scholarly journals Salmon-driven bed load transport and bed morphology in mountain streams

2008 ◽  
Vol 35 (4) ◽  
Author(s):  
Marwan A. Hassan ◽  
Allen S. Gottesfeld ◽  
David R. Montgomery ◽  
Jon F. Tunnicliffe ◽  
Garry K. C. Clarke ◽  
...  
Keyword(s):  
Mountain Streams ◽  
Bed Load ◽  
Bed Morphology ◽  
Load Transport ◽  
Bed Load Transport

Coarse particle motion and resting times during bedload in a glacier-fed mountain stream of the central Chilean Andes

2020 ◽  
Author(s):  
Luca Mao ◽  
Ricardo Carrillo ◽  
Francesco Brardinoni ◽  
Matteo Toro ◽  
Luigi Fraccarollo
Keyword(s):  
Average Length ◽  
Mountain Streams ◽  
Mountain Stream ◽  
Bed Load ◽  
Pit Tags ◽  
Flow Energy ◽  
Load Transport ◽  
Bed Load Transport ◽  
Channel Slope ◽  
Chilean Andes

<p>Coarse bed load transport is a crucial process in river morphodynamics, but it is difficult to monitor in mountain streams. Predicting bed load is a difficult task especially in steep step-pool streams, where the critical dimensionless shear stress is affected by local channel slope and relative submergence, and only part of the flow energy is available to entrain and transport sediments as some is dissipated in local hydraulic plunging and jumps. Here we present a new sediment transport dataset obtained from two years of field-based monitoring (2014-2015) at the Estero Morales, a high-gradient stream in the central Chilean Andes. This stream features step-pool bed geometry and a glacier-fed hydrologic regime characterized by abrupt daily fluctuations in discharge. Bed load was monitored directly using Bunte samplers and by surveying the mobility of passive integrated transponder (PIT) tags. We used the competence method to quantify the effective slope, which is the fraction of the total slope responsible for bed load transport. This accounts for only 10% of the total slope, confirming that most of the energy is dissipated on macroroughness that characterize step-pool stream. We used the displacement lengths of PIT tags to derive the statistics of flight and resting times, observing that the average length of a flight scales inversely with grain size.</p>

Magnitude-frequency of bed load transport in mountain streams in Colorado

2004 ◽  
Vol 290 (1-2) ◽  
pp. 137-151 ◽  
Author(s):  
Margaret Torizzo ◽  
John Pitlick
Keyword(s):  
Mountain Streams ◽  
Bed Load ◽  
Load Transport ◽  
Bed Load Transport

NUMERICAL MODEL TO SIMULATE THE EROSION ON THE SLOPE DUE TO OVERTOPPING

2010 ◽  
Vol 13 (3) ◽  
pp. 78-87
Author(s):  
Hoai Cong Huynh
Keyword(s):  
Numerical Model ◽  
Flow Model ◽  
Bed Load ◽  
Experiment Data ◽  
Step Method ◽  
Morphological Model ◽  
Load Transport ◽  
Bed Load Transport ◽  
The Finite Difference Method ◽  
Good Agreement

The numerical model is developed consisting of a 1D flow model and the morphological model to simulate the erosion due to the water overtopping. The step method is applied to solve the water surface on the slope and the finite difference method of the modified Lax Scheme is applied for bed change equation. The Meyer-Peter and Muller formulae is used to determine the bed load transport rate. The model is calibrated and verified based on the data in experiment. It is found that the computed results and experiment data are good agreement.

scholarly journals Experimental Study on Bypassing Tunnel of Bed Load Transport in a Reservoir

1996 ◽  
Vol 40 ◽  
pp. 813-818
Author(s):  
Minoru HARADA ◽  
Kazuo ASHIDA ◽  
Takashi DENO ◽  
Yuji OHMOTO
Keyword(s):  
Experimental Study ◽  
Bed Load ◽  
Load Transport ◽  
Bed Load Transport

Measuring Bed Load Transport Rates by Grain-Size Fraction Using the Swiss Plate Geophone Signal at the Erlenbach

2016 ◽  
Vol 142 (5) ◽  
pp. 04016003 ◽  
Author(s):  
Carlos R. Wyss ◽  
Dieter Rickenmann ◽  
Bruno Fritschi ◽  
Jens M. Turowski ◽  
Volker Weitbrecht ◽  
...  
Keyword(s):  
Grain Size ◽  
Size Fraction ◽  
Bed Load ◽  
Load Transport ◽  
Bed Load Transport
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