The black lab
The name Laber most likely comes from “labara”, which in the language of the Central European Celts meant something like “the chattering, intoxicating one”. Another origin of the name could also go back to the Bavarian term “lap” (sluggish, slow, lazy), in reference to the slow current of the water. The Laber got its nickname “black” because of its low gradient, which is why it often flows very slowly and its water appears dark.
The Black Laber rises from a karst spring northeast of Neumarkt in der Oberpfalz in Laaber, a district of Pilsach on the European Main Watershed. The Black Laber only freezes over in particularly harsh winters because it is fed by underground karst springs; the spring water has a temperature of 8 to 10 °C all year round.
From the source to the mouth the height difference is 184 m with an average gradient of 2.4 percent. On its way, the Black Laber passes or passes through the towns of Parsberg, Beratzhausen, Laaber Deuerling Eichhofen, Schönhofen, Sinzing and Bruckdorf before it flows into the Danube near Alling after 77.2 km.
Source: Wikipedia