A rectangular channel (n = 0.020) is to be 3.0 m wide. If a discharge of 3.00 m3/s is to be passed with the channel having an efficient section, what longitudinal slope is to be provided?
A rectangular channel (n = 0.020) is to be 3.0 m wide. If a discharge of...
Determine the discharge rate in a 10-inch wide concrete (n = 0.012) rectangular channel on a 1.1% longitudinal slope that has a normal depth of 5 inches.
A 10-m wide rectangular channel is carrying a discharge of 400 m3/s at a flow depth of 3.0 m. Determine the flow depth downstream of a step of 0.3 m if the step is: (i) a rise, and (ii) a drop. Does the water surface rise or drop downstream of the step in each case?
Water flows down a rectangular channel that has a width of 2.2 m, a Manning's n of 0.019 and a slope of 1 in 200. Calculate the discharge in the channel when the depth of flow is 0.5 m, 1.0 m, 2.0 m, and 4.0 m. Plot a graph of depth against discharge and comment on its shape, [10 marks] A wide channel has a Manning's number = 0.021, a longitudinal bed slope of 1:250 and conveys 0.XX m3/s/m of...
A rectangular channel having a width of 8m carries a discharge of 18 m3/s at the normal depth of 2.25m. (a) What should be the minimum width to which the channel can be contracted smoothly without causing any choking of flow assuming that the bed of the channel is level all through. (b) Compute the critical slope of this new section if n = 0.012. (c) How long should this channel be if there is a drop of 4m. at...
A 8 m wide rectangular channel is carrying water at 180 m3/s. The channel is constructed of concrete (Manning's N = 0.013) and is laid at a slope of 0.28 %. Find the normal depth
A sluice gate in a 3.0 m wide rectangular, horizontal, channel release a discharge of 18.0 cms. The gate opening is 0.67 m and the coefficient of contraction can be assumed to be 0.6. Examine the type of hydraulic jump formed when the tailwater is (1) 3.60 m (2) 5.00 m and (3) 4.09m.
Problem # 2 A discharge of 4800 m/s occurs in an approximately rectangular channel with a depth of 10 m and a width of 50 m. The channel slopes at a rate of 1/2000. The bed consists of fine sand (ds- 0.177 mm) and medium sand (ds-0.354 mm). Use the Shields diagram to determine whether these sizes will remain stationary or be transported. Assuming that the width and the slope do not change with the discharge, determine the discharge that...
A 2.44 wide channel with a bed slope of 0.0004 has a depth of flow of 0.61 m. (a) Determine the discharge of the channel. The manning coefficient is 0.015. (b) Determine the normal depth if the channel has a flow rate of 2.85 m3/s. (c) Determine the cross section of greatest hydraulic efficiency for a trapezoidal channel if the design discharge is 10 m3/s, the channel slope is 0.0052 and manning’s n = 0.025.
4. A reservoir spillway is a long wide concrete channel with a 3% slope and Manning's n is 0.020. The design discharge per unit width q-2.5 m/s a) Show that steady uniform flow is supercritical (7 points) b) A 1-meter diameter smooth cylinder is built in the spillway (to dissipate energy or support a structure above). What is the drag force on the smooth cylinder? Drag coefficient is on the next page. (6 points) D-Im c) If an obstruction downstream...
A canoer is aimlessly paddling in the 15 m wide rectangular channel downstream of a dam. The water depth and discharge in the channel are 5 m and 175 m3/s respectively. The dam operator assumes that the channel is clear, and ‘instantaneously’ ramps up the discharge to 210 m3/s, creating a surge that moves downstream. If the canoer is 350 m downstream of the surge at the instant that the surge is created and is able to paddle 1.5 m/s more than the speed of the water below him, will he make it to the dock that is 175 m downstream of him before being hit by the surge?