In the Sri Caitanya-caritamrta (Madhya 5, text 141), Srila Prabhupada gives its translation and purport as follows:
kamalapure asi bharginadi-snana kaila
nityananda-hate prabhu danda dharila
Translation: When Sri Caitanya Mahaprabhu arrived at Kamalapura, He took His bath in the river Bhargavi and left His sannyasa staff in the hands of Lord Nityananda.
Purport by Srila Prabhupada: In Sri Caitanya-bhagavata (Antya Khanda, chapter two) it is said that when Lord Sri Caitanya Mahaprabhu arrived at Sri Bhubanesvara, He visited the temple of Lord Siva known as Gupta Kashi (the concealed Varanasi).
Lord Siva established this as a place of pilgrimage by bringing water from all holy places and creating the lake known as Bindu Sarovara. Sri Caitanya Mahaprabhu took His bath in this lake, feeling a great regard for Lord Siva. From the spiritual point of view, people still go to take bath in this lake. Actually, by taking a bath there, one becomes very healthy even from material viewpoint. Taking a bath and drinking the water of this lake can cure any disease of the stomach. Regular bathing certainly cures indigestion.
The river Bhargi (Bhargavi), or Bhargi Nadi, came to be known as the Dandabhanga Nadi after Lord Caitanya bathed in its waters. It is situated six miles north of Jagannath Puri.
From these words of Srila Prabhupada, it is a known fact that the Dandabhanga Lila had taken place 6 miles away from Sri Jagannath Puri (at Kamalapur), on the bank of river Bhargavi. Even now, the local residential people still address this branch of the river Bhargavi as “Dandabhanga Nadi”.