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 99 for “"Dredging"”.
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Marine Aggregate Dredging: A New Regional Approach to Environmental Monitoring
… subject of this thesis is the marine aggregate dredging industry, and specifically the approach taken to the monitoring of environmental effects on the seabed. The thesis forms the evidence required to allow the author to be examined for a PhD by Publication, and comprises of a list of the …
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Influences of Channel Dredging on Avulsion Potential at the Atchafalaya River
… yet fails to assess the largescale channel dredging operations conducted throughout the Atchafalaya River Basin during the 1930's and 1940's as a potential cause for the increased discharge. To assess the role man-made interventions, specifically channel dredging, played in the increase of …
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THE FEASIBILITY OF USING WEB-BASED TECHNOLOGY FOR THE MANAGEMENT OF DREDGING PROJECTS
… using web-based project management systems for dredging. To achieve this objective the research assessed both the positive and negative aspects of using web-based technology for the management of dredging projects. Information gained from literature review and prior investigations of dredging …
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Ecological effects of turbidity variations in and around dredging areas in the Port of Tauranga
… areas as well as resuspension from storms and dredging activities along coastlines. Although increased turbidity has the potential to affect coastal ecosystems, the interactions of different drivers have been poorly investigated. The objective of this study was to understand the sources, …
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<i>Dredging Day </i>and a trauma-informed reading of <i>Whereas</i> by Layli Long Soldier
… does not map directly on the creative component, Dredging Day, there are clear thematic resonances. The exploration of our unstable and multi-directional relationships with land and language, and the personal experience of parenthood and family relationships in Dredging Day tie the critical and …
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An evaluation of the standard elutriate test as an estimator of contaminant release at the point of dredging
… the potential release of pollutants during the dredging process has recently come under the scrunity of federal and state regulatory agencies. The mechanical action of a dredging operations causes resuspension of sediment particles and release of soluble contaminants to the water column. A …
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Suction Dredge Mining Impacts on Pacific Lamprey Populations and Habitat in Washington State: A Case Study of the Entiat River
… significant impacts to aquatic habitat. Although dredging has the potential to cause widespread ecological effects, only impacts to select species have been thoroughly assessed. Due to their reliance on freshwater habitat throughout multiple life stages, Pacific lamprey are significantly …
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Mitigation Strategies for Developed Areas of Galveston Bay
… 1990). Of the human impacts affecting wetlands, dredging and dredge-related activities are perhaps the most significant (Salveson, 1990). This study analyzes and evaluates mitigation strategies for managing wetlands influenced by dredging activities associated with development. Additionally, the …
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Geotextile Tubes and Their Application to Dewatering
… for dewatering of sediment or sludge from dredging operations. Common applications include: removal of solids from municipal water and waste water treatment, agricultural remediation, marine dredging operations, construction dewatering, and beach preservation and protection. Geotextile …
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Modeling of the fate of lead due to the removal of corroded sub-marine cables in aquatic environments
… when assessing the potential risk of dredging and removal activities. In this research, the effect of various physical factors on the release and dispersion of lead from corroded sub-marine cables and bottom sediments was studied. Among these factors are the hydrological and physical …
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The benthic ecology of False Bay, with notes on the analysis of shallow-water soft substrata
… lagoons and estuaries. Field work started with dredging from hired fishing boats. It was soon obvious that one of the most important regions of the sea was escaping notice, that above the shallowest depth in which dredges could be worked and below low tide level. This region could only be …
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Long-term changes in the benthic macrofauna of Saldanha Bay
… and harbour construction, harbour extension, dredging, mining, fishing, fish-processing and mussel culture. The aims of this study were to determine whether the benthic macrofaunal communities in the Bay have been altered over this period and to explore the benthic community patterns within …
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Ecosystem impacts of intertidal invertebrate harvesting: from benthic habitats to bird predators.
… out to assess benthic impacts of ‘pump-scoop’ dredging in Poole Harbour, UK, a designated Special Protection Area under the European Union Birds Directive. The pump-scoop dredge is a novel gear type developed by local fishermen following the introduction of the manila clam Ruditapes …
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Remediation of contaminated marine sediment using bentonite, kaolin and sand as capping materials
… treatment of contaminated sediment is dredging, but this treatment is expensive and requires a large area of land for disposal. In situ capping of contaminated sediment is considered as a cheaper technique compared to dredging and efficient treatment technology to immobilize pollutants …
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Nearshore sediment dynamics in a mixed sand/mud environment
… as determined from hydrographic surveys and dredging records, was used to validate the model. The 2-cell numerical model accurately predicts channel infilling rates, and provides an insight into the governing hydrodynamical processes in northern Poverty Bay. The developed model represents an …
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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
… sediment transport for various hypothetical post-dredging scenarios. Sediment re-suspension intensity showed spatial differences along the shoal: high on the western flank of the shoal and a decrease toward the eastern shoal due to the change in shoal bathymetry. The results indicated a favor for …
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Working with large-scale population trend data in ecology and conservation: methods and applications
… tion trends, explore methods to combat data dredging and combine my findings to conduct the largest ever robust assessment of protected area effectiveness In Chapter 2 I take the highest quality trends from the waterbird dataset, and artifi- cially degrade them to understand how likely …
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The potential alternative uses of dredged material in the Humber Estuary
… behind along the banks of the Humber.Maintenance dredging involves the removal of the recently settled sediment that contributes to the sediment budget (sediment within a system at one time including the sources, sinks and processes). Therefore only those options that allow the sediment to remain …
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