The Phung Hiep canal, over 100 km long, connects Ca Mau to Nga Bay, Can Tho City, passing through the areas of Gia Rai, Phuoc Long, Hong Dan, to Nga Nam and then up to Nga Bay.

In Ca Mau, the Phung Hiep canal is the intersection of three waterways, often referred to by locals as the Chua Ba junction, including the Ong Doc River, the Ganh Hao River, and the Bac Lieu canal.