A Computational Fluid Dynamics Simulation Model of Sediment Deposition in a Storage Reservoir Subject to Water Withdrawal

Siltation is one of the most common problems in storage projects and attached structures around the world, due to its effects on a project’s life span and operational efficiency. A three-dimensional computational fluid dynamics (CFD) model was applied to study the flow and sediment deposition in a m...

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Veröffentlicht in:Water (Basel) Jg. 12; H. 4; S. 959
Hauptverfasser: Mohammad, Mohammad E., Al-Ansari, Nadhir, Knutsson, Sven, Laue, Jan
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Basel MDPI AG 01.04.2020
Schlagworte:
3-D numerical model
Analysis
bias
Computer simulation
Computer-generated environments
Connectivity
Dams
Efficiency
Finite volume method
flow
Flow velocity
Fluid dynamics
Geoteknik
Germany
Hydroelectric power
Iraq
Laboratories
longevity
model validation
Mosul Dam
pollution load
Power plants
prediction
pumping station’s Intake
reservoir siltation
sediment deposition
Sediment transport
Sedimentation & deposition
sediments
Simulation
Simulation methods
simulation models
Soil erosion
Soil Mechanics
storage
Studies
t-test
water
Germany
Iraq
ISSN:2073-4441, 2073-4441
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Zusammenfassung:Siltation is one of the most common problems in storage projects and attached structures around the world, due to its effects on a project’s life span and operational efficiency. A three-dimensional computational fluid dynamics (CFD) model was applied to study the flow and sediment deposition in a multipurpose reservoir (Mosul Dam Reservoir, Iraq) subject to water withdrawal via a pumping station. A suitable control code was developed for the sediment simulation in intakes with multiblock option (SSIIM) model, in order to simulate a study case and achieve the study aims. The measured total deposited load in the reservoir after 25 years of operation and the measured sediment load concentration at different points near the pumping station intake were considered to validate the model results. The sediment load concentrations at several points near the water intake were compared; the percent bias (PBIAS) value was 3.6%, while the t-test value was 0.43, less than the tabulated value, indicating fair model performance. The model sensitivity to grid size and time steps was also tested. Four selected bed level sections along the reservoir were compared with the simulated values and indicate good performance of the model in predicting the sediment load deposition. The PBIAS ranged between 4.8% and 80.7%, and the paired t-test values indicate good model performance for most of the sections.
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ISSN:2073-4441
2073-4441
DOI:10.3390/w12040959