1. Irstea, UR ETGR, F-38402 Saint Martin d’Hères, France
2. Université Grenoble Alpes, F-38400 Grenoble, France
3. School of Civil Engineering, The University of Sydney, Sydney NSW 2006, Australia
4. Department of Civil Environmental and Geomatic Engineering, Faculty of Engineering Science, University College London, Gower Street, London WC1E 6BT, United Kingdom