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 18 of 18 for “"Fluvial sediments"”.
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Measurements Of Fluvial Sediments Using A Single-Frequency Acoustic Attenuation System
Suspended sediments are a global-scale pollutant that threaten the integrity of our waterways and pose an environmental threat to many aquatic ecosystems. Innovative techniques are required to continuously monitor this pollutant. Ultrasonic acoustic measurements have the potential to improve the …
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A comparative analysis of terrestrial laser scanning (TLS) and structure from motion (SfM) photogrammetry for measuring fluvial sediments
A precise, time-efficient, cost-effective method for quantifying riverbed roughness and sediment size distribution has hitherto eluded river scientists. Traditional techniques (e.g., Wolman counts) have high potential for error brought about by operator bias and subjectivity when presented with …
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Bottom boundary layer physics and sediment transport along a transgressive sand body, Ship Shoal, south-central Louisiana: implications for fluvial sediments and winter storms
… known regarding such dynamics, in concert with fluvial sediments and winter storms, influenced in unique ecosystems, and likely in future potential sand mining. This dissertation addresses such the morphodynamics and sedimentary processes and their implications for the mining from the shoal …
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A Uintan (Late Middle Eocene) Flora and Fauna from the Uinta Basin, Utah
… specimens are preserved in late stage Uinta Lake sediments and coarse-grained fluvial sediments which are stratigraphically 650 to 660 m above the Green River Formation. Deposition rates estimates of 18 to 55 cm/kyr, for Uinta Lake sediments in the Uinta Basin suggest a period of 1.18 Ma to 3.69 …
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GEOMORPHOLOGICAL MAPPING OF THE K2 AREA, PAKISTAN USING GIS AND REMOTE SENSING
… of glaciation, mass movement denudation, and fluvial erosion in landscape development. A series of thirteen 1:100,000 geomorphological maps covering the area between Skardu and K2 were produced using field mapping and photography, GPS measurements, ASTER satellite imagery, and digital …
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GEOMORPHOLOGICAL MAPPING OF THE K2 AREA, PAKISTAN USING GIS AND REMOTE SENSING
… of glaciation, mass movement denudation, and fluvial erosion in landscape development. A series of thirteen 1:100,000 geomorphological maps covering the area between Skardu and K2 were produced using field mapping and photography, GPS measurements, ASTER satellite imagery, and digital …
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A study of the geochemical behaviour of anthropogenic platinum-group elements in a mixed urban-rural catchment: the River Stour, Kent, U.K.
A baseline survey of contemporary fluvial sediments in the Kentish Stour, east Kent, England, has been undertaken to document the sources and distribution patterns of anthropogenic PGE in an attempt to constrain some of the physical and chemical parameters that may influence the distribution of …
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INNOVATIVE AND CONVENTIONAL APPROACHES TO DETRITAL ZIRCON PROVENANCE ANALYSIS: LOOKING TO THE PAST, PRESENT, AND FUTURE
… is an important tool in our understanding paleo-fluvial drainages, erosion of landscapes, paleogeographic reconstructions, and regional geologic and tectonic histories. Here, we examine the utility of multiple provenance analysis techniques through their application to paleo, modern, and …
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Mid Cretaceous fossil forests of Alexander Island, Antarctica
… ° S. The fossil forests are preserved within the fluvial sediments of the Triton Point Formation of the Fossil Bluff Group, which represents the infill of a fore-arc basin. The fluvial environment matured from a braided river system, with frequent floods and unstable channel banks, to a more …
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Characterization of a volcanically impacted, overfilled continental rift basin within the southeastern Jemez Mountains, New Mexico
… lava and primary pyroclastic deposits and minor fluvial sediments. As a result, little or no coarse-grained epiclastic sediments were shed from adjacent footwall highlands and deposited into the basin along its margins, which is a trait of conventional rift basin models. Additionally, the …
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Understanding terrestrial organic carbon export : a time-series approach
… through river networks, and burial in marine sediments is a major pathway of the global carbon cycle. However, our ability to constrain these processes and fluxes is largely limited by (i) analytical capability and (ii) temporal sampling resolution. To address issue (i), here I discuss …
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Understanding terrestrial organic carbon export : a time-series approach
… through river networks, and burial in marine sediments is a major pathway of the global carbon cycle. However, our ability to constrain these processes and fluxes is largely limited by (i) analytical capability and (ii) temporal sampling resolution. To address issue (i), here I discuss …
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Structure and regional tectonic setting across the Atlantic Coastal Plain of northeastern Virginia as interpreted from reflection seismic data
… been achieved from this study. Lower Cretaceous fluvial sediments are less reflective than the overlying marine sequence. This observation is most obvious toward the east, particularly on line CF-1. Reverse faulting, which might be related to movement within the basement, is observed in at least …
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The flow and sediment of the Mlalazi estuary in Kwazulu-Natal, South Africa
… investigated the flow dynamics associated with fluvial events within the Mlalazi Estuary resulting from Q2yr, Q10yr, Q20yr, Q50yr and Q100yr flood return periods. The hydraulic modelling software, HEC-RAS (version 5.0) flow model, aided by GIS (HEC-geoRAS), was used to obtain estimates of the …
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Clarence River lowland floodplain : a morphostratigraphic analysis of a complex Holocene floodplain
… inner basin for most of the Holocene time, was fluvial dominant with resulting brackish water environment for most of the basin. The outer basin was marine dominant for most of the Holocene time. The Holocene Clarence delta prograded through the inner basin in a protruding manner similar to …
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Clarence River lowland floodplain : a morphostratigraphic analysis of a complex Holocene floodplain
… inner basin for most of the Holocene time, was fluvial dominant with resulting brackish water environment for most of the basin. The outer basin was marine dominant for most of the Holocene time. The Holocene Clarence delta prograded through the inner basin in a protruding manner similar to …