scholarly journals Bed load transport and boundary roughness changes as competing causes of hysteresis in the relationship between river discharge and seismic amplitude recorded near a steep mountain stream

2017 ◽  
Vol 122 (5) ◽  
pp. 1182-1200 ◽  
Author(s):  
Danica L. Roth ◽  
Noah J. Finnegan ◽  
Emily E. Brodsky ◽  
Dieter Rickenmann ◽  
Jens M. Turowski ◽  
...  
Keyword(s):  
River Discharge ◽  
Mountain Stream ◽  
Bed Load ◽  
Seismic Amplitude ◽  
Load Transport ◽  
Bed Load Transport ◽  
Competing Causes ◽  
The Relationship ◽  
Boundary Roughness

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>

scholarly journals Controls Over Particle Motion and Resting Times of Coarse Bed Load Transport in a Glacier‐Fed Mountain Stream

2020 ◽  
Vol 125 (4) ◽  
Author(s):  
Luca Mao ◽  
Matteo Toro ◽  
Ricardo Carrillo ◽  
Francesco Brardinoni ◽  
Luigi Fraccarollo
Keyword(s):  
Particle Motion ◽  
Mountain Stream ◽  
Bed Load ◽  
Load Transport ◽  
Bed Load Transport

Bed load transport under different streambed conditions – a field experimental study in a mountain stream

2012 ◽  
Vol 27 (4) ◽  
pp. 426-438 ◽  
Author(s):  
Guo-an YU ◽  
Zhao-yin WANG ◽  
He Qing HUANG ◽  
Huai-xiang LIU ◽  
Brendon BLUE ◽  
...  
Keyword(s):  
Experimental Study ◽  
Mountain Stream ◽  
Bed Load ◽  
Load Transport ◽  
Bed Load Transport

Bed load transport in a steep snowmelt-dominated mountain stream as inferred from impact sensors

2008 ◽  
Vol 62 (2) ◽  
pp. 66-74 ◽  
Author(s):  
Geir Vatne ◽  
Øyvind Takøy Naas ◽  
Tommy Skårholen ◽  
Achim A. Beylich ◽  
Ivar Berthling
Keyword(s):  
Mountain Stream ◽  
Bed Load ◽  
Load Transport ◽  
Bed Load Transport

scholarly journals The macroinvertebrate fauna of the Młynne stream (Polish Carpathians) in the aspect of the bed load transport and water quality

2015 ◽  
Vol 47 (4) ◽  
pp. 321-332
Author(s):  
Paweł Oglęcki ◽  
Artur Radecki-Pawlik
Keyword(s):  
Water Quality ◽  
Biological Diversity ◽  
Mountain Stream ◽  
Bed Load ◽  
River Bed ◽  
Load Transport ◽  
Polish Carpathians ◽  
Bed Load Transport ◽  
River Valleys ◽  
Macroinvertebrate Fauna

Abstract The macroinvertebrate fauna of the Młynne stream (Polish Carpathians) in the aspect of the bed load transport and water quality. The qualitative composition of the bottom sediments and the bed load and suspended load transport along the mountain stream were presented. The studies were carried on the Młynne stream in Gorce (Polish Carpathians). The streams flows partially in the natural river-bed and partially in the regulated with rapids. The stream bed load is accumulated in the reservoir up to the check dam and is qualitatively different from the load deposited at the bars. The taxonomic richness of the Młynne stream is a little bigger compared with the other investigated mountain and sub-mountain streams, but lesser compared with bigger rivers. The number of taxa on the natural reaches is more than double than on the regulated ones, with more taxa of high environmental demands and high values of the BMWP-PL index. The paper brings up the question of the environmental friendly technical solutions in different human activities in the sub-mountain and mountain river valleys, advantageous for humans and the river biological diversity (or resistance for negative environmental factors) as well.

scholarly journals Bed load transport in a very steep mountain stream (Riedbach, Switzerland): Measurement and prediction

2016 ◽  
Vol 52 (12) ◽  
pp. 9522-9541 ◽  
Author(s):  
Johannes M. Schneider ◽  
Dieter Rickenmann ◽  
Jens M. Turowski ◽  
Bastian Schmid ◽  
James W. Kirchner
Keyword(s):  
Mountain Stream ◽  
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.

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