Question

Asked Nov 2, 2019

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Water flows in a rectangular flume 15 ft wide made of brick with cement mortar (n = 0.015). Find the depth of the water under uniform flow at 18 fps with a slope of 0.02. What would be the resulting error in the estimated depth if the “wide-and-shallow” flow assumption were used?

Step 1

**Given information:**

For the rectangular section b=15ft

Manning’s coefficient n= 0.015

Volume V = 18fps.

Slope S= 0.02

Step 2

**Calculation:**

We have the manning’s formula

Step 3

Substitute the all values in the abo...

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