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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Numerical estimation of saltation gravel transported on irregular bed
Numerical estimation of saltation gravel transported on irregular bed
Author : RYOTA TSUBAKI(1), YOSHIHISA KAWAHARA(2) & KENTA AYAKA(3)
ABSTRACT
Abrasion due to saltation gravel transported by flood flow is a main factor of a detachment of algae attached to the
riverbed cobbles. The amount of algae to be detached is related to impingement condition which consists of probabilistic
distributions of location, momentum and angle of the saltation gravel that impinges on the riverbed cobbles. The
impingement condition, as a barometer of algae detachment efficiency, depends on flow situation, configuration of
riverbed cobbles and saltation gravel size. The purpose of this study is to provide the probabilistic distribution of
saltation gravel impingement on riverbed. A numerical model based on particle method is used to describe the trajectory
of saltation gravel transported on the irregular shaped channel bed. The model validation by comparing experimental
result is reported in this paper.
File Size : 571,401 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 13/08/2015
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