Concrete (lined) pipe ā Darcy-Weisbach headloss
This page covers headloss calculation for Concrete (lined) pipe using the Darcy-Weisbach equation ā the canonical pairing for Large-diameter raw water, irrigation canals.
Pipe parameters ā Concrete (lined)
- Hazen-Williams C-factor (new)
- 130
- Hazen-Williams C-factor (aged)
- 120
- Absolute roughness (Īµ)
- 0.001 ft
- Typical uses
- Large-diameter raw water, irrigation canals
Darcy-Weisbach method
Universal ā works for any fluid + any flow regime (laminar, transitional, turbulent).
Formula
h_f = f Ā· (L/D) Ā· (VĀ² / 2g)Limitations
Requires the friction factor f, which depends on Reynolds number and relative roughness ā typically evaluated via the Colebrook equation or Moody chart.