Free Online Manning Pipe Head Loss Calculator

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Manning Formula Head Loss at Given Full Flow

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Inputs

Protoka, q		X
Prečnik cevi, d₀		X
Pipe length, L		X
Manningov koeficijent hrapavosti, n ?		X
Total combined junction loss coefficient, k		X
Downstream EGL		X

Results

Area, A	Area, A		X
Okvašeni obim, O	Okvašeni obim, O		X
Hidraulički radijus, R	Hidraulički radijus, R		X
Tečenja, v	Tečenja, v		X
Energija tečenja, h_v	Energija tečenja, h_v		X
Friction slope	Friction slope		X
Napon smicanja average (vučna sila), tau	Napon smicanja average (vučna sila), tau		X
Friction loss, H_f	Friction loss, H_f		X
Junction loss, H_m	Junction loss, H_m		X
Total loss, H_l	Total loss, H_l		X
Upstream EGL	Upstream EGL		X
Upstream HGL in pipe (See notes)	Upstream HGL in pipe (See notes)		X

Notes:

For an open inlet (culvert) condition, it is necessary to check for inlet control conditions.: 1. The upstream HGL cannot be lower than the upstream normal depth flow elevation (or lower than the pipe!).; 2. The headwater of a culvert is better represented by the upstream EGL than the upstream HGL.; 3. See my 2-minute tutorial for simple standard culvert headwater calculations using HY-8.