Flow resistance and sediment transport by concentrated overland flow in a grassland valley

Special issue. Biogeomorphology, terrestrial and freshwater systems

Auteurs :
PROSSER, I.P.
DIETRICH, W.E.
STEVENSON, J.
HUPP, C.R.

Description :
The AA. conducted flume experiments in a grassed valley of coastal California to investigate flow resistance and sediment yield under natural conditions and with progressive clipping of grass cover. Flow resistance has a laminar-like relationship with Reynolds number but they attribute this to very low velocity beneath submerged stems, and not to the state of flow. The sediment transport relations provide support for the concept of a threshold shear stress which erosion is effectively prevented by surface resistance.


Type de document :
Congrès

Source :
Proceedings. Symposium de géomorphologie, 26, Binghampton, Etats-Unis, 1995-10-06, Geomorphology (Amsterdam), issn : 0169-555X, 1995, vol. 13, n°. 1-4, p. 71-86, Collation : Illustration, Références bibliographiques : 62 ref.

Date :
1995

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