Main channel Bottom width$=5\mathrm{.}0$m$,$ Side slope $1\mathrm{.}5$H: $1$V$,$ Bank full depth$-2\mathrm{.}0$m$,$ Manning's coefficient$-0\mathrm{.}025.$ Longitudinal

slope$=0\mathrm{.}001$

Floodplain: Width $25$m$,$ Side slope $2\mathrm{.}0$H: $1$V$,$ Bank full depth$-2\mathrm{.}0$m$,$ Manning's coefficient$=0\mathrm{.}06,$ Longitudinal slope$=0\mathrm{.}001$ Compute the uniform flow discharge for a flow with total depth of $2\mathrm{.}5$m by using DCM with Diagonal Interface procedure