Tabulate station elevations for an equal-tangent parabolic curve and check table by second differences.

Question

Figure shows a tunnel section on the Colorado River Aqueduct. The area of the water cross section is 191 ft 2 , and the wetted perimeter is 39.1 ft. The flow is 1600 cfs. If n=0.013 for the concrete lining, find the slope.

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Question

Chapter 25, Problem 25.4P

To determine

Tabulate station elevations for an equal-tangent parabolic curve and check table by second differences.

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Figure shows a tunnel section on the Colorado River Aqueduct. The area of the water cross section is 191 ft 2 , and the wetted perimeter is 39.1 ft. The flow is 1600 cfs. If n=0.013 for the concrete lining, find the slope.

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