Erratum for “Friction Modeling of Flood Flow Simulations” by Vasilis Bellos, Ioannis Nalbantis, and George Tsakiris

The following corrections shall be noted to the Appendix. Specifically, the correct form of Eq. (20) is

Eq. (32) for hydraulically rough flow is

Consequently, Eq. (33) becomes

Apart from errors in equations, the order of the values for the variable $D/k_s$ indicated on Fig. 6 should be reversed. Moreover, the symbol “$R{e}_D$” used for the Reynolds number should be replaced with the symbol “${\mathrm{R}}_{\mathrm{D}}$.” Similarly, “$R{e}_h$” should be replaced by “${\mathrm{R}}_h$” in Fig. 7.

Finally, the values of parameters $A$, $B$, and $C$ for the “Silt” category at Table 1 are respectively equal to 1.962, 921.3, and 0.144, instead of 3.355, 58,328.9, and 0.169. The related Nash-Sutcliffe coefficient (NSE) is 0.99 instead of 0.54. The corresponding value for Manning coefficient is 0.0111 instead of 0.0061, with NSE equal to 0.82 instead of 0.45.