“…Numerous studies are concerned with inner structure, morphology and hydrology of alluvial fans (e.g., Blissenbach, 1954;Rachocki, 1981;Harvey, 1988;Blair and McPherson, 1992;Calvache et al, 1997;Blair and McPherson, 1998). To date, the majority of investigations of alluvial fans were conducted in mountain and foremountain areas, where forms built of coarse-grained sediments, often derived partly from debris flows, were analyzed (Bull, 1977;Brazier, 1987;Chamyal et al, 1997;Gómez-Villar and Garcia-Ruiz, 1997;Sorriso-Valvo et al, 1998;Harvey et al, 1999a;Webb et al, 1999;Gómez-Villar and Garcia-Ruiz, 2000;Anderson et al, 2000;Zanchetta et al, 2004). It is assumed that particularly four factors control the evolution of alluvial fans: intrinsic controls (e.g., Patton and Schumm, 1975;Scott and Erskine, 1994), changes of base level (Miall, 1992;Harvey et al, 1999a), climatic variations (Wasson, 1977;Starkel, 1991;Chamyal et al, 1997;Harvey et al, 1999b;Larue, 2002), land use changes (Teisseyre, 1995;Coulthard, 2001;Coulthard et al, 2002;Larue, 2002;Klimek, 2003;Zygmunt, 2004;De Moor and Verstraeten, 2008), or the relative roles of climate or human activities (Ballantyne, 1991;Chiverrell et al, 2007Chiverrell et al, , 2008.…”