The Tinau is a river originating from the Mahabharat Mountains and flowing through the Siwalik Hills and Terai Plain at Butwal, Nepal before joining the Ganges.
River morphology The main stem of the Tinau River originates at an altitude of 1300m.https://fbc.com.np/project/preparation-of-project-proposal-of-tinau-dano-in-rupandehi-district/ The length of the Tinau is 95 km starting from Palpa to Indo-Nepal Border at Marchawar. The catchment area of the river is about 1081 sq. km up to the border of which 412 km2 (41200 ha.) are in the Terai and 669 km2 of mountainous area.https://fbc.com.np/project/preparation-of-project-proposal-of-tinau-dano-in-rupandehi-district/
River flow The minimum flow of the river is about 2.2 m3/s in April while the calculated 100 years return period flow in 2500m3/s.
The maximum recorded flow at DHM station no 390 is as follows:
Year Maximum Flow (m3/s) 1964 417 1965 2200 1966 1180 1967 1950 1968 2000 1969 600 1984 390 1985 325 1986 644 1987 580 1988 565 1989 457 1990 260 1991 288 1992 134
Floods 1981
In 1981, there was a huge flood that destroyed two suspension bridges and the powerhouse shaft of Himal Hydro.
2007
In the flood of 2007 at least 500 households of Butwal municipality were displaced.
2008
In 2008, due to outburst of embankment, about 250 households were displace in Butwal municipality due to the flood.
Water use Hydropower Tinau Hydropower Plant
References