Estimating the mean speed of laminar overland flow using dye injection-uncertainty on rough surfaces

Auteur :
DUNKERLEY, D.

Description :
A common method for estimating mean flow speeds in studies of surface runoff is to time the travel of a dye cloud across a measured flow path. Motion of the dye front reflects the surface flow speed, and a correction must be employed to derive a value for the profile mean speed, which is always lower. The laboratory experiments suggest that the use of dye timing as a method for estimating v be abandoned in favour of precision depth measurements and the use of the relation v = Q/wd, at least within the laminar flow range tested.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2001, vol. 26, n°. 4, p. 363-374, Collation : Illustration, Références bibliographiques : 24 ref.

Date :
2001

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