The Kosi River is a major river in northern India and Nepal. It is known for its unique and dynamic behavior, often changing its course due to sediment deposition. The river is approximately 505 kilometers long and is a tributary of the Ganges River, contributing significantly to the region's water supply and agriculture. The Kosi River basin is home to diverse ecosystems and supports various wildlife species. It plays a crucial role in the livelihoods of millions of people living along its banks, providing water for irrigation and fishing. However, the river is also prone to flooding, which can lead to significant challenges for local communities.