|Main source||near Kanchenjunga|
|River mouth||Confluence with Arun and Sun Koshi to form Sapta Koshi at Tribeni, Nepal
|River system||Koshi River|
The Tambar Khola (, known as the Tamor River) is a major river in eastern Nepal, which begins around Kanchenjunga. The Tambar (Tamur River) and the Arun join the Sun Kosi at Tribenighat to form the giant Saptakoshi which flows through Mahabharat Range on to the Gangetic plain
Koshi river system
The Koshi or Sapt Kosi drains eastern Nepal. It is known as Sapt Koshi because of the seven rivers which join together in east-central Nepal to form this river. The main rivers forming the Koshi system are – the Sun Koshi, the Indravati River, the Bhote Koshi, the Dudh Koshi, Arun River, Barun River, and Tambar (Tamur River). The combined river flows through the Chatra Gorge in a southerly direction to emerge from the hills.
The Sun Koshi contributes 44 per cent of the total water in the Sapta Koshi, the Arun 37 per cent and the Tambar (Tamur River) 19 per cent.
- "a complete guide to Nepal's rivers". Sun Koshi river trip. . Retrieved 2010-05-14.
- Negi, Sharad Singh. "Himalayan rivers, lakes and glaciers". Kosi River System, p. 89. Retrieved 2010-05-14.
- Bahadur, Jagdish. "Himalayan snow and glaciers: associated environmental problems, progress". Kosi, p. 90. Google books. Retrieved 2010-05-14.
- K.L.Rao. "India's Water Wealth". p. 70. Retrieved 2010-05-25.
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