9. Open channel flow is: a) Liquid surface is subject to Hydraulic pressure b) Liquid surface is subject to atmospheric pressure 10. When depth of flow is more than critical depth, it is called as: a) Supercritical flow b) Subcritical flow 11. The depth corresponding to minimum specific energy: a) Subcritical depth b) Critical depth 12. Lacey's theory is applicable to: a) Rigid boundary channels carrying sediment-laden water b) Loose boundary channels carrying sediment-laden water c) Loose boundary channels carrying sediment free water

9. Open channel flow is: a) Liquid surface is subject to Hydraulic pressure b) Liquid surface is subject to atmospheric pressure 10. When depth of flow is more than critical depth, it is called as: a) Supercritical flow b) Subcritical flow 11. The depth corresponding to minimum specific energy: a) Subcritical depth b) Critical depth 12. Lacey's theory is applicable to: a) Rigid boundary channels carrying sediment-laden water b) Loose boundary channels carrying sediment-laden water c) Loose boundary channels carrying sediment free water

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter7: Seepage

Section: Chapter Questions

Problem 7.1P

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Part 1 Water flows in a 5-ft-wide rectangular channel with a flowrate of Q = 30 ft/s and an upstream depth of y1 = 2.5 ft as shown in the figure below. Determine (a) the flow depth and (b) the surface elevation at section (2). Assume h2 = 0.2 ft. h, (2) (1) Concepts Bernoulli's equation applies along a streamline to frictionless flow Volume flowrate is constant for steady, incompressible flow There are two possible depths when the flow area changes in an open channel The Froude number indicates whether the flow is subcritical, critical, or supercritical (a) What is the velocity at section 1? i ft/s (b) What is the total energy of the flow at section 1, with the elevation of the bottom of the channel at section 1 as reference? ft (c) What is the Froude number of the flow at section 1? i (d) Is the flow at section 1 subcritical, critical, or supercritical?
3(b). Water flows through a spillway and goes through a hydraulic jump shown in figure. Consider Flow rate Q=15m³/s per meter width of the channel and water depth Y₁ = 0.6m. Determine the downstream depth of the channel (Y2) after hydraulic jump occurs Energy Loss in the hydraulic jump Hydraulic Jump ↓ Y₁ = 0.6m L Y2 = ?
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