Parshall Flume Flow Calculator

Formula

The formula to calculate the flow rate (Q) is:

\[ Q = C \cdot W^n \cdot H^{1.55} \]

Where:

Flow Rate (Q): The volume of water passing through the flume per unit time, measured in cubic feet per second.
Coefficient (C): A dimensionless factor specific to the throat width range of the flume.
Throat Width (W): The narrowest part of the flume, measured in inches.
Head (H): The height of the water upstream of the constriction, measured in inches.
Exponent (n): A dimensionless factor specific to the throat width range of the flume.

Let's say the coefficient is 0.6, the throat width is 12 inches, the head is 6 inches, and the exponent is 1. Using the formula:

\[ Q = 0.6 \cdot 12^1 \cdot 6^{1.55} \]

We get:

\[ Q = 0.6 \cdot 12 \cdot 15.59 \]

So, the flow rate (\( Q \)) is approximately 112.25 cubic feet per second.