Flume experimental evaluation of the effect of rill flow path tortuosity on rill roughness based on the Manning–Strickler equation

Auteur(s) et Affiliation(s)

STROHMEIER, S.M.

Univ. of Natural Resources and Life Sciences, Dept. of Water, Atmosphere and Environment, Vienna, Autriche

NOUWAKPO, S.K.

Univ. of Nevada Reno, Natural resources and Environment Sciences, Reno, Etats-Unis

HUANG, C.-H.

USDA-ARS National Soil Erosion Research Lab., Purdue Univ., West Lafayette, Etats-Unis

KLIK, A.

Univ. of Natural Resources and Life Sciences, Dept. of Water, Atmosphere and Environment, Vienna, Autriche

Description :
The aim of this study is to evaluate the effect of rill morphology on roughness and hence to assess the Manning–Strickler roughness coefficient (kSt) by rill morphological data. A laboratory experiment was set up to analyse rill hydraulics and roughness of I.) Free Developed Rill (FDR) flows and II.) Straight Constrained Rill (SCR) flows in the flume. It is highlighted that rill roughness was highly variable and relates to rill morphology. The AA. conclude that flow path tortuosity can be used to assess local friction effects.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2014, n°. 118, p. 226-233, nombre de pages : 8, Références bibliographiques : 36 ref.

Date :
2014

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

Langue :
Anglais