K Kouzouki Engineering calculators
Hydraulics

Open-channel & pressure-pipe flow

Everyday hydraulics in US customary units — Manning's equation for open channels, the Bernoulli energy equation between two points, pressure-pipe head loss (Darcy-Weisbach or Hazen-Williams with minor losses), and specific energy with critical & normal depth and the hydraulic jump. Every equation, substitution and variable definition is shown in full.

Open-Channel Flow

Manning's equation — rectangular, trapezoidal, triangular & circular channels; velocity, discharge, Froude.

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Bernoulli Energy

Energy equation between two points — solve pressure, velocity, elevation or head loss.

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Pipe Head Loss

Pressure-pipe head loss — Darcy-Weisbach (Swamee-Jain) or Hazen-Williams plus minor losses.

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Specific Energy

Specific energy, critical & normal depth, Froude number and the hydraulic-jump sequent depth.

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Basis. US customary units (ft, ft/s, cfs). Manning's n, pipe roughness ε / Hazen-Williams C, and the minor-loss ΣK are inputs from the channel/pipe design references (Chow's roughness tables, material data, fitting-loss tables). Open-channel results assume uniform (normal) flow. Each page carries an independent validation report.