| S.N. |
Items |
Description |
| 1. |
Project Name |
Bheri Babai Diversion Multipurpose Project |
| 2. |
Location |
Bheri Ganga Municipality of Surkhet District, Karnali Province |
| 3. |
Type of project |
Run-of-the-River (ROR) Type |
| 4. |
Command Area |
51,000.00 Ha |
| 5. |
Hydrology at intake |
| |
Catchment area |
12062 km2 |
| |
100 year flood (Q100) |
5698 m3/s |
| |
Design flood (Q1000) |
7532 m3/s |
| |
Mean monthly flow |
331.89 m3/s |
| |
Minimum monthly flow |
75.68 m3/s |
| 6. |
Headworks |
| |
Type |
Barrage System with 6 Radial Gates |
| |
Operating level/Pond level |
455.00 masl |
| |
High flood level (For Q100) |
453.58 masl (All gates open condition) |
| |
High flood level (For Q1000) |
455.95 masl (All gates open condition) |
| |
Crest elevation |
442.50 masl |
| |
Radial gate Size |
6 nos 15.30 m Width × 13.0 m Height each |
| |
Intake type |
Side intake on the left bank |
| |
Intake orifice size |
6 nos. 4.5 m Width × 3.0 m Height each |
| 7. |
Diversion during construction |
| |
Diversion flood (1 in 20 years dry season flow) |
574.06 m3/s |
| 8. |
Approach Canals |
| |
Number |
3 nos. |
| |
Average Length |
43.15 m |
| |
Type |
Rectangular type |
| 9. |
Settling basin |
| |
Type |
Surface settling basin |
| |
Particle size to be removed |
0.2 mm |
| |
Number |
3 bays |
| |
Length of uniform section |
115.0 m |
| |
Total length including transitions |
157.40 m |
| |
Width |
15.0 m each |
| |
Height |
6.65 m |
| |
Flushing Efficiency |
90 % |
| |
Flushing system |
Intermittent flushing system |
| 10. |
Waterways |
| 10.1 |
Headrace Tunnel |
| |
Length |
12,174 m |
| |
Type |
Circular; Concrete lined |
| |
Cross section |
Internal Finished Diameter 4.20 m |
| 10.2 |
Surge Shaft |
| |
Type |
Restricted orifice with upper expansion chamber type |
| |
Internal equivalent circular diameter |
12.50 m |
| |
Area of upper expansion chamber |
380.00 m2 |
| |
Height |
58 m |
| 10.3 |
Penstock |
| |
Material |
Mild steel (ASTM A516 Grade 60) |
| |
Length before trifurcation |
Total 808m, (Inside Tunnel 100 m, Surface 85 m, Buried 623 m) |
| |
Length after trifurcation |
Total 75m, (27.0 m, 21.0 m, 27.0 m with 2.72 m in diameter) |
| |
Internal diameter |
3.85 m |
| |
Thickness of pipe |
14 to 36 mm |
| 11. |
Powerhouse |
| |
Powerhouse type |
Surface |
| |
Outer Dimension of PH |
51.25 m long and 16 m wide. |
| 12. |
Tailrace |
| |
Design Tailwater level |
307.72masl |
| |
Type |
Rectangular RCC box culvert |
| |
No |
3 nos |
| |
Length |
21.85 m |
| |
Size |
4.6 m wide ×3.3 m high |
| |
100 year flood (Q100) in Babai River |
4879.0 m3/s |
| |
Design flood (Q1000) in powerhosue |
6761.0 m3/s |
| 13. |
Turbine |
| |
Turbine type |
Vertical Axis Francis Turbine |
| |
Number of units |
3 Numbers (One spare unit) |
| |
Rated speed, n |
375 rpm |
| |
Turbine Axis Level |
306.72 masl |
| 14. |
Power and energy output |
| |
Gross head |
147.28 m |
| |
Rated net head |
130.59 m |
| |
Design discharge |
40.0 m3/s |
| |
Installed capacity |
46.72 MW |
| |
Total estimated annual energy |
384.51 GWh |
| 15. |
Transmission line |
| |
Voltage |
132 kV |
| |
Length |
5.0 km |
| 16. |
Switchyard |
| |
Dimension (L × B) |
40 m × 37 m |
| |
Voltage level |
132 kV |
| |
Type |
Outdoor AIS |
| 17. |
Project Cost |
|
| |
Total Cost in NRs. |
29,97,000,0000 |
| 18. |
B/C Ratio |
1.92 |
| 19. |
EIRR |
16.65% |
