Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Sustainable Sediment Management in Peaking Hydropower: A Case Study of the Kimathanka Arun Hydroelectric Project in Nepal
Sediment deposition poses a serious threat to the functioning of hydropower reservoirs worldwide. It not only affects the life of the reservoir and project functions, but also reduces the long-term benefits obtained from the project. The Kimathanka Arun Hydroelectric Project (KAHEP, 454 MW) is designed as a PRoR project located in Eastern Nepal. This project is located in the high sediment inflowing Himalayan Region (about 16.1 MT per year estimated at the project headworks). This paper presents the findings of the hydraulic flushing-based sediment management approach carried out using the SRH-1D model for the KAHEP project. The result suggests that a small sized KAHEP reservoir which would be filled within a year can be managed sustainably for a long run (25 years) if the water bypass tunnel and hydraulic flushing sediment management strategy are integrated together. Findings from the study suggest that with a bypass system routing inflows above design discharge (145 m3/sec) out of the reservoir, an annual 11 days of hydraulic flushing (each flushing event duration lasting for 1 day) carried out at a flushing interval of 28 days with a flushing and force flushing discharge of 700 m3/s and 900 m3/s, respectively, ensures the sustainability of live storage peaking volume of the project in long run. Moreover, the headpond created between the bypass tunnel intake and the headworks can function effectively as an in-basin desander, benefiting the project by omitting the construction of costly four 120 m × 20 m (each) underground desander bays.
Sustainable Sediment Management in Peaking Hydropower: A Case Study of the Kimathanka Arun Hydroelectric Project in Nepal
Sediment deposition poses a serious threat to the functioning of hydropower reservoirs worldwide. It not only affects the life of the reservoir and project functions, but also reduces the long-term benefits obtained from the project. The Kimathanka Arun Hydroelectric Project (KAHEP, 454 MW) is designed as a PRoR project located in Eastern Nepal. This project is located in the high sediment inflowing Himalayan Region (about 16.1 MT per year estimated at the project headworks). This paper presents the findings of the hydraulic flushing-based sediment management approach carried out using the SRH-1D model for the KAHEP project. The result suggests that a small sized KAHEP reservoir which would be filled within a year can be managed sustainably for a long run (25 years) if the water bypass tunnel and hydraulic flushing sediment management strategy are integrated together. Findings from the study suggest that with a bypass system routing inflows above design discharge (145 m3/sec) out of the reservoir, an annual 11 days of hydraulic flushing (each flushing event duration lasting for 1 day) carried out at a flushing interval of 28 days with a flushing and force flushing discharge of 700 m3/s and 900 m3/s, respectively, ensures the sustainability of live storage peaking volume of the project in long run. Moreover, the headpond created between the bypass tunnel intake and the headworks can function effectively as an in-basin desander, benefiting the project by omitting the construction of costly four 120 m × 20 m (each) underground desander bays.
Sustainable Sediment Management in Peaking Hydropower: A Case Study of the Kimathanka Arun Hydroelectric Project in Nepal
Water Res.Develop.Managem.
Mohd Sidek, Lariyah (Herausgeber:in) / Salih, Gasim Hayder Ahmed (Herausgeber:in) / Ahmed, Ali Najah (Herausgeber:in) / Escuder-Bueno, Ignacio (Herausgeber:in) / Basri, Hidayah (Herausgeber:in) / Acharya, Dhiraj (Autor:in) / Panta, Mohan Raj (Autor:in) / Acharya, Mohan (Autor:in)
International Conference on Dam Safety Management and Engineering ; 2023 ; Kuala Lumpur, Malaysia
05.02.2024
16 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Reservoir sedimentation , Peaking reservoir operation , Hydraulic flushing , Hydraulic model (SRH-1D) , Sustainable hydropower Environment , Environmental Management , Water, general , Security Science and Technology , Risk Management , Environmental Economics , Pollution, general , Earth and Environmental Science
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