Repeat Problem 10.36 if the surfaces are smooth concrete as indicated except for the dia...

Repeat Problem 10.36 if the surfaces are smooth concrete as indicated except for the diagonal surface, which is gravelly with n = 0.025.

The smooth concrete-lined channel shown in Fig. P10.36 is built on a slope of 2 m/km. Determine the flowrate if the depth is y = 1.5 m.