Global ETD Search

1	A Method for Interpreting the In-Situ Consolidation State of Surficial Seabed Sediments using a Free-Fall Penetrometer Dorvinen, Jared Ian 13 October 2016 (has links) Free-fall penetrometers (FFP) are useful instruments for the rapid characterization of seabed sediments. However, the interpretation of FFP data remains largely a skilled task. In order to increase the reliability of results obtained using these instruments, in both expert and non-expert hands, it is advantageous to establish well defined and repeatable procedures for instrument use and data interpretation. The purpose of this research was therefore to develop and refine methods for the interpretation of FFP data. Data were gathered with the FFP Nimrod during two surveys following dredging in Sydney Harbour, Nova Scotia. The challenge of interpreting the data from these two surveys in an efficient and consistent manner was the basis of this work and led to the development of new techniques for improving resolution of the mud-line, identifying areas of erosion and deposition, and qualitatively evaluating the consolidation state of cohesive marine sediments. The method developed for improving the resolution of the mud-line simply describes a procedure of combining the data from different accelerometers with different accuracies and ranges to more clearly define the point of impact with the sea-floor. The method developed to evaluate in-situ sediment consolidation state combines theories of self-weight consolidation and ultimate bearing capacity to predict a range of potential bearing capacities for normally consolidated cohesive sediments. Finally, by combining the previous two methods a third method is proposed for locating areas of potential erosion and deposition. / Master of Science free-fall penetrometer sediment consolidation erosion dredged sediment
2	Characterization of Dredged Sediment Used in Coastal Restoration and Marsh Creation Projects Mattson, Gregory A, II 16 May 2014 (has links) To minimize coastal land loss and create new land, dredged sediment has been in use in coastal Louisiana during the last several years. Engineering properties and material characteristics of dredged material are input parameters in several mathematical models used to predict the long-term hydrodynamic behavior of the coast. Therefore, proper characterization of the dredged material is of utmost importance in the correct design of coastal restoration and land creation projects. The sedimentation characteristics of the dredged material, among other factors, depends on the (a) grain size distribution of the dredged material, (b) salinity (fresh, brackish, or saltwater environment) of the composite slurry, and (c) concentration of the solid particles in the slurry. In this research, dredged sediments obtained from actual coastal restoration projects were characterized. Furthermore, the effects of grain size distribution, salinity and solid particle concentration on sedimentation characteristics have been evaluated. restoration dredged sediment slurry sedimentation TSS and Turbidity settling velocity Civil Engineering Geotechnical Engineering
3	Determining Preliminary Components for a Landfill Evapotranspiration Cover Barnswell, Kristopher D. 17 June 2010 (has links) No description available. Environmental Science Dredged sediment evapotranspiration cover habitat restoration landfills native plant species percolation
4	Assessing the Effects of Lake Dredged Sediments on Soil Health: Agricultural and Environmental Implications on Midwest Ohio Brigham, Russell D. 10 August 2020 (has links) No description available. Geochemistry Geology Agriculture Environmental Science Soil Sciences dredge dredged sediment Lake Erie nutrients nitrogen phosphorous organic inorganic carbon nitrate phosphate greenhouse farm soil soybean biomass cation exchange capacity CEC pH bulk density calcium magnesium potassium

1

Page generated in 0.0874 seconds