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Effect of sedimentation on 3D turbidity currents
2009In this paper a mathematical model for 3D turbidity currents has been presented. The model consists in a system of partial differential equations in conservative form, formulated in the framework of the shallow water equations and it accounts for the main features of the turbidity currents: entrainment of environment fluid, settling and resuspension of
La Rocca M. +3 more
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EAGE Research Workshop - From Seismic Interpretation to Stratigraphic and Basin Modelling, Present and Future, 2006
Algorithms for modelling of turbidity currents in three dimensions, to assist in the exploration of poorly imaged deposits, are described and examples given of their use. Key aspects of algorithm design are:- 1. Algorithm efficiency. Program must be capable of accurately modelling currents and their deposits with good resolution and on small computers.
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Algorithms for modelling of turbidity currents in three dimensions, to assist in the exploration of poorly imaged deposits, are described and examples given of their use. Key aspects of algorithm design are:- 1. Algorithm efficiency. Program must be capable of accurately modelling currents and their deposits with good resolution and on small computers.
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Contour Currents and Turbidity Currents: ABSTRACT
AAPG Bulletin, 1968Turbidity currents transport sediments downslope and account for many graded sequences included in displaced clastic sediment embedded in deep-water deposits. Contour currents flow parallel with the isobaths and transport fine sediments for thousands of miles along the continental margins.
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Oblique reflection of turbidity currents
Geology, 1991Turbidity currents meeting obstacles, for example, the margins of a confined basin, are subject to reflection. The consequent change in flow direction is expressed in the sequence of depositional structures of the resulting bed of sediment. Putative examples of orthogonal reflection have been described, based on 180° opposed current directions.
Ben Kneller +3 more
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Self-accelerating turbidity currents
Journal of Fluid Mechanics, 1986Approximate layer-averaged equations describing the mechanics of turbid underflows are derived. Closure of the equations describing the balance of fluid mass, sediment mass, and mean flow momentum provides for the delineation of a three-equation model.
Parker, Gary +2 more
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Turbidity Current with Erosion and Deposition
Journal of Hydraulic Engineering, 1985The equations which govern the movement of two‐dimensional gradually varied turbidity currents in reservoirs and over beaches are derived and solved numerically. Turbidity currents are sediment‐laden gravity currents that exchange sediment with the bed by erosion or deposition as the flow travels over the downslope.
J. Akiyama, H. Stefan
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Turbidity-Current Experiments: ABSTRACT
AAPG Bulletin, 1966Experiments were performed in the W. M. Keck Laboratory, California Institute of Technology, using a lucite channel 5 meters long, 50 cm. deep, and 15.4 cm. wide. Turbidity-current "surges" were produced by releasing suspensions of plastic beads from a lock at one end of the channel.
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The Competence of Turbidity Current Flow
Geological Society of America Bulletin, 1970The competence of turbidity currents, that is, their ability to transport coarse material, is examined. The stress required to transport grains of diameter D (where D is greater than 7 mm) is evaluated with where (ρ s − ρ t ) is the density difference between the grains and the turbidity current. The bottom stress exerted by a flow of thickness
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A hydrodynamic theory of turbidity currents
Journal of Geophysical Research, 1960A theory of steady-state turbidity currents along sloping and horizontal ocean or lake bottoms is developed on the basis of hydrodynamic boundary-layer assumptions. The theory is applied to the Grand Banks turbidity current of 1929; reasonable values of current thickness and sediment content are obtained, as well as satisfactory agreement between ...
John E. Plapp, James P. Mitchell
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Hydraulic Jumps in Turbidity Currents
Geological Society of America Bulletin, 1971If uniform flow conditions are approached, turbidity currents should be supercritical (Froude number greater than unity) while passing through submarine canyons, and subcritical (Froude number less than unity) in the upper submarine fan channel. The change in flow regime requires that the current pass through a hydraulic jump in the vicinity of the ...
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