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 606 for “"fluvial"”.
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Statistical Analysis of Fluvial Channel Belts
… provide information about the formation of fluvial channel belts and the petroleum reservoirs they can create.</p>
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Fluvial sedimentation in continental half-graben basins
The stratigraphic architecture of intracontinental rift basins is defined by a dynamic relationship between depositional belts associated with the basin floor and flanking tributary streams on the piedmont. Spatiotemporal distributions of these deposits are sensitive to basin geometry, subsidence …
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Recent fluvial geology in western North Dakota
<p> The thesis here abstracted was written under the direction of Lee Clayton and approved by Walter L. Moore -and John R. Reid as members of the examining connnittee, of which Mr. Clayton was chairman. </p><p> In western North Dakota many drainage channels that are incised into valley fill are …
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The fluvial dynamics of compound meander bends
The dynamic evolution of the planform of meandering rivers often leads to the development of compound loops with multiple lobes of maximum curvature, also known as compound meander bends. At present, the interaction among spatial patterns of mean flow, turbulence, bed morphology, bank failures and …
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The fluvial dynamics of confluent meander bends
Planform geometry is a controlling factor that influences flow structure, sediment transport, and bed morphology at river confluences. Previous experimental, field, and modeling studies of confluence dynamics have focused mainly on junctions formed by straight approach channels that meet at angular …
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The fluvial biology of Lake Taupo rainbow trout
The riverine biology of adfluvial-lacustrine rainbow trout (Oncorhynchus mykiss, previously Salmo gairdneri) from the Waimarino, Tokaanu, and Hinemaiaia Rivers was investigated. These three streams are important spawning and rearing habitats for rainbow trout recruiting to an economically important …
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Slope and bifurcation on braided distributive fluvial systems
Much of the current literature on ancient fluvial systems is based on studies of modern rivers, but fails to differentiate between degradational and aggradational systems. That is a problem because degradational systems are not preserved and therefore are not representative of fluvial systems found …
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Satellite indices of fluvial influence in coastal waters
… From this work, satellite-based indices of fluvial influence (IFI), are developed which contain information on the spatial extent of riverine constituents in coastal waters. The IFI is defined as the correlation between time series of riverine discharge and an ocean color satellite-derived …
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Fluvial systems : a re-evaluation of Horton's laws
<p>The number of different order streams entering a channel of known order can be approximated by a geometric progression similar to the Law of Stream Numbers. Hence, the frequency and order of different size tributaries along any channel can be described by a single parameter. Similarly, the …
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Fluvial geomorphology and paleofloods in arid central Australia
This thesis examines the fluvial geomorphology of the Todd River(9,300 km2) in arid central Australia. It describes the morphology, motphostratigraphy, dimentary characteristics and chronology of the modern flood plain and paleoflood complexes, and discusses the geomorphic effects of high magnitude …
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Fluvial geomorphology and paleofloods in arid central Australia
This thesis examines the fluvial geomorphology of the Todd River(9,300 km2) in arid central Australia. It describes the morphology, motphostratigraphy, dimentary characteristics and chronology of the modern flood plain and paleoflood complexes, and discusses the geomorphic effects of high magnitude …
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Fluvial bedrock abrasion by bedload : process and form
… and horizontal lee surfaces. The process of fluvial bedrock abrasion by bedload was isolated in a flume study. In a parallel approach, the microsurface texture and morphological evolution of rock blocks abraded by cobble and pebble grade bedload was investigated. The control by grain calibre, …
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Quantitative Analysis of River Profiles and Fluvial Landscapes
… of stream piracy, divide migration and interfluvial erosion are also ignored. Here, I investigate the general validity of these assumptions. First, I jointly invert >3200 Asian river profiles for uplift. When erosional parameters are calibrated, the recovered uplift history supports models of …
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Plant organic matter mobilization and export in fluvial systems
… I tested if δD values of plant waxes in fluvial deposits reflect δD values of environmental waters in the respective catchments. I showed that surface water δD values in the Arun Valley and precipitation δD from south of the Himalaya both changed similarly during two consecutive years …
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Terrestrial Laser Scanning for Quantifying Uncertainty in Fluvial Applications
… using TLS as a reference dataset for two fluvial applications: 1) measuring streambank retreat (SBR) for sediment load calculations; and 2) measuring topography for habitat complexity quantification. The third objective was to apply knowledge uncertainties and stochastic variability to the …
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Fluvial Depositional Processes of a Tropical River, Colombia, South America
<p>Fluvial depositional processes along the Rio Magui in south-western Columbia are primarily controlled by localized uplift downstream of the mouth of the river, sediment sources that produce both coarse-and-fine-grained load, and numerous over-bank flows caused by torrential rainfall.</p>
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WASH OUT: FLUVIAL FORMS AND PROCESSES ON THE AMERICAN FRONTIERS
Frontierism as asserted in the policies of Manifest Destiny, and nurtured within subsequent U.S. expansion and global aggression, remains a vital force in dominant U.S. environmental writing and environmental politics, even as locatable frontiers shift, turn inward, or abstract themselves. All …
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WASH OUT: FLUVIAL FORMS AND PROCESSES ON THE AMERICAN FRONTIERS
Frontierism as asserted in the policies of Manifest Destiny, and nurtured within subsequent U.S. expansion and global aggression, remains a vital force in dominant U.S. environmental writing and environmental politics, even as locatable frontiers shift, turn inward, or abstract themselves. All …
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Ecology and biogeochemistry of fluvial microphytobenthic communities on soft sediments
Freshwater ecosystems are the link between the terrestrial and the marine biomes. Terrestrially-derived nutrients travel through, and are transformed within these ecosystems, outflowing eventually to the sea. A major player in small rivers are microphytobenthic (MPB) communities - groups of algae, …
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Channel Morphology and Riparian Vegetation Influences on Fluvial Aquatic Habitat
As public awareness of river degradation has grown in recent years, the number of stream restoration activities has increased dramatically. Anthropogenic influences at a range of spatial scales from watershed landuse to riparian vegetation management to local channel morphology can have …
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