Bhote Koshi
| Bhote Koshi (Poiqu) | |
|---|---|
Bhote Koshi near the Tibetan border during dry season
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| Basin features | |
| Main source | Zhangzangbo Glacier, Tibet 8,012 m (26,286 ft) |
| River mouth |
Sun Kosi near Balephi, Sindhupalchowk, Nepal 640 m (2,100 ft) 27°43′58″N 85°46′47″E / 27.73278°N 85.77972°ECoordinates: 27°43′58″N 85°46′47″E / 27.73278°N 85.77972°E |
| River system | Koshi River |
The Bhote Koshi is the upper river course of the Sun Kosi, known as Poiqu in Tibet. It is part of the Koshi River system in Nepal.
A western tributary of the upper Dudh Koshi is also called Bhote Koshi.
The headwaters of Poiqu and Bhote-Sun Koshi River are located at the Zhangzangbo Glacier in Tibet. The river flows out of the Lumi Chimi lake. When entering Nepal, it is called Bhote Koshi. Further downstream, from the village of Bahrabise onwards, it is called Sun Koshi.
In July 1981, a sudden ice avalanche caused a Glacial Lake Outburst Flood in the moraine-dammed Zhangzangbu-Cho Lake in the headwaters of the Bhote Koshi. The ensuing debris flow destroyed bridges, and sections of both the Arniko and the Nepal–China highways.
Nepali: भोटे कोशी; Chinese: 波特科西; pinyin: Bōtè Kēxī
In Nepali language, the word "bhoṭe" or "bhoṭiyā" means Tibetan; and the word "kosi" means river.
The Bhote Kosi is used for both rafting and kayaking. It is the steepest river rafted in Nepal, with a gradient of 15 m per km. Bungee jumping or swinging over the Bhote Kosi has been described as the ‘ultimate experience’.
The river carves a steep and direct drop at the top that gradually eases to more placid streams and calmer pools with a 46-km run at the Lamosunga dam. The rapids are class IV-V at high flow, and III at lower levels. The river is steep and continuous with one rapid leading into another.
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