The river Lukne flows in Raseiniai district, the river Dubysa left tributary. Length of the river 33 km, the basin area 132 km ². The source at Antaniskiai village, 7 km southeast from Siluva town. Upstream section called the Zobra. In upstream section flows to the southwest, in middle section to southeast, in lower section to south. Flows into the river Dubysa 54 km from its mouth at Dvarvieciai village. Average gradient 256 cm/km. Average rated discharge at the mouth 0.82 m³/s.

At high water level. Spring flood, or after heavy rains.
Rapids, shalows, strainers.
WW 1-/1 (2).

5.9 The dam of Kaulakiai HPP. Height 6.5 m. right Kiaulakiai. The current fast. The river flows through forest, rapids, stones, boulders. The valley deep, the banks high, steep. Average gradient to the mouth 586 cm/km. Average rated discharge approx. 0.8 m³/s. A bit downstream, in some places wires across the river!
5.4 right Kybarteliai.
4.4 left Riogliskiai.
0.9 The log bridge.
0.0 The Lukne flows into the river Dubysa. The confluence can be reached by country road from Dvarvieciai village.