Critical flow in rockbed streams with estimated values for Manning's n

Auteur(s) et Affiliation(s)



Description :
In this paper, n, Manning's roughness, is understood to include all forms of energy loss required to bring the Manning equation to an accurate estimate of mean velocity in the appropriate section. In subcritical flow it is probable that boundary roughness is the primary component in energy loss, but in high-gradient and rough boundary systems turbulent and vertical losses assume a much increased importance in contribution to the n term. Application of the equation of critical flow to data from well-known catastrophic flows provides surprisingly good estimates of Manning's n for these flows.


Type de document :
Article de périodique

Source :
Geomorphology (Amsterdam), issn : 0169-555X, 1997, vol. 20, n°. 1-2, p. 147-164, Collation : Illustration, Références bibliographiques : 32 ref.

Date :
1997

Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier