How do you calculate discharge?
Discharge = V x D x W If length is measured in feet and time in seconds, Discharge has units of feet3/sec or cubic feet per second (cfs). Depth times Width gives the cross-sectional area.
How do you calculate discharge of a river?
Measuring Discharge To calculate discharge, multiply the area of water in a channel cross section by the average velocity of water in that cross section. The simplest way to measure discharge is to divide the channel cross section into vertical rectangular subsections.
What instrument measures discharge?
Venturimeter is a discharge measurement instrument that uses a converging section of pipe to give an increase in the flow velocity and a corresponding pressure drop from which the flowrate can be deduced.
How is lab discharge calculated?
To measure the discharge, each group first measures the width of the stream using the tape measure. This width is used to calculate the positions of ten equally spaced measurement stations across the stream’s width. Once the positions of these stations are known, measurements of depth and velocity can begin.
What is float method?
A fairly simple method for measuring flow rate through an open channel is the Float method. Briefly put, this method involves measuring the surface velocity of the water with a floating object, and then multiplying this velocity by the width and average depth of the channel.
What does subsurface float mean?
water velocity
How do you calculate streamflow?
Multiply the average depth of the stream by the width of the stream to find the area in ft2. Divide the distance traveled by the average travel time to find the velocity of the stream in ft/sec. Multiply the velocity of the stream by a correction factor. This is the corrected velocity of the stream.
How do you calculate water flow?
To calculate the water flow (in m3) multiply the average water velocity (in m/s) by the average width (in m) and by the average depth (in m). Water flow = 0.425 m/s x 1 m x 0.6 m = 0.255 m3/s. Note: remember that 1 m3 = 1 000 l so multiply by this to convert water flow measurements to litres per second (l/s).
How much water can flow through a 1.5 inch pipe?
Metric PVC Pipe
| Assume Average Pressure. (20-100PSI) About 12f/s flow velocity | ||
|---|---|---|
| 3/4″ | .75-.85″ | 23 gpm |
| 1″ | 1.00-1.03″ | 37 gpm |
| 1.25″ | 1.25-1.36″ | 62 gpm |
| 1.5″ | 1.50-1.60″ | 81 gpm |
How do you calculate water flow in Litres per minute?
The easiest way to get a fairly accurate measure of your water flow rate is to time yourself filling up a bucket. So for example if you fill up a 10 litre bucket in 1.5 minutes, then your flow rate will be: 10/1.5 = 6.66 Litres per minute. Don’t get confused between flow rate and pressure.
How do you calculate water flow per hour?
If you can see the fluid flowing, you can measure its velocity, and that means all you need is the area through which the fluid is flowing to calculate the flow rate using the formula Q = A × v.
How do you calculate pressure from area and flow rate?
With a pressure drop, for instance, of 80,000 pascals, 0.0025 x 80,000 = 200. Multiply the constant pi by the answer to Step 1: 3.142 x 0.0025 = 0.00785. This answer is the pipe’s cross-sectional area. Multiply the area by the answer to Step 2: 0.00785 x 200 = 1.57.
Is flow rate the same as velocity?
Rate of flow, or simply flow, is the quantity of water, for example, that flows in a tube or other medium, in an interval of time. Examples: 2 kg of water per second, or 100 cubric meters of air per minute. Velocity is how fast the water, air or other fluid is moving in a tube or other medium.
What is one bar pressure in Litres per minute?
| bar/min/L/min flow rate conversion result | ||
|---|---|---|
| From | Symbol | Result |
| 1 | bar/min | 119.24 |
What is 1 bar in Litres per second?
| bar/sec/L/sec flow rate conversion result | ||
|---|---|---|
| From | Symbol | Result |
| 1 | bar/sec | 119.24 |