Its waters pour out under the ground and they appear on the surface 120 m away from the lake and form the beginning of the river Sinanishka, a left tributary of the Vlahina reka of the Struma river basin.
The water from this underground source breaks through the ground 120 m away from the lake and forms the starting point of the Sinanishka River, a left-hand flow into the Vlahina reka within the broader Struma river network.