“…Abellán et al, 2009;Schürch et al, 2011;Haas et al, 2012;d'Oleire-Oltmanns et al, 2012;Ouédraogo et al, 2014;Peter et al, 2014;Prosdocimi et al, 2015), as for the measurement of fluvial erosion or gullying on slopes of the Mediterranean region (Haas et al, 2011;d'Oleire-Oltmanns et al, 2012;Peter et al, 2014;2014) or on mining sites (cf. Hancock et al, 2008Hancock et al, , 2015Chen et al, 2015;Francioni et al, 2015). Beside these works, Tarolli (2014) gives a very detailed review of the applicability of the methods for the understanding of earth surface processes.…”