Kleine Lonau

Kleine Lonau is a tributary of the Große Lonau in Lower Saxony, Germany.
It rises at a height of 650 metres and flows through the Mariental valley to Lonau, where it merges with the Große Lonau. It is about 4.2 km (2.6 mi) long.

Source: Wikipedia https://en.wikipedia.org/wiki/Kleine_Lonau