Effects of relative submergence and bed slope on sediment incipient motion under decelerating flows

Title:

Effects of relative submergence and bed slope on sediment incipient motion under decelerating flows

Creator:

Bolhassani, Ramin, Afzalimehr, Hossein, and Dey, Subhasish

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:1588c477-3afd-4cf1-8714-8f1a22aba778
uuid:1588c477-3afd-4cf1-8714-8f1a22aba778
doi:10.1515/johh-2015-0039

Subject:

fluvial hydraulics, open channel flow, river beds, sediment transport, shear stress, and streamflow

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

This paper presents the results of an experimental study to quantify the effects of bed slope and relative submergence on incipient motion of sediment under decelerating flows. Experiments were conducted in an experimental tilting-flume of 8 m long 0.4 m wide and 0.6 m deep with glass-walls. Three uniform sediments with median grain sizes of 0.95, 1.8 and 3.8 mm and three bed slopes of 0.0075, 0.0125 and 0.015 were used under decelerating flow. The main conclusion is that the Shields diagram, which is commonly used to evaluate the critical shear stress, is not suitable to predict the critical shear stress under decelerating flows.

Language:

Slovak

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

295-302

Source:

Journal of hydrology and hydromechanics | 2015 Volume:63 | Number:4

Harvested from:

CDK

Metadata only:

false