The Piyali leaves the Bidyadhari River 14 kilometres (9 mi) below Bamanghata and flows south and south-west till it joins the Matla River about 32 kilometres (20 mi) below Canning. The Piyali links to the Matla through the Kultala gang which also links to the Thakuran.
The Sundarbans area is intersected by an intricate network of interconnecting waterways, of which the larger channels are often 1.6 kilometres (0.99 mi) or more in width and run in a north-south direction. These waterways now carry little fresh water as they are mostly cut off from the Ganges, the outflow of which has shifted from the Hooghly–Bhagirathi channels progressively eastwards since the 17th century. This is due to subsidence of the Bengal Basin and a gradual eastward tilting of the overlying crust. The Piyali is heavily silted and most of it has been converted to low cultivated land, leaving only a narrow channel.
- Environment, population, and human settlements of Sundarban Delta By Anuradha Banerjee. Retrieved 2009-11-14.
- Mandal, Asim Kumar. The Sundarbans of India: a development analysis. Retrieved 2009-11-18.
- "Mangrove Forest in India" (PDF). Retrieved 2009-10-27.
- Naskar, Kumudranjan. Plant wealth of the lower Ganga Delta: an eco-taxonomical approach, Volume 1. Retrieved 2009-11-18.
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