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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 53 (1969)

Issue: 2. (February)

First Page: 465

Last Page: 465

Title: Computer Simulation of Nearshore Sediment Transport: ABSTRACT

Author(s): Graeme F. Bonham-Carter

Article Type: Meeting abstract

Abstract:

Can a heterogeneous mixture of sediment grains of various sizes and specific-gravity values be partitioned effectively into relatively homogeneous sedimentary groups by diffusion processes in nearshore areas? If so, where will concentrations of heavy minerals occur, and what will be the relation between mineral concentrations and subaqueous topography, assuming constant Previous HitwaveNext Hit conditions? A computer simulation model is used to explore these questions. Components of the model include: (1) a rectangular gridwork of cells, which is used to subdivide the region of interest, and provides the framework of an accounting system for keeping track of sediment movement, changes in bottom topography, Previous HitwaveNext Hit energy and orbital velocities; (2) a Previous HitwaveNext Hit-refraction algorithm, modified from Dob on which traces Previous HitwaveNext Hit rays (calculating Previous HitwaveNext Hit heights at intervals) from deep-water offshore into the shallow-water breaker zone; and (3) a sediment transport algorithm, which uses a two-dimensional diffusion Previous HitequationNext Hit with isotropic diffusion coefficients. Diffusion rates may be changed by altering the diffusion coefficients, which are here assumed to be a function of Previous HitwaveTop energy, grain size, and specific gravity.

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Copyright 1997 American Association of Petroleum Geologists