411 REFERENCE · Wiktionary
Manning formula
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Named after the Irish engineer Robert Manning, who in 1890 redeveloped the original formulation by the French engineer Philippe Gauckler in 1867.
Proper noun
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.
en eponyms