- The Kosi River consists of seven streams, namely, Sun Kosi, Tamba Kosi, Talkha, Doodh Kosi, Botia Kosi, Arun and Tamber.
- Thus, it is popularly known as Saptkaushiki or Sapta Kosi.
- It is a river in Nepal and northern India.
- Seven rivers mingle with each other to form three streams named the Tumar, Arun and Sun Kosi.
- Then all three streams unite at Triveni north of the Mahabharat Range to form the Kosi.
- The Kosi joins Ganga in the Katihar district of Bihar.
- Kosa is also known as “the sorrow of Bihar” as this causes the flood in the region.