Author(s)

B.A. O'Connor

Abstract

Effect of turbulence on tidal suspended transport B.A. O'Connor Department of Civil Engineering, University of Liverpool, UK Abstract The effect of enhanced turbulence upon tidal suspended transport has been investigated using a combination of a one-dimensional (1DV) computer model and a turbulence-modified bulk transport model. An existing 1DV model, O'Connor and Nicholson [2], has been modified by including a random distribution of horizontal flow velocities into the model, which are also allowed to change mixing coefficients and their distribution. Operation of the model at turbulent space and time steps for a typical field situation with a fine sand bed shows that transport rates for normal turbulence are enhanced by some 4-25% at all times during the tidal cycle compared to calculations performed neglecting turbulence effects. A doubling of turbulence levels was found to increase transports by some 19-72% although a very large increase, albeit small in

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