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 17 of 17 for “"Nearshore zone"”.
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Size-selective sediment transport and cross-shore profile evolution in the nearshore zone
Cross-shore bathymetric evolution in the nearshore zone often leads to threatening consequences such as beach erosion and shoreline retreat that concern the coastal community. A new, comprehensive cross-shore morphodynamic model was developed that can be used to describe and predict these …
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Climatic drivers of retrogressive thaw slump activity and resulting sediment and carbon release to the nearshore zone of Herschel Island, Yukon Territory, Canada
… including organic carbon and nitrogen, to the nearshore zone. The objective of this study was to 1) identify the climatic and geomorphological drivers of sediment-meltwater release, 2) quantify the amount of released meltwater, sediment, organic carbon and nitrogen, and 3) project the evolution …
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Assessing nearshore water quality and biological condition in the Kawartha Lakes using a community science approach
… relationships in this region are unknown. The nearshore zone is where land use has its first impacts on the lake, and provides vital habitat for most lake inhabitants at some point in their life cycle. Despite its importance, the nearshore zone is rarely monitored and further investigation is …
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Configuration of the Pleistocene Surface Beneath Cat Island, Mississippi and Implications for Barrier Island Formation and Evolution
… shallow seismic data acquired in the island's nearshore zone and interior canals, correlated with existing drillcore data, reveal that Cat Island, MS is situated over an Oxygen Isotope Stage 3 Phase 3 paleochannel located between two topographic high-grounds of the Pleistocene surface. Beach …
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Beach development and movement as a function of water waves
… wave theory and sediment transport in the nearshore zone, with special emphasis on littoral drift. The linear Airy theory for water waves is developed for the computation of longshore current, utilizing certain exact relationships for momentum flux. The near shore beach environment is …
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Advancing Arctic coastal erosion measurement and monitoring through UAV-SfM, satellite imagery, and object-based image analysis
… frozen sediment and organic carbon into the nearshore zone which affects marine ecosystems and contributes to ocean acidification. Further, the release of organic carbon from frozen sediment contribute to global greenhouse gas release which are not well understood nor included in current …
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The sedimentology and palaeoecology of the Coralline Crag (Pliocene) of Suffolk
… along the bank and was deposited in the nearshore zone. Subsequent meteoric diagenesis led to widespread dissolution of aragonitic grains. Dissolution was restricted to facies with high primary porosity which were preferentially preserved from erosion by the concomitant cementation. …
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Sediment circulation in mixed gravel and shingle bayhead beaches on the South East Dorset coast.
… fieldwork by the author. Investigations in the nearshore zone by side-scan sonar and echosounder revealed the morphological and sedimentological nature of the seafloor along the northern shore of Weymouth Bay. Sediment distribution and bedforms suggested preferred sediment transport paths. …
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Seasonal and spatial variability of pelagic fishes in relation to environmental variability in St Helena Bay
… the nursery grounds and part of the transport zone for hydrology and productivity in areas that are significant to early life history of small pelagic fish. Environmental, acoustic and zooplankton data have been collected along the SHBML to obtain information on ocean environment, pelagic fish …
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Advancement of Using Portable Free Fall Penetrometers for Geotechnical Site Characterization of Energetic Sandy Nearshore Areas
… environments and water depths, including the nearshore zone where conventional methods are challenged by energetic hydrodynamics and limited navigable depth. Moreover, PFFPs offer an opportunity to reduce the high site investigation costs associated with conventional offshore geotechnical site …
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Spatiotemporal trends and relationships in the abundance, growth, and condition of common nearshore fishes of southwest Lake Michigan
… the food web. In southwestern Lake Michigan, the nearshore zone (<10m depth) is a diverse habitat with an array of benthic substrate types and thermal regimes. Common fish species in this region include a native omnivore, the yellow perch, which represents a valuable sport fishery; the round goby, …
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The dynamics and kinematics of the coastal boundary layer off Long Island
… Moored current meter records indicate that the nearshore flow field is strongly polarized in the alongshore direction and its fluctuations are well correlated with local meteorological forcing. Complex empirical orthogonal function analysis suggests that subtidal velocity fluctuations are …
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Difference in depositional behavior of hypopycnal and hyperpycnal flows in the context of continental margins
… a tendency for sediment to deposit in the nearshore zone instead of going into deep water. This deposit could eventually build up to wave base to form a shelf-like feature, which could then be elongated along shoreline by alongshelf sediment dispersal processes.
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Gravel barrier dynamics, coastal erosion and flooding risk
… at the basin scale (TELEMAC), waves in the nearshore zone (SWAN), and hydrodynamic and morphological change at a series of cross-shore profiles along the BPBS (XBeach-Gravel). Robust calibration and validation using data collected from the 5 December 2013 storm surge is undertaken, followed …
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The modification of arctic permafrost coastlines
… in the geochemistry and biodiversity of the nearshore zone and affect the Arctic Ocean carbon cycle. To calculate estimates of organic carbon input from coastal erosion to the Arctic Ocean, current methods rely on the length of the coastline in the form of non self-similar line datasets. This …
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Coastal and sediment dynamics in a high-energy, rocky environment
… dumping of 47,000 m³ of dredged sand in a rocky nearshore zone (6-10 m depth). Sediment trap calibration experiments were also performed. Analysis of the measured wave data has identified wave-induced motion as a significant source of velocity error in p, u, v meters on taut-wire moorings, and …
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Nearshore sediment dynamics in a mixed sand/mud environment
… show the channel area passes through the beach nearshore zone, and during the monitoring period maintenance dredging only maintained the channel design depth along the channel leads, while significant infilling occurred near the channel edges (Δh = -1 m). Extrapolation of the results suggests an …