Laboratory experiments on the influence of slope length on runoff, percolation and rill development

Auteurs :
BRYAN, R. B.
POESEN, J.

Description :
Experiments to test relationships between slope length, percolation, and runoff were carried out in a laboratory flume under simulated rainfall at intensities from 24.2-26 mm/h. A composite soil subject to sealing was mixed from a clay and a sand and tested on 2.39 m, 7.18 m, and 17 m slopes for a minimum of 200 min. Runoff discharge is not a simple function of rainfall excess and slope length but shows a complex pattern dominated by surface sealing, rill development and headcut incision. Headcut and rill incision shows a cyclic pattern intersped with broad areas of sheetwash and colluvial deposition where percolation rates are very low.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 1989, vol. 14, n°. 3, p. 211-231, Références bibliographiques : 47 réf.

Date :
1989

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