Salient Features

  1. Name of Project: Bheri Babai Diversion Multipurpose Project
  2. Location: Surkhet District, Karnali Province, Nepal
  3. Type of Project: Run-off-the-River (ROR) Type
  4. Headrace Tunnel: (TBM)
    1. Length: 12019.0 m
    2. Type: Circular (Concrete Lined)
    3. Cross Section: Internal Finished Diameter 4.20 m
  5. Hydrology at Intake:
    1. Catchment Area: 12062 km2
    2. 100 Year's Flood (Q100): 5698 m3/sec
    3. Design Flood (Q1000): 7532 m3/sec
    4. Mean Monthly Flow: 331.89 m3/sec
    5. Minimum Monthly Flow: 75.68 m3/sec
  6. Headworks:
    1. Type: Barrage System with 6 Radial Gates
    2. Total Length of Spillway (Left to Right Abutments): 120m
    3. Operating Level/Pond Level: 459.00 masl
    4. High Flood Level: 460.50 masl
    5. Crest Level: 446.50 masl
    6. Radial Gate Size: 6 nos. 15.30m Width*13.00m Height each
    7. Intake Type:Side Intake on the Left Bank
    8. Intake Orifice Size: 6 nos. 4.50m Width*3.00m Height each
  7. Diversion During Construction:
    1. Diversion Flood (1 in 20 years Dry Season Flow): 120 m3/sec
  8. Settling Basin:
    1. Type: Surface Settling Basin
    2. Particle Size to be Removed: 0.20 mm
    3. No. of Bays: 6
    4. Length of Uniform Section: 110.0 m
    5. Total Length including Transitions: 132.40 m
    6. Size of Chamber: 7.50 m Width*5.0 m Height each
    7. Flushing Efficiency: 90%
    8. Flushing System: Intermittent Flushing System
  9. Powerhouse: Surface
    1. Total Capacity: 46.80 MW
    2. Nos. of Turbine: Total 3 (2 continuous running & 1 spare)
    3. Capacity of Turbine: 23.40 MW each
    4. Type of Turbine: Vertical Axis Francis
    5. Annual Energy Generation: 385 GWh
  10. Command Area (YRI): 51000 ha.
  11. Total Project Cost: NRs. 368077.42 Lakh
    1. Bheri Babai Diversion: NRs. 331966.42 Lakh
    2. Bheri Corridor Irrigation Development Project: 36111 Lakh
  12. Total Annual Benefit: NRs. 71300 Lakh
    1. From Irrigation: NRs. 31000 Lakh
    2. From Hydro Power (Firm Power): NRs. 40300 Lakh