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Showing 1 to 20 of 33 for “"sediment properties"”.
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Correlation of Electron Donor Concentrations in Sediments with Sediment Properties: New Providence, Iowa
The concentrations of electron donors in aquifer sediments are important in understanding the fate and transport of redox-sensitive constituents in ground water, such as nitrate. In this study, 50 sediment samples were collected from below the water table from 11 boreholes at the US Geological …
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Flow and sediment properties influencing erosion of fine-grained marine sediments : sea floor and laboratory experiments
Erosion processes involving fine-grained marine sediments were studied by using an in situ flume to erode undisturbed bottom sediments on the sea floor in Buzzards Bay, a shallow marine embayment off the Massachusetts coast. Tte muddy sea floor in that area is characterized by a deposit-feeding …
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Flow and sediment properties influencing erosion of fine-grained marine sediments : sea floor and laboratory experiments.
Thesis. 1975. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Investigation of the Relationships Between Geotechnical Sediment Properties and Sediment Dynamics Using Geotechnical and Geophysical Field Measurements
Seabed surface sediments vary with active geomorphodynamics and sediment remobilization processes. Understanding relations between geotechnical sediment properties and sediment mobilization processes can potentially improve predictions of coastal erosion and hazard mitigation. Portable free fall …
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Managed realignment in the Humber estuary: factors influencing sedimentation
… the fast accretion rates at PHS, researches the sediment properties, calculates a sediment budget and produces a conceptual model for fast accreting managed realignment sites. Results have shown that the initial fast accretion rates continued on the site to the end of the monitoring period five …
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Influence of Geotechnical Properties on Sediment Dynamics, Erodibility, and Geomorphodynamics in Coastal Environments Based on Field Measurements
Geotechnical sediment properties such as moisture content, relative density, bearing capacity, and undrained shear strength have been discussed in the context of coastal sediment dynamics. However, these properties have rarely been assessed in their respective relevance or quantitatively related to …
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The influence of macrofauna on intertidal sediment stability and biogeochemical properties.
… known to have a significant effect on intertidal sediment stability and biogeochemical properties. A series of manipulative in situ mudflat studies at Breydon Water, Great Yarmouth, UK investigated the effect of biodiversity on selected biogeochemical sedimentary properties related to mudflat …
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The Effects of Benthic Organisms on Intertidal Sediment Erodibility
… disturbance recovery. The erosion of surface sediments is also vital to benthic-pelagic coupling, where resuspended microbes and organic material become available to suspension feeders and/or transported to adjacent habitats. On sandflats, the organisms living within sediments have been proven …
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Analysis of modal evolution caused by a weakly range-dependent seabed in shallow water and its application to inversion for geoacoustic properties
… the range-dependent variation of the geoacoustic properties of the seabed is one of the crucial factors affecting sound propagation. Since the local modes of propagation depend on the spatial changes in the bottom sediments, the local eigenvalues of these modes are useful as tools for examining …
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Changes in benthic ecosystem properties and functions across sedimentary gradients in estuaries
In estuaries, sediment properties dominate the inhabiting flora and fauna and their role in energy flows and nutrient cycling. Whilst sediment transport is a natural, key process, human intervention in estuaries and their catchments has altered the regime of terrigenous sediment loading and pose …
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Experimental Study of Pathogenic Microorganism Resuspension from Mobile Bed Sediment in Irrigational Canals
Pathogens in an interactive water-sediment environment are present as free agents in water or attachments to sediment particles. The resuspension of pathogens from bed sediment in irrigation canals impairs the quality of overlaying water and can result in the contamination of fresh produces. …
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Methane Gas Hydrate Morphology and its Effect on the Stiffness and Damping of some Sediments
… are ice–like compounds found in deep sea sediments and permafrosts. Concise detection<br/>and quantification of natural methane gas hydrate deposits, will allow for a more robust assessment<br/>of gas hydrate as a potential energy resource or natural geohazard. Current seismic methods, …
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The influence of a petrochemical discharge on the bioturbation and erosion potential of an intertidal estuarine mudflat (Humber estuary, UK)
The influence of sedimentary variables on the structure and function of infaunal estuarine and marine communities is well studied but less is known of the influence of biota on sediment properties. Feeding and burrowing activity, locomotion, the production of faecal pellets and biological …
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A HYDROLOGICAL INVESTIGATION OF THREE DEVON SAND DUNE SYSTEMS; BRAUNTON BURROWS, NORTHAM BURROWS AND DAWLISH WARREN
… the tide, the underlying geology and sediment properties. The groundwater system at Braunton was mounded, with effective inputs accumulating over an impermeable basal layer close to mean sea level. The system was very sensitive to seasonal variability in effective precipitation. At the …
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Rare Earth Elements as a Tracer to Understand Sediment Fate and Transport in Small Streams
Sediment is a major source of water quality impairment in streams, rivers and lakes in the US. However, sediment fate and transport in small streams is poorly understood. Previous attempts to characterize sediment transport often insufficiently represented the physical and chemical sediment …
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Dynamic chamber system for determining equilibrium phosphorus concentration (EPC0) in sediments
… those adjacent to agricultural lands. The bed sediment of such tributaries can act as both a sink and source of inorganic reactive phosphorus and thus modify the amount of P received by downstream lakes. The sorptive capacity of sediments for P is commonly determined by measuring the …
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High-Resolution Seismic Characterization of Shallow Sedimentary Structure for Freshwater Resources and Karstic Voids
… characterization of near-surface coastal sediments, and the development of novel methodologies for subsurface void detection. The research integrates various geophysical measurements and numerical modeling to address these multifaceted objectives. First, the field performance of two …
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Chemical heterogeneity of glaciofluvial deposits: Outcrop study and implications for reactive transport
<p>Spatial variations in the reactive properties of geologic systems and their influence on contaminant transport are poorly understood. Consequently, an outcrop study was conducted in a glaciofluvial deposit in Deerfield, New Hampshire in order to: (1) identify the sediment properties controlling …
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