The Koshi River is one of the major rivers in Nepal, known for its significant role in the region's ecology and economy. It originates from the Himalayas and flows through eastern Nepal before entering India. The river is approximately 507 kilometers long and is a tributary of the Ganges River. The Koshi River basin is prone to flooding, especially during the monsoon season, which can impact local communities. The river is also vital for irrigation and supports agriculture in the surrounding areas. Its diverse ecosystem includes various species of fish and birds, making it an important natural resource.