<abstract xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></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.

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

Department of Water Engineering, Isfahan University of Technology, Boulevard of University, Isfahan, Iran.

Department of Civil Engineering, Indian Institute of Technology, Kharagpur 721302, West Bengal, India.

Journal of Hydrology and Hydromechanics

This chapter is distributed under the terms of the Creative Commons Attribution 4.0 Public License.

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...

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

Published Online: Oct 20, 2015

Page range: 295 - 302

Received: Jan 29, 2015

Accepted: Jul 31, 2015

DOI: https://doi.org/10.1515/johh-2015-0039

Keywords
Fluvial hydraulics, Open channel flow, River beds, Sediment transport, Shear stress, Streamflow

© 2015 Ramin Bolhassani et al., published by De Gruyter Open

This chapter is distributed under the terms of the Creative Commons Attribution 4.0 Public License.

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

Published Online: Oct 20, 2015

Page range: 295 - 302

Received: Jan 29, 2015

Accepted: Jul 31, 2015

DOI: https://doi.org/10.1515/johh-2015-0039

KeywordsFluvial hydraulics, Open channel flow, River beds, Sediment transport, Shear stress, Streamflow

© 2015 Ramin Bolhassani et al., published by De Gruyter Open

This chapter is distributed under the terms of the Creative Commons Attribution 4.0 Public License.

Keywords
Fluvial hydraulics, Open channel flow, River beds, Sediment transport, Shear stress, Streamflow