“…Rare are the experiments that deal with solute transport in channels under well‐controlled conditions and unsteady state flow events. In the literature, some studies were carried on real‐scale channels (e.g., Errico et al, ; Newson, ; Rudi, Bailly, Belaud, & Vinatier, ) and on laboratory channels (Vinatier, Bailly, & Belaud, ) for various purposes according to project features: impact of land use change on floods (Jung, Kang, Hong, & Yeo, ), impact of dikes on inundation (Ettema & Muste, ), impact of vegetation on hydraulic resistance (Defina & Peruzzo, ; Errico et al, ), role of flow conditions in hydraulic properties (Rouzes, Moulin, Florens, & Eiff, ) and in biofilm colonization (Coundoul et al, ), and so on. The experiment size should verify hydraulic laws of similitude (Chanson, ).…”