1. Department of Physical Geography University of Trier Germany
2. Soil Erosion and Degradation Research Group, Department of Geography University of Valencia Spain
3. Department of Geography University of Valencia Spain
4. Escuela Técnica Superior de Ingeniería Geodésica, Cartográfica y Topográfica Universitat Politècnica de València Spain
5. School of Engineering and Technology Central Queensland University Rockhampton Australia