|Bochum , North Rhine-Westphalia , Germany
|Lottenbach → Oelbach → Ruhr → Rhine → North Sea
|on Lennerhofshofstrasse at Bochum University of Applied Sciences
|west of the grounds of the Klosterbusch colliery in a reservoir of the Lottenbach
The Kalwesbach is a left tributary of the Lottenbach in Bochum-Querenburg . It is the largest tributary of the Lottenbach. It rises on Lennershofstrasse at the Bochum University of Applied Sciences and flows in a notch valley between the Ruhr University Bochum , the Botanical Garden of the Ruhr University Bochum and the Kalwes mountain through the Klosterbusch forest into the Lottental. It absorbs wastewater from both universities. It flows into a reservoir of the Lottenbach to the west of the Klosterbusch colliery . Its water quality is grade II.