Leah's Formula is a method used for determining the diameter of pumping riser pipes. The formula is as follows:
Diameter = 1.2 * (Flow rate / (MDD * Velocity))
In this formula:
- Flow rate is the desired flow rate for the pumping system.
- MDD is the Manning's design depth. It is a factor that considers the roughness of the pipe and the desired capacity of the pipe.
- Velocity is the desired velocity of the flow in the pipe.
To solve for the diameter, you'll need to know the values of the flow rate, MDD, and velocity. Once you have those values, you can plug them into the formula to calculate the diameter of the pumping riser pipes.