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 40 for “"low relief"”.
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Numerical modeling of groundwater-driven stream network evolution in low-relief areas
… are observed to grow in unchannelized areas of low relief despite the low potential energy for erosion in these areas of low slope. Under these low slope conditions significant channel growth only occurs when water is collected and flows as concentrated discharge in specific areas. Previous work …
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Influence of structural variability on glacially-eroded steps, Uinta Mountains, UT
… of tall, steep, cliffs (~10m high) separated by low relief areas, which are often occupied by lakes. Directly opposite these valleys, on the northern slopes of the range, the profiles are quite different. Here, the terrain is less steep with intermittent short cliffs (~1m) separating broad, low …
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Late Cenozoic uplift of southeastern Tibet
… DEM analysis show that remnant, local areas of a low-relief land scape (or "erosion surface") are geographically continuous across the southeastern Tibetan Plateau margin and can be correlated in order to define the maximum envelope of topogra phy of the margin itself. This observation contradicts …
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Positional accuracy in a natural resource database: comparison of a single-photo resection versus affine registration
… from topographic maps and aerial photographs followed by an affine transformation, and manual digitizing from aerial photographs while applying a single-photo space resection. Two study sites, one in low terrain relief and one in high terrain relief, were used to examine the effects of terrain on …
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Futurity
… geometry, and high craftsmanship. Within these low-relief works, dimension, depth, and mirrored luminosity arise from an ongoing dialogue between digital design and human craftsmanship. The objective is to make both approaches more visible by setting up a dichotomy. The act of creating, working …
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The marine geology of Walker Bay, off Hermanus, SW Cape, South Africa
… Group rock outcrops with relatively high relief, occupying approximately 45 percent of the study area. Facies 2 represents similar outcrops but with low relief and partially covered by a thin veneer of unconsolidated sediment, including localized occurrences of loose cobbles and boulders. …
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Geological mapping of the inner shelf off Cape Town's Atlantic Seaboard, South Africa
… interspersed sandy pocket beaches. A narrow, low-lying coastal plain (marine terrace) in the north merges with coastal cliffs further south. The geomorphology and sedimentology of the coast are closely linked to the underlying geology, influencing the shape of coastal embayments and …
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A Multidisciplinary Approach for Determining the Extents of the Beds of Complex Natural Lakes in Louisiana
… its 20-foot variation in water levels, and its low-relief perimeter. Geology, geomorphology, hydrology, archaeology, vegetation, dendrochronology and dendrohydrology of the ancient cypress fringe, nineteenth century land survey records, historical records, and time-series statistics were applied …
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Towards Systematic Selection of Terrain- and Ground Cover-Specific LiDAR Filtering Parameters
… important in areas characterized by extremely low relief, such as the Little Red River Irrigation Project Area in central Arkansas. In this kind of landscape, analyses such as hydrological flow models are sensitive to small changes in the topography, and therefore prone to errors in the …
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Hydrologic simulation of storm water detention storage in an urbanizing flood-plan
… exist where high rainfall intensities and low topographic relief combine with rapid urban development to produce potential flooding. Traditional approaches to flood control emphasize channelization of main streams and laterals to speed urban runoff out of developed areas. However, in low …
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The role of wind and water in shaping earth's plateaus
… orogenic plateaus - prominent high-elevation, low relief sectors in the interior of Cenozoic mountain belts. In particular, the feedbacks between surface uplift, the build-up of topography and ensuing changes in precipitation, erosion, and vegetation patterns are addressed in light of past and …
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Sedimentology, Stratigraphic Evolution and Provenance of the Cambrian – Lower Ordovician Potsdam Group in the Ottawa Embayment and Quebec Basin
The Cambrian – Lower Ordovician Potsdam Group is a mostly siliciclastic unit that provides important insight into the paleoenvironmental, geologic and tectonic history of Early Paleozoic Laurentia. Nevertheless, in spite of 178 years of study the Potsdam in the Ottawa Embayment and Quebec Basin …
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Evolution of transient topography on passive margins: A study of landscape disequilibrium in the southern Appalachian Mountains
… Appalachian Mountains have maintained moderate relief some ~300 Myr after the cessation of mountain building has long puzzled geomorphologists. As recent studies have shown that Appalachian exhumation has occurred at slow rates consistent with isostatic rebound of thickened crust, the driving …
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A comparison of the seismicity and regional geology of the southeastern United States and southeastern Australia
… topographically and geologically by low relief, Paleozoic mountain belts that parallel continental margins formed by rifting. Interestingly, there are also remarkable similarities in the seismicity of the two areas. To characterize the temporal aspects of seismicity, the recurrence …
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The geochemistry of water-filled sinkholes at Bitter Lake National Wildlife Refuge, Roswell, NM : implications for hydrochemical evolution and trophic support
… Roswell Artesian Basin, recharged by upwardly flowing artesian springs. Constant head is confirmed by a lack of measured change in depth during two sampling sessions (October 2008, May 2009), low relief (<10m change across study area), and deployment of autonomous sensors (sondes). Sinkhole …
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QUANTIFYING EFFECTS OF SEASONAL INUNDATION ON METHANE FLUXES FROM FORESTED FRESHWATER WETLANDS
… detecting and modeling surface water dynamics in low relief landscapes will improve our ability to quantify methane emissions.
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Fish Assemblage Structure, Distribution, and Trophic Ecology at Northwestern Gulf of Mexico Banks
… in a region that is generally characterized by low relief, soft sediments. The habitat value of many of these banks has led to their designation as Habitat Areas of Particular Concern (HAPC) and the Flower Garden Banks National Marine Sanctuary (FGBNMS). However, little is known about the …
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Characterizing Hydrological Balance and Hydrochemistry of a Chronosequence of Newly Formed Wetlands within the Athabasca Oil Sands Region using Isotopic and Geochemical Tracers
… considered ‘reference’ comparators. The region’s low-relief and wetland-dominated landscapes rendered traditional hydrological methods difficult to implement, so stable isotopes and geochemical tracers were used to infer the water balances. Isotope hydrological balances measured as Evaporation: …
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Suspended sediment supply dominated by channel processes in a low-gradient agricultural watershed, Wildcat Slough, Fisher, IL, USA
… use types entering into the Wildcat Slough, a low gradient, intensively managed 61.3 km2 watershed in the Upper Sangamon River Basin in central Illinois, USA. The land is primarily used for agriculture, but forests, floodplains, banks, a restored prairie and grasslands, and a pasture are also …
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