Nabadwip, the birthplace of Chaitanya Mahaprabhu is located in the west bank of the Bhagirathi.

The name Jalangi derives from two Bengali words Jal (Water) and Angi (who (female) possess body).

[5] The Jalangi leaves the Ganges or Padma at the extreme north of the Nadia district at 24°05´26´´ N and 88°41´53´´ E and joins the river Bhagirathi at Swarupganj (23°24´42´´ N and 88°22´50´´ E), opposite Nabadwip, the birth-place of Sri Chaitanya.

Total length from Offtake at Char-Madhubona to Bhagirathi-Jalangi Confluence at Swarupganj 233 km [5]The Jalangi is a modern stream, but its age is not known.

Apparently it opened up long after the Bhairab River ran as a strong stream in a south easterly direction.

Although it is generally believed that the river has opened up within the last few hundred years, there is no direct evidence of this.

The Mathabhanga is a younger stream than Jalangi and it was not till very recently that the river completed its junction with the Hooghly by adopting the Churni (now its lower reaches) for its main course.