Calculate Cfs Water Flow

The equation used to determine the flow rate of a rectangular contracted weir is.

Calculate cfs water flow. In general river discharge is computed by multiplying the area of water in a channel cross section by the average velocity of the water in that cross section. P 2πr 2π 0 25 1 57 ft. For this activity a simpler method will be used. Q flow cfs cubic feet per second l perimeter of grate where flow is present in feet h depth of water in feet coefficient 3 33.

Please enter input data and press calculate. To calculate flow in cubic feet per second use a velocity of 5 ft sec and the q av formula. Your request was processed at 06 58 24 pm on september 5th 2020 200905 18 58 24. The basic equation for calculating flow is.

Bottom width of the weir in feet. Discharge is the volume of water moving down a stream or river per unit of time commonly expressed in cubic feet per second or gallons per day. Flow rate in cfs. Discharge area x velocity.

To calculate the area of a complex shape like a creek bed cross section with the best accuracy scientists use calculus. A πr π 0 25 0 1963 ft. Q flow cfs cubic feet per second a open area in grate inches 2 d depth of water over grate inches coefficient 0 0108. Divide the area by the.

Length pressure and bore diameter. V 0 408 q d2. Enter 20 in the in the velocity box and choose inches per second from its menu. The following formula is used by this calculator to populate the value for the flow rate pipe diameter or water velocity whichever is unknown.

R d 2 0 5 2 0 25 ft. Divide the diameter by 2 to find the radius of the pipe. Flow rate cfs area sq ft velocity ft sec 0 545 sq ft 5 ft sec 2 725 cfs. Height of the upstream water above the weir crest in feet.

Click the calculate button and the answer is 5 236 cubic feet per second and the answer is in 23 other different units. Copely tools flow rate calculator with this tool it is possible to easily calculate the average volumetric flow rate of fluids by changing each of the three variables. Velocity of water flow in a pipe. This calculator may also be used to determine the appropriate pipe diameter required to achieve a desired velocity and flow rate.

Determine the perimeter of the pipe. First click on what you are solving for flow rate enter 2 in the pipe diameter box and choose feet from its menu. Calculate the area ft 2 of the creek bed cross section. Q 3 33 l h 3 2.