Abstract
Transverse duties appear in regions of mainly unidirectional wind and
high sand availability. A dune model is extended to two-dimensional
calculation of the shear stress. It is applied to simulate dynamics and
morphology of three-dimensional transverse dunes. In the simulations
they seem to reach translational invariance and do not stop growing.
Hence, simulations of two-dimensional dune fields have been performed.
Characteristic laws were found for the time evolution of transverse
dunes. Bagnold's law of the dune velocity is modified and reproduced.
The interaction between transverse dunes led to the interesting
conclusion that small duties can travel over bigger ones. Copyright (C)
2004 John Wiley Sons, Ltd.
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