Stonávka
The Stonávka is a river in the Czech Republic, a left tributary of the Olza. It flows through the Moravian-Silesian Region. It is long.
Etymology
The name is derived from the Czech word sténat, meaning 'murmuring river'.Characteristic
The Stonávka originates in the territory of Komorní Lhotka in the Moravian-Silesian Beskids at an elevation of and flows to Karviná, where it merges with the Olza River at an elevation of. It is long. Its drainage basin has an area of. The average discharge at its mouth is 1.47 m3/s.The longest tributaries of the Stonávka are:
| Tributary | Length | Side |
| Chotěbuzka | 9.5 | right |
| Černý potok | 7.6 | right |
| Mušalec | 6.0 | left |
| Ráztoka | 5.5 | right |