“…Several techniques have been developed over the last decades to map flooded areas based on remotely sensed products (Teng et al, 2017). Some of these techniques are simple and only require the use of a digital elevation model (DEM) and an observed flood stage (Mengue et al, 2016(Mengue et al, , 2017Goerl, et al, 2017;Speckhann, et al, 2018;Dantas & Canil, 2017;Milanesi et al, 2017), as is the case of the HAND (Height Above the Nearest Drainage) terrain descriptor, described by Rennó et al (2008). This methodology has some limitations, such as the cross-sectional geometry and water level are averaged and considered uniform for each river reach.…”