“…This has led to decreasing water resources at various spatial scales , changes in fluvial channel morphology Piégay, 2001, 2002;Keestra et al, 2005) and alluvial fan activity (Gómez-Villar and García-Ruiz, 2000); difficulties for reservoir management (López-Moreno et al, 2004) and a reduction in sediment transport and siltation of reservoirs López-Moreno et al, 2003;Beguería et al, 2006;Navas et al, 2009). …”