Accession Number : AD0772106

Title :   Sediment Transport in Random Waves.

Descriptive Note : Technical rept.,


Personal Author(s) : Liang,S. S. ; Wang,Hsiang

Report Date : DEC 1973

Pagination or Media Count : 120

Abstract : The mechanics of sediment transport under wave action are systematically investigated. Results are then extended to a random wave field. The results apply only to regions well beyond the surf zone where the flow field, though irregular in appearance, is still amenable to mathematical expressions in gross terms. The flow field is artificially divided into two zones: the bed layer, and the internal flow region where viscosity can be neglected. The analysis is then naturally broken down into several stages: (1) The simulation of random sea condition in time and space frames with given wave spectrum; (2) The sediment concentration and transport in the bed layer under random wave; (3) The suspended load concentration and transport in the internal flow region. The total sediment transport is calculated through matching boundary conditions of the two zones and by adding the bed-load and suspended-load movements. Computer programs are developed to facilitate calculations with overwater wind speed and sediment grain size as the major inputs. (Modified author abstract)

Descriptors :   *Ocean waves, *Sediment transport, Flow fields, Particle size, Simulation, Loads(Forces), Boundary layer, Diffusion, Fluid flow, Mathematical models, Wind velocity, Computer programs, Surface waves, Concentration(Composition)

Subject Categories : Physical and Dynamic Oceanography
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE