The Hurasagar River, or Hoorsagar, is a major river of Bengal that formerly flowed into the Ganges, but now joins the Jamuna. It receives water from the Baral, the Phuljhar (which is the combination of the Karatoya and the Bangali).
It is joined to the Ichhamati River by a system of locks.
References
Hurasagar River Wikipedia(Text) CC BY-SA