Sedimentation in a narrow reservoir under climate change and sediment bypass tunnel operation scenarios ...
Reservoir sedimentation is one of the main issues interfering with the sustainable operation of many hydropower reservoirs as it causes a reduction of storage capacity and may also affect dam safety. The rate of sedimentation is anticipated to change due to changes in flow following climate change....
| Main Authors: | , , , |
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| Format: | Text |
| Language: | English |
| Published: |
ETH Zurich
2024
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.3929/ethz-b-000676029 http://hdl.handle.net/20.500.11850/676029 |
| Summary: | Reservoir sedimentation is one of the main issues interfering with the sustainable operation of many hydropower reservoirs as it causes a reduction of storage capacity and may also affect dam safety. The rate of sedimentation is anticipated to change due to changes in flow following climate change. Although quantifying the variation of sedimentation is subject to high uncertainty, sediment yield is mainly expected to increase for Alpine catchments due to retreating glaciers and thawing permafrost. Sediment Bypass Tunnels (SBTs) are hydraulic structures to counteract sedimentation problems as they allow for bypassing incoming sediment (bedload and parts of the suspended load) around the dam into the tailwater reach. This study deals with the SBT in Solis reservoir (Switzerland) where an SBT has been operating for more than a decade to counteract sedimentation. The aim is to evaluate the performance of the Solis SBT under climate scenarios by conducting 1D numerical simulations. The HydroCH2018-Runoff ensemble ... : Proceedings of the 10th International Symposium on Hydraulic Structures (ISHS 2024) ... |
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