Introduction to Hydroelectricity in Nepal
Nepal possesses one of the highest hydropower potentials in the world due to its rugged Himalayan terrain and thousands of fast-flowing rivers. Hydroelectricity is generated by harnessing the energy of falling or flowing water to produce clean and renewable electricity.
Why is Nepal ideal for hydropower?
Over 6,000 rivers and steep gradients give Nepal ~83,000 MW technical and 42,000–45,000 MW economically feasible potential.
When did it start in Nepal?
The first plant was commissioned in 1911 at Pharping (500 kW) — one of Asia's earliest hydropower stations.
Current installed capacity (Jan 2026)
Approximately 3,400–3,800 MW installed — still only ~8–9% of the economically viable potential.
Most common type
Majority are run-of-the-river projects; few storage-type plants (like Upper Tamakoshi) exist.
Interactive Hydroelectric Plant Simulation
Water Level
85%
Flow Rate
100 RPM
Power Output
0 MW
💡 Bulb is OFF
Importance in Nepal
Thousands of rivers
Over 6,000 Himalayan rivers provide huge potential.
High power potential
≈ 42,000–45,000 MW economically feasible
Clean & renewable
No ongoing fuel cost
Reduces import
Decreases electricity import from India
Major Hydroelectric Projects
Pharping (1911)
First plant – 500 kW
Upper Tamakoshi
Largest operating – 456 MW
Kali Gandaki A
144 MW run-of-river
Future projects
Arun-3 (900 MW) & others
Advantages & Disadvantages
Advantages
Renewable & clean
No fuel required after construction
Low running cost
Only maintenance needed
Flood control
Helps manage river flow
Disadvantages
High construction cost
Very expensive to build
Displaces people
Affects communities & land
Less power in dry season
Lower output when water is low
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