Post Reply 
Open Channel Flow in a Parabolic Channel
04-03-2018, 02:38 AM (This post was last modified: 04-03-2018 02:45 AM by Gene222.)
Post: #1
Open Channel Flow in a Parabolic Channel
This program calculates the normal depth of a parabolic channel in the form of y = Cx^2, where C is the x^2 coefficient or curvature coefficient. The channel depth and width or any other known depth and width must be entered to describe the curvature of the parabola. Enter any three of the four variables (flow rate, depth, slope, and n) and solve for the fourth variable. The wetted perimeter P is calculated using the exact formula per Chow as redefined by Merkley. See the included attachment for the formulas and test problems used in writing the program.

Example. A grassy swale at a slope of 0.008 has water flowing at a rate of 85 cfs. The swale has a parabolic shape and is 2.5 ft deep by 25 ft wide. Assume n = 0.05. Solve for the depth of flow in the swale. Run the program. Select English Units. Enter the channel width (2.5 ft) and depth (25 ft). Enter the flow rate (85 cfs), slope (0.008), and n value (0.05). It does not matter is a value is shown in the depth box. Then select "Solve for depth Y". Press the "OK" tab in the lower right corner. The print terminal will show Depth Y = 1.9022 ft and Velocity V = 3.0735 ft and other information.


Attached File(s)
.zip  ParabolicChan.zip (Size: 382.46 KB / Downloads: 23)
Find all posts by this user
Quote this message in a reply
Post Reply 


Messages In This Thread
Open Channel Flow in a Parabolic Channel - Gene222 - 04-03-2018 02:38 AM



User(s) browsing this thread: 1 Guest(s)