Preliminary study of the interference of surface objects and rainfall in overland flow resistance

Auteur(s) et Affiliation(s)



Description :
This study examines the validity of linear superposition approach when rainfall and surface roughness are considered in overland flow resistance. To examine a possible interference in flow resistance, a set of flume experiments using surface objects and rainfall as roughness elements were conducted. Since the flow resistance due to each element cannot be measured directly, the linear superposition equation had to be rewritten using friction factor increment as variable. The result shows that the interference between rainfall and surface roughness is significant and the composite resistance does not statistically equal to the sum of individual resistance. The linear superposition approach is hence invalid in the case of rainfall and surface elements in overland flow resistance.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2009, vol. 78, n°. 2, p. 154-158, nombre de pages : 5, Références bibliographiques : 24 ref.

Date :
2009

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