Effects of rock fragment size and cover on overland flow hydraulics, local turbulence and sediment yield on an erodible soil surface

Auteurs :
BUNTE, K.
POESEN, J.

Description :
The interactions between overland flow hydraulics and sediment yield were studied in flume experiments on erodible soil surfaces covered by rock fragments. The high erodibility of a non-cohesive fine sediment permitted the effects of local turbulence and scour on sediment yield to be examined. Overland flow hydraulics and sediment yield were compared for experiments with pebble and cobble rock fragment covers. An adjustment of existing scour formulas that predict scour around bridge piers is suggested. Sediment yield from non-cohesive soils might then be estimated by a combination of sediment transport and scour formulas.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 1994, vol. 19, n°. 2, p. 115-135, Collation : Illustration, Références bibliographiques : 34 ref.

Date :
1994

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley