The influence of channel steps on coarse bed load transport in mountain torrents: case study using the radio tracer technique ‘PETSY’

2008 ◽  
pp. 129-139 ◽  
Author(s):  
Ralf Busskamp
Keyword(s):  
Bed Load ◽  
Tracer Technique ◽  
Load Transport ◽  
Bed Load Transport ◽  
Radio Tracer

scholarly journals Prediction of interaction between a side overflow and bed-load transport in a channel with semi-empirical approaches

2009 ◽  
Vol 36 (11) ◽  
pp. 1755-1763 ◽  
Author(s):  
Burkhard Rosier ◽  
Jean-Louis Boillat ◽  
Anton J. Schleiss
Keyword(s):  
Engineering Practice ◽  
Bed Load ◽  
Flume Experiments ◽  
Load Transport ◽  
Bed Load Transport ◽  
Input Variables ◽  
Side Weirs ◽  
Semi Empirical ◽  
Protection Engineering

Side weirs are free overflow regulation and diversion structures commonly encountered in flood protection engineering. The lateral loss of water reduces the bed-load transport capacity in the main channel, leading to local sediment deposition near the side overflow. As a consequence, the design overflow is increased in an uncontrolled way. Since this flow–sediment interaction in such a channel has not been studied so far, systematic flume experiments have been performed. Based on these experiments, a two-dimensional empirical model to describe the longitudinal evolution of the aggraded channel reach near the weir has been developed. In addition, a simple and straightforward approach for direct estimation of the side overflow in presence of bed-load transport has been established. To be generally applicable in engineering practice, all input variables are expressed in terms of dimensionless parameters. Finally, the application of the models is demonstrated in a case study on the Rhone River in Switzerland.

scholarly journals Bed-load transport modelling by coupling an empirical routing scheme and a hydrological-1-D-hydrodynamic model – case study application for a large alpine valley

2012 ◽  
Vol 32 ◽  
pp. 23-30 ◽  
Author(s):  
B. Gems ◽  
S. Achleitner ◽  
M. Plörer ◽  
F. Schöberl ◽  
M. Huttenlau ◽  
...  
Keyword(s):  
Transport Processes ◽  
Bed Load ◽  
Flood Events ◽  
Transport Modelling ◽  
Model Case ◽  
Alpine Valley ◽  
Routing Scheme ◽  
Load Transport ◽  
Bed Load Transport

Abstract. Sediment transport in mountain rivers and torrents is a substantial process within the assessment of flood related hazard potential and vulnerability in alpine catchments. Focusing on fluvial transport processes, river bed erosion and deposition considerably affects the extent of inundation. The present work deals with scenario-specific bed-load transport modelling in a large alpine valley in the Austrian Alps. A routing scheme founding on empirical equations for the calculation of transport capacities, incipient motion conditions and drag forces is set up and applied to the case study area for two historic flood events. The required hydraulic data result from a distributed hydrological-1-D-hydraulic model. Hydraulics and bed-load transport are simulated sequentially providing a technically well-founded and feasible methodology for the estimation of bed-load transport rates during flood events.

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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