Wind velocity and sand transport on a barchan dune

  title={Wind velocity and sand transport on a barchan dune},
  author={G. Sauermanna and Jos{\'e} S. Andrade and L. P. Maiac and U. M. S. Costab and A. D. Ara{\'u}jod and H. J. Herrmanna},
We present measurements of wind velocity and sand flux performed on the windward side of a large barchan dune in Jericoacoara, northeastern Brazil. From the measured profile, we calculate the air shear stress using an analytical approximation and treat the problem of flow separation by an heuristic model. We find that the results from this approach agree well with our field data. Moreover, using the calculated shear velocity, we predict the sand flux according to well-known equilibrium… CONTINUE READING