Ghunsa Khola Hydroelectric Project is proposed to be developed in Lelep VDC of Taplejung District of Nepal, utilizing the flow of Ghunsa Khola, a tributary of Arun River. The scheme is 71.5 MW Run-of-Rive type hydropower project with a gross head of 358 m and design discharge of 27.31 cumec at 38.75% flow exceedance level. Based on the earlier study, the proposed major structures of the project are a 9 m high and 49.5 m long weir and two intakes (4 m x 3.68 m). A two chambered underground desanding basin of 76 m length. The headrace tunnel is 3.675 km long, which will lead to a 30.1 m high surge shaft. The design flow will be directed towards the underground powerhouse through a 345.16 m high vertical shaft followed by a 215 m long horizontal penstock tunnel. The estimated annual energy generation from the project will be 414.853 GWh and the electricity generated will be evacuated through the Koshi Corridor.
Salient Features
Name of the River | : | Ghunsa |
Location | : | Taplejung District, Nepal |
Layout | : | Right bank |
Type of Scheme | : | Run-of-river |
District | : | Taplejung |
Latitude | : | 270 30’ 00”N to 270 31’ 46” |
Longitude | : | 870 47’ 21”E to 870 52’ 14” |
Type of Power Generation | : | Run-of-river |
Catchment area at intake site | : | 738 Km2 |
Gross Head | : | 358 m |
Net Head | : | 341.6 m |
Design Discharge (Q40) | : | 27.31 m3/s |
Weir | : | 49.5 m long, 9 m high |
River Intake | : | Two Nos., 4 m wide and 3.68 m high |
Connecting Tunnels | : | 2 Nos., 4 m wide and 4.75 m high |
Desanding Basin | : | Underground, 2 chambered, 76 m long |
Headrace Tunnel | : | 3.675 km long, 3.1 m dia |
Surge Shaft | : | Underground, 30.1 m high, 10 m dia |
Vertical Shaft | : | 345.16 m high, 2.6 m dia |
Horizontal Penstock Tunnel | : | 215 m long, 2.6 m dia |
Powerhouse | : | Underground 75 m (L) x 15.6 m (B) x31 m (H) |
Tailrace Tunnel | : | 348.5 m long, 5 m dia |
Installed Capacity | : | 78,000 kW |
Total Annual Energy (GWh) | : | 414.853 GWh |
Power Evacuation | : | Proposed Koshi Corridor |