Managing reservoir sedimentation by venting turbidity currents: A review

2016 ◽  
Vol 31 (3) ◽  
pp. 195-204 ◽  
Author(s):  
Sabine Chamoun ◽  
Giovanni De Cesare ◽  
Anton J. Schleiss
Keyword(s):  
Turbidity Currents ◽  
Reservoir Sedimentation

scholarly journals Numerical Modeling of turbidity currents with Ansys CFX and Telemac 3D

2018 ◽  
Vol 40 ◽  
pp. 03014 ◽  
Author(s):  
Magali Jodeau ◽  
Sabine Chamoun ◽  
Jiawei Feng ◽  
Giovanni De Cesare ◽  
Anton J. Schleiss
Keyword(s):  
Numerical Modeling ◽  
Experimental Work ◽  
Turbidity Current ◽  
Turbidity Currents ◽  
Reservoir Sedimentation ◽  
Engineering Teams ◽  
Fine Sediments ◽  
First Case ◽  
Ansys Cfx

Turbidity currents may be a relevant lever to manage the accumulation of fine sediments in reservoirs. In this paper, we propose to show how two different numerical codes simulate the propagation of turbidity currents. Telemac 3D and Ansys CFX 17.1 solver were chosen as they are commonly used by many research and engineering teams. The simulations are performed on two configurations. The first case aims at modeling the plunging of a turbidity current. The second model is validated based on an experimental work performed at EPFL. The latter consisted on testing turbidity current venting as a solution to manage reservoir sedimentation. A long and narrow flume was used to simulate the reservoir where a turbidity current was triggered. The advantages and limits of both approaches are discussed in order to supply guidelines for the modeling of turbidity currents in real reservoirs.

Impact of Turbidity Currents on Reservoir Sedimentation

2001 ◽  
Vol 127 (1) ◽  
pp. 6-16 ◽  
Author(s):  
Giovanni De Cesare ◽  
Anton Schleiss ◽  
Felix Hermann
Keyword(s):  
Turbidity Currents ◽  
Reservoir Sedimentation

scholarly journals Continuous Seasonal and Large-Scale Periglacial Reservoir Sedimentation

2018 ◽  
Vol 10 (9) ◽  
pp. 3265 ◽  
Author(s):  
Daniel Ehrbar ◽  
Lukas Schmocker ◽  
Michael Doering ◽  
Marco Cortesi ◽  
Gérald Bourban ◽  
...  
Keyword(s):  
Reservoir Operation ◽  
Large Scale ◽  
Numerical Models ◽  
Management Strategies ◽  
Field Measurements ◽  
Sediment Concentration ◽  
Turbidity Currents ◽  
Reservoir Sedimentation ◽  
Delta Formation ◽  
Sedimentation Processes

Sustainable reservoir use is globally threatened by sedimentation. It has been generally recognized that inadequate consideration of reservoir sedimentation has caused the worldwide decline of net storage. Numerical models are useful tools to simulate sedimentation processes and can be used to derive efficient counter-measures and sediment management strategies. They can be applied to both existing and potential future reservoirs to predict long-term sedimentation. In this study, an application of a simple, robust, and stable numerical 1D model to Gebidem reservoir in Switzerland accompanied by field measurements is presented. It focusses on seasonal and large-scale reservoir sedimentation processes that occur continuously throughout the whole deposition season, while episodic events like turbidity currents are not taken into account. The model simulates both the delta formation of coarse sediments and the lake-wide sedimentation from homopycnal flows. The model is used to assess the effects and significance of varying boundary conditions like inflow, suspended sediment concentration, particle size distribution (PSD), or reservoir operation. It will be demonstrated that future reservoir operation and PSD are as important as future runoff evolution. Based on these findings, implications on future reservoir operation, also considering climate change, are discussed. Finally, an outlook on pending research topics is given.

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