Water is flowing uniformly with flow rate 18.6 m3/s and water depth 1.2 min a rectangular open channel of width 8 m. A temporary short span bridgeis proposed to be constructed across the channel in which bridgeembankment is needed at both sides of the channel causing the channel tobe constricted under the proposed bridge. (ii) If the channel width under the proposed bridge is 4 m due to theunavoidable problem condition, calculate the expected flow depthunder the bridge, at just upstream and at just downstream of thebridge.(iii) If the water depth just upstream of the proposed bridge is limitedto be 0.2 m higher than the normal depth, calculate the channel widthunder the bridge.

Solution-The given values are as follows The Discharge Q= 18.6 m3/s The Water Depth Y1= 1.2 m The…

Water is flowing uniformly with flow rate 18.6 m3/s and water depth 1.2 m in a rectangular open channel of width 8 m. A temporary short span bridge is proposed to be constructed across the channel in which bridge embankment is needed at both sides of the channel causing the channel to be constricted under the proposed bridge.

Water is flowing uniformly with flow rate 18.6 m3/s and water depth 1.2 m in a rectangular open channel of width 8 m. A temporary short span bridge is proposed to be constructed across the channel in which bridge embankment is needed at both sides of the channel causing the channel to be constricted under the proposed bridge.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The velocity and depth of flow in a 3.0 m wide rectangular channel are 2.0 m/s and 2.5 m/s respectively. If the channel has it's width enlarged to 3.5 m at a section, the discharge past section is
A rectangular channel having a bed slope of 0.0001, width 3.0 m and Manning's coefficient 0.015, carries a discharge of 1.0 m³/s. Given that the normal depth of flow ranges between 0.76 m and 0.8 m. The minimum width of a throat (in m) that is possible at a given section, while ensuring that the prevailing normal depth is not exceeded along the reach upstream of the contraction, is approximately equal to (assume negligible losses)
A vertical sluice gate spans the full width of a rectangular channel 6.0 m wide. If the downstream depth is 1.2 m and the upstream depth is 6.0 m,what will be the flow if the upstream depth is 6m.
Gvf-
4. A vider is 30 m the of wide and has a rectangular shape. At a bridge location the flow width is restricted to 25m by the piers bridge and the river bed is approximately horizontal. Describe the obtains underneath the bridge with minimum upstream which flow "depth when a flood of 450 m³/s flows in the river
A trapezoidal channel is lined with rock riprap and has a bottom width of 20 ft, 1.5:1 side slope (horizontal to vertical), a bottom slope of 0.0010 ft/ft, and a Manning n of 0.030. At the end of the canal the flow is critical before it hits an overfall with a spillway structure. Determine the critical and normal depth and sketch the water surface profile. (use a discharge of 1500 cfs)
A triangular open channel carries 7.0 m3/s of water. If the side is sloping at 60o from the horizontal both sides, find the depth of flow if n = 0.012 and S = 0.0008. A) 1.62 m B) 2.61 m c) 3.12 m D) 2.12 m E) No Answer among the choices
Q7] A trapezoidal channel has a bed width of 3.0 m and a side slope of 1:1. When the discharge was 2.5 m³/s, the normal depth was observed to be 0.85 m. Estimate the discharge in the channel when the normal depth is 1.20 m.
An assembly made of a rigid arm ABC hinged at end A and supported by an elastic rope CD at end C is shown in the figure. The members may be assumed to be weightless and the lengths of the respective members are as shown in the figure. A Rigid arm `Rope C Under the action of a concentrated load P at C as shown, the magnitude of tension developed in the rope is B.
A 3 metre wide rectangular channel flowing at its normal depth of 0.8m carries a discharge of 9.5m³/s. The bed slope of the channel is (a) steep (b) critical (c) mild (d) adverse
(b) Water is flowing uniformly with flow rate 18.6 m3/s and water depth 1.2 m in a rectangular open channel of width 8 m. A temporary short span bridge is proposed to be constructed across the channel in which bridge embankment is needed at both sides of the channel causing the channel to be constricted under the proposed bridge. (i) Calculate the maximum channel width under the proposed bridge that will not cause backwater upstream.