Hydraulic Calculator

Manning's Equation for Open Channel Flow:
Solved for Two Simultaneous Pipe Conditions,
on the Same Slope:
Insert Your Conditions:
n1 Manning's coefficient of the liner pipe  
n2 Manning's coefficient of the host pipe  
D1 Inside diameter of the liner pipe inches
D2 Inside diameter of the host pipe inches
Relative Flow: Q1/Q2 =
Flow Capacity Recovery*: =
* Flow capacity recovery over 100% is an increase in the flow capacity of the pipeline.