Results 261 to 270 of about 482,940 (315)

Characterization of Near Seabed Surface Sediment

All Days, 2008
Abstract Accurate measurement of the shear strength profile in the upper 1 m of soft sediments is crucial for pipeline and riser design, particularly for deep water developments. In this paper, some existing approaches for the strength characterization of seabed surficial sediments are reviewed and the conclusion ...
Han Eng Low, Mark Randolph, Cassandra Rutherford, Bernie Bernard, James Brooks   +4 more
openaire   +1 more source

Surface Phenomena in Sedimentation FFF

Journal of Liquid Chromatography & Related Technologies, 1997
Abstract The influence of the surface phenomena on the particle sedimentation in Sedimentation FFF is examined theoretically. It is shown that the tangential transport of surfactant in the particle surface layer, where the surfactant species are accumulated, causes the tangential concentration gradient of the surfactant, and the additional ...
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Determination of surface areas of sediments

Journal of Sedimentary Research, 1962
Adsorption takes place both by covalent bonding with surface ions in the crystal lattice, and by van der Waal's forces. A single layer of molecules will form over the entire surface before more layers begin to accumulate. Determination of the volume of gas needed to form a monomolecular layer of the internal surface will yield the area, with ...
F. C. Greer, C. M. Beeson, R. Main, G. V. Chilingar   +3 more
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Surface Area of Deep-Sea Sediments

The Journal of Geology, 1952
Absolute surface areas of a set of seventy-five representative deep-sea core samples have been measured by the gas-adsorption method. The values range from $2.5 m^{2}/gm$ for fine red silt to $48.0 m^{2}/gm$ for some continental clay but are characteristic of a specific sediment type.
J. Laurence Kulp, Donald R. Carr
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Computed Sediment Grain Surface Areas

SEPM Journal of Sedimentary Research, 1960
ABSTRACT Approximate sediment grain surface areas were computed for 109 natural sediment samples ranging from sands to clays. This was done by assuming all particles to be spherical and summing the areas for each size fraction in the grain size analysis, where the average diameter for the size fraction was used for all grains in the fraction.
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Sediment production from forest road surfaces

Water Resources Research, 1984
Erosion on roads is an important source of fine‐grained sediment in streams draining logged basins of the Pacific Northwest. Runoff rates and sediment concentrations from 10 road segments subject to a variety of traffic levels were monitored to produce sediment rating curves and unit hydrographs for different use levels and types of surfaces.
Leslie M. Reid, Thomas Dunne
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Surface waves and bottom sediment response

Marine Geotechnology, 1977
Abstract Field measurements of bottom oscillations and wave characteristics have been made in a study of the interaction of fine‐grained sediments and surface waves. A wave staff, pressure sensor, and accelerometer were used in East Bay, Louisiana, an area that has a fine‐grained clay bottom. The accelerometer contained three solid‐state accelerometers
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Surface properties of natural aquatic sediments

Water Research, 1997
Abstract Eleven geographically and hydrologically diverse sediment samples were collected from major rivers of China and determined for the surface properties. The results indicate the sediments have a large variation in surface area (6.9–16.0 m 2 /g of SSA N2 , 35.6–73.2 m 2 /g of SSA CPB ), surface site density (10.3–149.8 μmol/g) and surface ...
Feiyue Wang, Jingsheng Chen, Jianglin Chen, Willis Forsling   +3 more
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Permeability shapes bacterial communities in sublittoral surface sediments

Environmental Microbiology, 2017
Summary The first interaction of water column‐derived organic matter with benthic microbial communities takes place in surface sediments which are acting as biological filters catalyzing central steps of elemental cycling.
Probandt, D., Knittel, K., Tegetmeyer, Halina, Ahmerkamp, S., Holtappels, M., Amann, R.   +5 more
openaire   +3 more sources

Spatial Distributions of Biogeochemical Parameters in Surface Sediments

Water, Air, and Soil Pollution, 1997
The spatial variability of several sedimentological, chemical and biological parameters in the uppermost layer of bed sediment (ULBS) in Lake Kinneret, was studied during the development of anoxic conditions in the hypolimnion (May, 1995). ULBS samples were taken along a transect from the littoral to the pelagic zones, during tile crash of thePeridmium
I. Ostrovsky, D. Wynne, T. Bergstein-Ben Dan, A. Nishri, H. Li, Y. Z. Yacobi, N. Koren, R. Parparova   +7 more
openaire   +1 more source