An empirical investigation of gully widening rates in upland concentrated flows

Auteur(s) et Affiliation(s)

WELLS, R.R.

USDA-ARS National Sedimentation Lab., MS, Oxford, Etats-Unis

MOMM, H.G.

Middle Tennessee State Univ., Dept. Geosciences, Murfreesboro, Etats-Unis

RIGBY, J.R.

USDA-ARS National Sedimentation Lab., MS, Oxford, Etats-Unis

BENNETT, S.J.

Dep. of Geography, Univ., Buffalo, Etats-Unis

BINGNER, R.L.

USDA-ARS National Sedimentation Lab., MS, Oxford, Etats-Unis

DABNEY, S.M.

USDA-ARS National Sedimentation Lab., MS, Oxford, Etats-Unis

Description :
Experiments were conducted to examine gully expansion (widening) as a function of channel slope and overland flow discharge. Packed soil beds were subjected to simulated rainstorms followed by clear-water overland flow. As bed slope and discharge increased, channel widening increased. An empirical equation, based upon measured channel width from constant discharge experiments, was developed in terms of slope and discharge. By further quantifying key aspects of gully erosion processes, results from this experimental campaign will significantly improve soil erosion prediction technology for use in agricultural regions.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2013, vol. 101, p. 114-121, nombre de pages : 8, Références bibliographiques : 30 ref.

Date :
2013

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais