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

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Title:Effects of relative submergence and bed slope on sediment incipient motion under decelerating flows
Creators:
Bolhassani, Ramin; Department of Water Engineering, Isfahan University of Technology, Boulevard of University, Isfahan, Iran.
Afzalimehr, Hossein; hafzali4 at gmail dot com; Department of Water Engineering, Isfahan University of Technology, Boulevard of University, Isfahan, Iran.
Dey, Subhasish; Department of Civil Engineering, Indian Institute of Technology, Kharagpur 721302, West Bengal, India.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 63, 4, pp. 295-302
Uncontrolled Keywords:fluvial hydraulics, open channel flow, river beds, sediment transport, shear stress, streamflow

Abstract

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.

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Title:Effects of relative submergence and bed slope on sediment incipient motion under decelerating flows
Translated title:Effects of relative submergence and bed slope on sediment incipient motion under decelerating flows
Creators:
Bolhassani, Ramin; Department of Water Engineering, Isfahan University of Technology, Boulevard of University, Isfahan, Iran.
Afzalimehr, Hossein; hafzali4 at gmail dot com; Department of Water Engineering, Isfahan University of Technology, Boulevard of University, Isfahan, Iran.
Dey, Subhasish; Department of Civil Engineering, Indian Institute of Technology, Kharagpur 721302, West Bengal, India.
Uncontrolled Keywords:fluvial hydraulics, open channel flow, river beds, sediment transport, shear stress, streamflow
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:63
Number:4
Page Range:pp. 295-302
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:8493
Item Type:Article
Deposited On:10 Dec 2015 17:53
Last Modified:10 Dec 2015 16:53

Citation

Bolhassani, Ramin; Afzalimehr, Hossein; Dey, Subhasish (2015) Effects of relative submergence and bed slope on sediment incipient motion under decelerating flows. Journal of Hydrology and Hydromechanics, 63 (4). pp. 295-302. ISSN 0042-790X

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