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Sedimentation Modeling of Karnali Chisapani Multipurpose Project Reservoir, Nepal
https://orcid.org/http://orcid.org/0000-0002-8219-2127
Nepal is in the early phase of reservoir development and planning to construct some reservoir hydro projects soon. Karnali Chisapani Multipurpose Project (KCMP) with a 270-m high gravel fill embankment dam confirming 10,800 MW installed capacity in the Karnali River at Chisapani is one of the projects. Most of the rivers in Nepal bear high sediment load. But, till date no attempt has been made to simulate the sediment transport and its deposition pattern in the reservoir projects in Nepal. Therefore, the current study tries to investigate the potential sedimentation profile of the KCMP reservoir during its operational phase. One-dimensional (1D) HEC-RAS numerical model for simulation was run for 10, 20, 30, 50, 75, and 100 years. The extreme deposition of sediment was found to occur in the region 60 to 115 km upstream of the KCMP dam site with the highest sediment deposition depth of around 42 m, 49 m, 57 m, 74 m, 98 m, and 124 m in 10, 20, 30, 50, 75, and 100 years, respectively. Besides, about 3.23%, 6.49%, 9.72%, 16.24%, 24.36%, and 32.52% storage capacity of the reservoir will be lost in 10, 20, 30, 50, 75, and 100 years, respectively. The results of the present case study are envisaged to deliver valuable data to the planners and policymakers of this project and will exhibit a way forward for the other similar projects that are going to be designed and implemented in the future in Nepal.
Sedimentation Modeling of Karnali Chisapani Multipurpose Project Reservoir, Nepal
https://orcid.org/http://orcid.org/0000-0002-8219-2127
Nepal is in the early phase of reservoir development and planning to construct some reservoir hydro projects soon. Karnali Chisapani Multipurpose Project (KCMP) with a 270-m high gravel fill embankment dam confirming 10,800 MW installed capacity in the Karnali River at Chisapani is one of the projects. Most of the rivers in Nepal bear high sediment load. But, till date no attempt has been made to simulate the sediment transport and its deposition pattern in the reservoir projects in Nepal. Therefore, the current study tries to investigate the potential sedimentation profile of the KCMP reservoir during its operational phase. One-dimensional (1D) HEC-RAS numerical model for simulation was run for 10, 20, 30, 50, 75, and 100 years. The extreme deposition of sediment was found to occur in the region 60 to 115 km upstream of the KCMP dam site with the highest sediment deposition depth of around 42 m, 49 m, 57 m, 74 m, 98 m, and 124 m in 10, 20, 30, 50, 75, and 100 years, respectively. Besides, about 3.23%, 6.49%, 9.72%, 16.24%, 24.36%, and 32.52% storage capacity of the reservoir will be lost in 10, 20, 30, 50, 75, and 100 years, respectively. The results of the present case study are envisaged to deliver valuable data to the planners and policymakers of this project and will exhibit a way forward for the other similar projects that are going to be designed and implemented in the future in Nepal.
Sedimentation Modeling of Karnali Chisapani Multipurpose Project Reservoir, Nepal
https://orcid.org/http://orcid.org/0000-0002-8219-2127
Nepal is in the early phase of reservoir development and planning to construct some reservoir hydro projects soon. Karnali Chisapani Multipurpose Project (KCMP) with a 270-m high gravel fill embankment dam confirming 10,800 MW installed capacity in the Karnali River at Chisapani is one of the projects. Most of the rivers in Nepal bear high sediment load. But, till date no attempt has been made to simulate the sediment transport and its deposition pattern in the reservoir projects in Nepal. Therefore, the current study tries to investigate the potential sedimentation profile of the KCMP reservoir during its operational phase. One-dimensional (1D) HEC-RAS numerical model for simulation was run for 10, 20, 30, 50, 75, and 100 years. The extreme deposition of sediment was found to occur in the region 60 to 115 km upstream of the KCMP dam site with the highest sediment deposition depth of around 42 m, 49 m, 57 m, 74 m, 98 m, and 124 m in 10, 20, 30, 50, 75, and 100 years, respectively. Besides, about 3.23%, 6.49%, 9.72%, 16.24%, 24.36%, and 32.52% storage capacity of the reservoir will be lost in 10, 20, 30, 50, 75, and 100 years, respectively. The results of the present case study are envisaged to deliver valuable data to the planners and policymakers of this project and will exhibit a way forward for the other similar projects that are going to be designed and implemented in the future in Nepal.
Sedimentation Modeling of Karnali Chisapani Multipurpose Project Reservoir, Nepal
J. Inst. Eng. India Ser. A
Regmi, Ram Krishna (author)
Journal of The Institution of Engineers (India): Series A ; 102 ; 815-827
2021-09-01
13 pages
Article (Journal)
Electronic Resource
English
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