Impact of Reservoir Sedimentation on Hydroelectric Power Generation: Case Study of Kulekhani First Hydropower Station
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Pulchowk Campus
Abstract
Reservoir Hydropower Plants are more reliable than the Run-off Plants. Kulekhani First
Hydropower Station is the reservoir type Hydropower Station. It is 60 MW plant and is
very reliable power plant of Nepal. Electricity produced from each m3
of reservoir water
is calculated as 1.27 kWh. Sedimentation data from the primary and secondary sources
were taken for analysis. Trend lines and bar charts were used for analysis and
forecasting purpose.
The reservoir is being filled by sediment after its commissioning in 1982 and annual
sedimentation rate in total volume is found to be 0.73 Mm3
and in active volume is
found to be 0.65 Mm3
. With the decrease of the active volume, the energy generation
capacity of KL1HPS is also decreasing at the rate of 826.46 MWh per year. It is
estimated that active volume will be filled in about 2100 AD which means the estimated
life is about 80 years from now. With the decrease of the active volume, the energy
generation capacity of KL1HPS is also decreasing and after about 80 years the KL1HPS
plant will be run off river plant.
Use of sediment removal system will gradually decrease the sediment content in the
reservoir. The time period for dredging of all the sediments in active volume is found to
be about 8 years and total cost incurred is found to be NRs. 21.57 Billion with simple
payback period of about 50 years. The time period for dry excavation of all the
sediments in active volume is found to be about 1 year and total cost incurred is found
to be NRs. 26.98 Billion with simple payback period of about 78 years.
Description
Reservoir Hydropower Plants are more reliable than the Run-off Plants. Kulekhani First
Hydropower Station is the reservoir type Hydropower Station.
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Citation
MASTER OF SCIENCE IN ENERGY SYSTEM PLANNING AND MANAGEMENT