जनताको जलविद्युत कार्यक्रम

S. No

Parameters

Details

1

General

Project Name

Phukot Karnali Hydro Electric Project

Location

Karnali Province, Kalikot District

Co-ordinates of the Project Area

29⁰19’03” N to 29⁰09’32” N latitude,

81⁰45’00” E to 81⁰35’28” E longitude

Nearest Highway

Karnali Highway

Nearest All Weather Airport

Surkhet Airport - 160 km from project site

Alternative  All Weather Airport

Nepalgunj Airport – 260 km from project

site

River

Karnali

Climate

Moderate

2

Organization

Developer

Vidhyut Utpadan Company Ltd.

Consultant

NEA Engineering Company Ltd.

3.            Hydrology

Catchment Area

16,902 km2

Mean Annual flow

328 m3/s

Maximum Monthly Discharge

881.50 m3/s

Minimum Monthly Discharge

77 m3/s

Design Discharge

348 m3/s

1 in 100 years flood (Q100)

3,648 m3/s

1 in 1000 years flood (Q1000)

4,813 m3/s

1 in 10,000 years flood (Q10,000)

5,956 m3/s

Probable Maximum Flood (QPMF)

15,882 m3/s

4.           Reservoir

Gross storage volume

79.78 Mm3

Live storage volume upto 904 masl

14.29 Mm3

Surface area at FSL

2.51 km2

Storage required for 6 hours peaking

7.52 Mm3

Length of Reservoir at FSL

11 km

Dry Season Full Supply Level

910 masl

Minimum Draw Down level

904 masl

5.            River Diversion Works

Diversion Discharge

2,777 m3/s (1 in 20 years flood)

Number of Tunnels

2 Nos.

Size and Shape

11 m diameter Circular shape

Lining

Concrete Lining

U/S Coffer Dam

Location

235 m u/s from Dam Axis

Height

36 m

Top Length

145 m

D/S Coffer Dam

Location

375 m d/s from Dam Axis

Height

8.5 m

Top Length

100 m

6.

Sediment By-Pass Tunnel

Location

775 m U/S from Dam axis

Number of tunnel

1 No.

Size and Shape

11 m diameter Cirular

Length

651m

9.            Dam

Type of Dam

Roller Compacted Concrete (RCC)

Location of Dam

Approx. 1.5 km D/S from Sanigad

Confluence

Dam length at top

313 m

Dam Height

109 m from River Bed

160 m from Foundation Bed

Top Width

10.0

Dam Top elevation

915.00 masl

10.          Spillway

Overflow Spillway

Type

Ogee and gated

Crest elevation

891 masl

Number and Size of gates

3 Nos., 13.5 m x 22.0 m (B X H)

Energy Dissipation

Flip Bucket

Sluice Spillway

Type

Ogee

Crest elevation

860 masl

Number and Size

3 Nos. , 7 m x 13 m(B X H)

Energy Dissipation

Flip Bucket

Trash Overflow Spillway

Type

Ogee

Crest elevation

902.5 masl

Number and Size

1 No. , 4m X 3 m

Energy Dissipation

Flip Bucket

11.          Power Intake

A

Main Power Intake

Type of Intake

Side intake

Number and Size of Trashrack openings

8 Nos., 4.8 m x 28 m (BXH)

Number and Size of Intake Gate

2 Nos., 8.4 m x 8.4 m (BXH) vertical lift

gate

Dry Season Design Discharge

348 m3/s

Wet Season Design Discharge

361 m3/s

Environmental Riparian Release

7.7 m3/s

Invert Level

883 masl

Deck Level

915 masl

Trash rack

Inclined at 80⁰ with horizontal

B

For Environment Release PH

Type of Intake

Embedded in dam

Number and Size of Trashrack opening

1 No., 3.8 m x 3.1 m (BxH)

Number and size of Intake Gates

1 No., 2.1 m x 2.1 m

Invert Level

883 masl

Design Discharge

7.7 m3/s

Trash Rack

Vertical

12.         Headrace Tunnel

Number

2 Nos.

Size and Shape

8.4 m Diameter Circular shape

Length

5831.66 m and 5597.20 m

Lining

300 mm thick Reinforced Concrete

Circular Lining

Maximum velocity

3.3 m/s

13.         Surge Tunnel

Type

Surge Tunnel (Slope: 1V:10H)

Number

2 Nos.

Length

764.10 m and 773.64 m

Diameter

8.0 m circular

Upsurge level

924.28 masl

Downsurge level

883.59 masl

14.         Pressure Shaft and Tunnel

Number

2 Nos.

Orientation

Vertical and horizontal

Diameter

6.5 m diameter circular (main), 5.3 m

and 3.75 m (after bifurcation)

Total Length

408.54 m & 520.32 m

Lining

Steel Lining (20 mm to 40 mm) for both

15.         Powerhouse

Main Powerhouse

Type

Underground

Installed Capacity

474 MW

Cavern Size

156 m X 20 m X 44.6 m (L X B X H)

Number and capacity of units

6 Nos. x 79 MW

Type of Turbine

Francis, Vertical Axis

Normal Tail water level

741.38 masl

Gross Head

168.62 m

Rated Net Head

159.60 m

Machine Floor Level

742.54 masl

Generator Floor Level

737.94 masl

Turbine Floor Level

733.64 masl

Turbine Center Line Level

731.74 masl

Powerhouse for Environmental Release

Type

Surface

Installed Capacity

6 MW

PH Size

37.15 m X 10.5 m X 15.85 m (L X B X H)

Number and capacity of units

2 Nos. x 3 MW

Type of Turbine

Francis, Horizontal Axis

Normal Tail water level

815 masl

Gross Head

95 m

Rated Net Head

88.88 m

Machine Floor Level

813.70 masl

Generator Floor Level

813.70 masl

Turbine Floor Level

813.7 masl

Turbine Center Line Level

815.60 masl

16.         Tailrace Tunnel

Number

2 Nos.

Size and Shape

9.5 m Diameter Circular shape (Finished)

Lining

500 mm thick Concrete Circular Lining

17.          Energy

Wet Season Energy

1703.8 GWh/yr

Dry Season Peak Energy

481.05 GWh/yr

Dry Season Off Peak Energy

263.75 GWh/yr

Dry Season Total Energy

744.79 GWh/yr

Total annual energy

2447.88 GWh

18.          Transmission line

Connection Length

2.3 km appox

Voltage

400 kV

19.          Construction period                                                  5 years

20.          Project cost

Exchange rate

(1 US$ = NRs. 116.57)

Total (before IDC)

82,210,013    (amount in ‘000)

Total financial (after IDC)

92,300,000    (amount in ‘000)

Specific project cost (financial)

192,292       (amount in ‘000)

21.          Financial and economic indicators

Interest rate

11 %

IRR

13.53 %

EIRR/ROE (Return on Equity)

16.72 %

NPV

24,467,165 NRs.

B/C

1.37

Payback Period -Simple

5.96 Years

Payback Period - Discounted

8.95 Years