Arun River (China–Nepal)
…form this river. The main rivers forming the Koshi system are – the Sun Koshi, the Indravati River, the Bhoté Koshi, the Dudh Koshi, the Arun River, Barun River, and 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…