A concrete pipe 750 mm in diameter is laid to a gradient of 1 in 200.The estimated value of Manning’s ?is 0.012m−1/3 s. Calculate the discharge when: (a)the pipe is full; (b)the depth is 90% of maximum. Explain why the answer in (b) exceeds th

A concrete pipe 750 mm in diameter is laid to a gradient of 1 in 200.The estimated value of Manning’s ?is 0.012m−1/3 s. Calculate the discharge when: (a)the pipe is full; (b)the depth is 90% of maximum. Explain why the answer in (b) exceeds th

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter8: Seepage

Section: Chapter Questions

Problem 8.12P

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Concept explainers

Principles of Seepage

In hydrology, when water flows down in a pore or crack of unsaturated soil due to gravity, the deep layer of soil is called seepage. It is the slow movement of water in the soil layer. Seepage is mainly found near hydraulic structures and is responsible for the stability of earthen-type hydraulic structures.

Question

A concrete pipe 750 mm in diameter is laid to a gradient of 1 in
200.The estimated value of Manning’s ?is 0.012m−1/3
s.
Calculate the discharge when:
(a)the pipe is full;
(b)the depth is 90% of maximum.
Explain why the answer in (b) exceeds th

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Step 2: a) Calculate the discharge when pipe is full

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Step 3: b) Calculate the discharge when depth is 90% of maximum

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