“…Several studies that examined the effect of the mesh resolution in flood inundation modelling, and mapping support the fact that the use of smaller mesh elements reduces the terrain truncation errors and flow truncation errors (Begnudelli & Sanders, ; Begnudelli, Sanders, & Bradford, ; Horritt, Bates, & Mattinson, ; Schubert, Sanders, Smith, & Wright, ). Moreover, numerous studies that examined the effect of the DTM accuracy and resolution in flood inundation modelling and mapping support the fact that detailed and accurate representation of the river and riverine area has significant impact on the hydraulic‐hydrodynamic modelling results, not only concerning the flood extent but the water depth as well (Courty, Soriano‐Monzalvo, & Pedrozo‐Acuña, ; Lim & Brandt, ; Md Ali et al, ; Papaioannou, ; Papaioannou et al, ; Papaioannou, Loukas, & Georgiadis, ; Vozinaki, Morianou, Alexakis, & Tsanis, ). Nevertheless, a limited number of studies in fish habitat hydraulic modelling have examined the DTM and/or mesh resolution (Boavida et al, ; Crowder & Diplas, ; Grantham, ; Kolden, Fox, Bledsoe, & Kondratieff, ; Lin, Lin, & Wu, ).…”