A rectangular brick-lined channel (n = 0.016) of 4.0-m width is laid on a bottom slope of 0.0009. It carries a discharge of 15 m3 /s and the fl ow is non-uniform. If the depth at a Section A is 2.6 m, calculate the depth at section B, 500 m downstream of A, by using (a) only one step, and (b) two steps.
