Zemu Glacier is the largest glacier in the Eastern Himalaya.
It is about 26 kilometers (16 mi) in length and is located at the base of Kanchenjunga in the Sikkim Himalaya, India. It may be one of the sources for the Teesta River.
The Zemu Glacier drains the east side of Kanchenjunga, the world’s third highest mountain. The glacier is the source of water for numerous rivers, as it feeds them when it melts. One of them is the Teesta River, which has garnered large attention in the past few years because of a proposed 3500 mW hydro power plant. At the moment the Government of Sikkim has only been able to run a 510 mW plant on the river. Owing to the location of the river in an earthquake prone area, the hydro power plants will be a run of the river project.
Zemu Glacier remains a less studied and monitored glacier. Studying digital imagery shows that the glacier has receded 27 meters every year between 1967-1984. The retreat is not massive given the great length of the glacier. There is a thick layer of debris on the glacier, preventing ablation: there are, however, small lakes that have formed on the surface of these debris-covered sections of the glacier.0