Modelling a Dune Field
  We present a model to describe the collective motion of barchan dunes in a field. Our model is able to reproduce the observation that a typical dune stays confined within a stripe. We also obtain some of the pattern structures which ressemble those observed from aerial photos which we do analyse and compare with the specific field of La\^ayounne. 
A. R. Lima, G. Sauermann, H. J. Herrmann and K. Kroy