| Tinau | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Nepal |
| Subdivision Type3: | Region |
| Subdivision Name3: | Lumbini Province |
| Subdivision Type4: | District |
| Subdivision Name4: | Rupendehi, Palpa |
| Subdivision Type5: | Municipality |
| Subdivision Name5: | Butwal |
| Length: | 95km (59miles) |
| Discharge1 Min: | 2.2m3/s |
| Discharge1 Max: | 2500m3/s |
| Source1: | Churia Range |
| Source1 Location: | Palpa, Nepal |
| Source1 Elevation: | 300m (1,000feet) |
| Mouth Location: | Palpa |
| Tributaries Left: | Chidiya Khola |
| Tributaries Right: | Dovan Khola |
The Tinau is a Class- II category River originating from the Mahabharat Mountains and flowing through the Siwalik Hills and Terai Plain at Butwal, Nepal before joining the Ganges.
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.[1]
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:[2]
| 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 |
1981
In 1981, there was a huge flood that destroyed two suspension bridges and the powerhouse shaft of Himal Hydro.[3]
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.