Numerical modelling of reservoir flushing: a review

Petkovsek, G. and Kitamura, Y. (2022) Numerical modelling of reservoir flushing: a review. In: 14th International Conference on Hydroscience and Engineering, 26-27 May 2022, Izmir, Turkey.

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Reservoir storage loss due to sedimentation is a major issue affecting sustainable use of water resources. Sediment deposits can be removed by hydraulic flushing. During the flushing operation, bottom outlets are open and water and sediment released. The efficiency of the operation is improved if the reservoir water level is drawn down and free flow reestablished throughout the reservoir. Successfulness of flushing depends on a number of factors, such as bottom outlets capacity, reservoir shape and water availability. Modelling can be used to assess whether flushing is a viable solution for the management of sediment in the reservoir, as well as to design the flushing operations and optimize its scheduling. This paper reviews and analyses various modelling approaches described in the relevant literature. One, two and three dimensional numerical models have been used, as well as particle methods, such as smoothed particle hydrodynamics (SPH), more recently. One-dimensional models are useful for long term simulations, assessments on of a large number of scenarios, and optimization studies. Two- and three-dimensional models can be used to understand local scouring near the gates and other details of operation, as well as to study reservoirs of more complex shapes. Particle methods are particularly suitable for applications where the area occupied by water and sediment changes rapidly, as is the case with flushing, however they are also computationally more demanding, which limits their application to study of details.

Item Type: Conference or Workshop Item (Paper)
Subjects: Floods > Dams and reservoirs
Divisions: Floods
Depositing User: Helen Stevenson
Date Deposited: 22 Dec 2022 09:19
Last Modified: 22 Dec 2022 09:19

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