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Location:
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Danabari and Chisapani VDC, Ilam District, Eastern Development Region of Nepal
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Purpose of Project:
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To supply for domestic use by connecting to national grid
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Hydrology:
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Catchment Area
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589.0 km2
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Design Flow
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16.0 m3/s (48.31% ecceedance flow)
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90% Exceedance flow
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7.48 m3/s
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Design Flood (Q100)
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2070 m3/s
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Design Flood (Q1000)
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3007 m3/s
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Diversion Dam:
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Type
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Free flow Concrete gravity dam
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Slope
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Ogee-profile
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River Diversion During Construction:
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Alignment
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Along the river channel
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Coffer dams
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Two cofferdams facilitating stage1 and stage2 concreting total coffer dam
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Intake:
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Type
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Frontal Intake, submerged, over the undersluice
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Number of chamber
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3
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Undersluice:
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22 m width ,7.60 height , length=40 m ,6m*2m gate dimension, gatetype:Radial, gateno:3
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Intake canal:
Type:RCC
Length:
Width:
Height:
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RCC open canal
81m
9 m
5.1 m (approx)
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Settling Basin:
Type:
Length:
Width:
Height:
No of basin
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Surface
75m
28.70m
6.40m
4
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Headrace culvert
Type:
Length:
Breadth:
Height:
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Convensional flushing
RCC pressurized culvert
1077 m
4.10 m
3.90 m
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Headrace Tunnel:
Type:
Length:
Diameter:
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Inverted D
Inverted D
2020 m
3.80 m
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Surge Shaft
Type:
Diameter:
Height:
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Vertical, circular section
Cylindrical/Vertical
8 m
28.20 m
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Diversion dam
Type,Height,Width
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Ogee shaped,10.60 m ,74.00 m
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Powerhouse
Length,breadth,height,type
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27.30 m, 21.90 m ,24.50 m ,Surface
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Penstock
Type,diameter,length,turbine
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Steel,2.35 m ,3.55m ,2 *Francis
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Tailrace
Type,breadth,height,length
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RCC canal,4.10 m,3.90 m ,264 m
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Energy:
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Gross Head
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121.6 m
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Installed capacity
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15.6 MW
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Dry energy
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20748022 KWh
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Wet energy
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82451859 KWh
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Annual Net Energy Output
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103199881 KWhr
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Project Cost:
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2,658 million NPR (34.08 million USD),
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Cost per kW installed Capacity
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2,185 USD/kW
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