
Alluvial fan surfaces in the Atacama Desert of northern Chile preserve evidence of recent, precipitation-driven, surface flows. Determining the hydrologic characteristics of these flows is important for understanding the effects of rare yet significant storms in the region. Flow reconstruction, …
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Non-perennial streamflow & geomorphic patterns in a semi-arid rangeland slated for development
Urbanization has widely recognizable impacts on stream morphology and flow patterns. Predicting and quantifying these impacts can be difficult, especially for non-perennial streams in semi-arid rangelands. Non-perennial streams tend to lack a historical baseline with complete records of streamflow …
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Geomorphic modeling and routing improvements for GIS-based watershed assessment in arid regions.
… is capable of simulating runoff, erosion, and geomorphic response in the channel network for multiple consecutive events. A diffusion-wave routing subroutine was developed for the Kinematic Runoff and Erosion Model (K_INEROS2) using a four-point iterative solution to the modified …
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The Influence of Fluvial Geomorphic Processes on Spatial Patterns of Forest Primary Succession
… in the southeastern US. I hypothesized that geomorphic processes associated with river planform cause patterns of tree species to vary predictably along point bars as well as with increasing age of land during forest primary succession. By mapping trees and seedlings I determined that common …
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Structural, thermal, and geomorphic evolution of the eastern margin of the Tibetan Plateau
The eastern margin of the Tibetan Plateau adjacent to and north of the Sichuan Basin poses a fundamental geodynamic problem; the topography of eastern Tibet apparently developed in the absence of significant shortening of the upper crust. This study investigates the development and subsequent …
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Cenozoic tectonic and geomorphic evolution of the Red River Region, Yunnan Province, China
(cont.) Xianshuihe-Xiaojiang fault system during growth of the southeast plateau margin. Cosmogenic ²⁶A1 and ¹⁰Be basin-wide erosion rate and burial ages indicate a background incision rate of [approximately] 0.05 to 0.10 mm/a, lower than the long-term incision rate minimum of [approximately] 0.26 …
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