“…Even such a thin layer can have a large impact on the hydrological response of a field or a watershed Mualem, 2002, 2006). According to some investigations, when the soil is layered and the upper layer is the less permeable, water infiltration should be more representative of the upper layer (Bagarello et al, 2023;da Silva Ribas et al, 2021;Lassabatere et al, 2010;Yilmaz et al, 2013). To our knowledge, however, there are not many experimental investigations on the actual correspondence between homogeneous and layered soils (Di Prima et al, 2018).…”