Example $\backslash$#$2$: Calculate the flow rate for the channel geometry shown in the figure with a bed slope of $\backslash (0\mathrm{.}001\backslash$mathrm$\{$ft$\}/\backslash$mathrm$\{$ft$\}\backslash )$ from both composite roughness coefficient method $($Lotter formula$)$ and segmented conveyance method $($or divided channel method$).$ The main channel is a clean, straight natural stream with no rifts or deep pools, and the floodplains are covered with scattered brush and heavy weeds.