Reach scale variability of turbulent flow characteristics in a gravel-bed river

Geomorphology ◽  
2005 ◽  
Vol 68 (1-2) ◽  
pp. 95-113 ◽  
Author(s):  
Hélène Lamarre ◽  
André G. Roy
Keyword(s):  
Turbulent Flow ◽  
Flow Characteristics ◽  
Gravel Bed ◽  
Gravel Bed River

Size, shape and dynamics of large-scale turbulent flow structures in a gravel-bed river

2004 ◽  
Vol 500 ◽  
pp. 1-27 ◽  
Author(s):  
ANDRE G. ROY ◽  
THOMAS BUFFIN-BLANGER ◽  
HLNE LAMARRE ◽  
ALISTTAIR D. KIRKBRIDE
Keyword(s):  
Turbulent Flow ◽  
Large Scale ◽  
Flow Structures ◽  
Gravel Bed ◽  
Gravel Bed River

MONITORING UNSTEADY STREAMFLOW-STAGE HYSTERESIS BEHAVIOR OF A GRAVEL-BED RIVER

2018 ◽  
Vol 74 (4) ◽  
pp. I_313-I_318
Author(s):  
Mohamad Basel AL SAWAF ◽  
Kiyosi KAWANISI ◽  
Mochammad Meddy DANIAL
Keyword(s):  
Hysteresis Behavior ◽  
Gravel Bed ◽  
Gravel Bed River

scholarly journals Water-Worked Gravel Bed: State-of-the-Art Review

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 694 ◽  
Author(s):  
Ellora Padhi ◽  
Subhasish Dey ◽  
Venkappayya R. Desai ◽  
Nadia Penna ◽  
Roberto Gaudio
Keyword(s):  
State Of The Art ◽  
Flow Characteristics ◽  
Streamwise Velocity ◽  
Secondary Currents ◽  
Gravel Bed ◽  
Natural Stream ◽  
Art Research ◽  
The Comparative Study ◽  
Water Work

In a natural gravel-bed stream, the bed that has an organized roughness structure created by the streamflow is called the water-worked gravel bed (WGB). Such a bed is entirely different from that created in a laboratory by depositing and spreading gravels in the experimental flume, called the screeded gravel bed (SGB). In this paper, a review on the state-of-the-art research on WGBs is presented, highlighting the role of water-work in determining the bed topographical structures and the turbulence characteristics in the flow. In doing so, various methods used to analyze the bed topographical structures are described. Besides, the effects of the water-work on the turbulent flow characteristics, such as streamwise velocity, Reynolds and form-induced stresses, conditional turbulent events and secondary currents in WGBs are discussed. Further, the results form WGBs and SGBs are compared critically. The comparative study infers that a WGB exhibits a higher roughness than an SGB. Consequently, the former has a higher magnitude of turbulence parameters than the latter. Finally, as a future scope of research, laboratory experiments should be conducted in WGBs rather than in SGBs to have an appropriate representation of the flow field close to a natural stream.

Sign in / Sign up

Export Citation Format

Share Document