Manning formula

proper noun

An empirical formula estimating the average velocity of a liquid flowing in a conduit that does not completely enclose the liquid, i.e. an open channel.

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Meanings

proper nounthe Manning formula
  1. An empirical formula estimating the average velocity of a liquid flowing in a conduit that does not completely enclose the liquid, i.e. an open channel.

Synonyms & antonyms

Also see
manning's equation

Origin

Named after the Irish engineer Robert Manning, who in 1890 redeveloped the original formulation by the French engineer Philippe Gauckler in 1867.

Full word history & related roots →
Cite this entry
APA

Manning formula. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Manning%20formula

MLA

“Manning formula.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Manning%20formula. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Manning formula,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Manning%20formula.

Source: Manning formula on Wiktionary, CC BY-SA 4.0.