The Kubršnica originates from the Venčac mountain, in the Jasenica sub-region of Šumadija, in the wider area of the town of Aranđelovac.

Its tributary, Veliki Lug, was described in March 2019 by the environmentalists a "conditional river", because for a long time it has been notorious for the pollution.

The river is so devastated by the communal and industrial waste from Mladenovac, Sopot and nearby settlements, that it turned into an open wastewater collector.

[1] The eastern river valley is a natural route for the section of the Belgrade-Niš railroad, while the Belgrade-Kragujevac road passes through the western part.

The lower parts of the flow are regulated to prevent floods during rainy years, but not to greater effect.