1. CESBIO, Université de Toulouse, CNES, CNRS, IRD, UPS; Toulouse France
2. Faculté des Sciences et Techniques, University of Cadi Ayyad; Marrakech Morocco
3. EMMAH, INRA, Université d'Avignon et des Pays de Vaucluse, 84000; Avignon France
4. Department of Earth and Environmental Engineering, Columbia University; New York City New York USA
5. School of Earth and Environment, University of Western Australia; Perth Australia