Question: Water flows in a channel whose bottom slope is 0.5 and whose cross section is as shown in Fig. P13132. The dimensions and the Manning

Water flows in a channel whose bottom slope is 0.5° and whose cross section is as shown in Fig. P13–132. The dimensions and the Manning coefficients for the surfaces of different subsections are also given on the figure. Determine the flow rate through the channel and the effective Manning coefficient for the channel.

FIGURE P13–132

1 m 1m 6 m Clean earth channel n = 0.022 10

1 m 1m 6 m Clean earth channel n = 0.022 10 m Heavy brush n = 0.075

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