$14\mathrm{.}19$ The channel shown in Fig. P$14\mathrm{.}19$ has a surface of float$-$finished concrete and is

laid on a slope that falls $0\mathrm{.}1m$ per $100m$ of length. Calculate the normal discharge and the

Froude number for a depth of $1\mathrm{.}5m.$ For that discharge, calculate the critical depth.

Figure P$14\mathrm{.}19$