(Solved):
A constant stream of water of \( Q=2.0 \mathrm{~m}^{3} / \mathrm{s} \) flows along a long trapezoi ...
A constant stream of water of \( Q=2.0 \mathrm{~m}^{3} / \mathrm{s} \) flows along a long trapezoidal channel with a base width \( W=1.3 \mathrm{~m} \) and side slopes with angle \( \theta=52 \) (see the sketch below). If the slope of the channel is \( S=0.0015 \) and the flow depth \( d= \) \( 0.9 \mathrm{~m} \) is uniform, what is the value of Manning's \( n \) ?