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Social ScienceWater 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?
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?
Expert Answer
Given information:
For the rectangular section b=15ft
Manning’s coefficient n= 0.015
Volume V = 18fps.
Slope S= 0.02
Calculation:
We have the manning’s formula
Image Transcriptionclose
1.486 AR And, we have the relation between the discharge, area and volume as Q AV V=Q A Write the Q value in the above equation then we get that 1.486 - AR S V = A 1.486 p% V = RH
Substitute the all values in the abo...
Image Transcriptionclose
1.486 18 0.015 b+2y by So 1.486 18 0.015 15+2y 15y (0.02) ...
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