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dc.contributor.authorFischenich, J. Craig, 1962-en_US
dc.creatorEnvironmental Laboratory (U.S.)en_US
dc.creatorEcosystem Management and Restoration Research Program (U.S.)en_US
dc.identifier.govdocERDC/TN EMRRP-SR-10en_US
dc.descriptionTechnical Noteen_US
dc.description.abstractRobert Manning (1816-1897) wrote his first paper on hydraulics in 1851 and his last in 1895. During this period, Manning devoted considerable effort to the development of a simple, dimensionally homogeneous formula for open-channel flow. In the end, his paper "On the Flow of Water in Open Channels and Pipes," published in Transactions of the Institution of Civil Engineers of Ireland (Manning 1891), became the primary reference for his work and the source of Manning's monomial equation: V = n k n R 3 2 S 2 1 (1) where V is the cross-sectional average velocity, R is the hydraulic radius, S is the energy slope, kn=1.486 for English units and kn=1 for SI units, and n is the Manning resistance coefficient. (The original equation was presented with kn/n represented as C, rather than the current convention presented here). Understanding the applicability and limitations of any analytical tool requires an understanding of the context in which it was developed and the use for which it was intended. This is the story of the Manning equation.en_US
dc.description.sponsorshipEcosystem Management and Restoration Research Program (U.S.)en_US
dc.format.extent4 pages/372 KBsen_US
dc.publisherEngineer Research and Development Center (U.S.)en_US
dc.relation.ispartofseriesTechnical Note (Ecosystem Management and Restoration Research Program (U.S.)) ; no. ERDC/TN EMRRP-SR-10en_US
dc.rightsApproved for public release; distribution is unlimiteden_US
dc.sourceThis Digital Resources was created in Microsoft Word and Adobe Acrobaten_US
dc.subjectHistory--Mathematical modelsen_US
dc.titleRobert Manning (a historical perspective)en_US
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