It flows to the south direction through Syverma Plateau and joins Nizhnyaya Tunguska near the town Tura.

The confluence of Kochechum and Nizhnyaya Tunguska corresponds to the farthest point of fairway section upstream off the Yenisey.

Due to average temperatures below freezing in this area, its watershed belongs to the region of continuous permafrost with a frozen layer that varies in depth between 50 and 200 metres (160 and 660 ft).

The permafrost effectively blocks any underground supply; all water flowing through the river comes from snow and rain.

The flow of the Kochechum strongly depends on the season, approaching zero in early spring and reaching its maximum in June.