Sikkim has two major rivers, the Teesta and the Rangeet, both of which are framed at high heights and stream in a for the most part southern bearing till they meet at the confluence close to Melli.
The wellspring of the Teesta is the immaculate Tso Lhamu Lake in North Sikkim, somewhere in the range of 5,300 meters above sea level. The icy waters at that point move downwards to meet Zemu Chu simply above Lachen town and afterward surging down profound chasms it meets Lhachung Chu at Chungthang.
At Mangan, the river is joined by the Talung Chu as it proceeds with its adventure down, at last achieving Singtam in East Sikkim, winding up slower and enlarging to twofold its width. Additionally down at Melli, the Teesta converges with the river Rangeet which is conceived of the Rathong ice sheet in West Sikkim, before entering the fields of North Bengal and inevitably joining Brahmaputra in Bangladesh.
C. Sikkim is located in northeastern India and is bordered by Tibet, Bhutan and Nepal. It covers 7,096 square kilometers of land and has a total population of more than 600 thousand people. There are many rivers in Sikkim, but the two major rivers of this place are Teesta and Rangeet. Teesta originates from Paunhuri Mountain which has an elevation of 23,386 feet and flows from Bangladesh until it reaches the Bay of Bengal.
Rangeet or Rangit is a tributary of Tessta river and originates from Rathong glacier found in the western part of Sikkim. It flows through North Bengal until it reaches Brahmaputra in Bangladesh. Some of the rivers which can be found in Sikkim are as follows: Takcham Chu, Aho Khola, Lachung Chu, Rate Chu, Resh Chu and Ongchu.