Main channel
Hauptkanal is the name and part of the name of watercourses:
- Main canal , left main strand upper course of the Brautlach (to Sandrach ) to Brautlach , Karlskron community, Neuburg-Schrobenhausen district, Bavaria
- Main canal (Eiter) , left tributary of the Eiter (to the Weser) near Bruchhausen-Vilsen , Diepholz district, Lower Saxony
- Main canal (Laillinger Bach) , right tributary of the Laillinger Bach (to Längenmühlbach ) to Lailling , Otzing municipality, Deggendorf district, Bavaria; Section name sequence Oberndorfer Graben → Reutgraben → Hauptkanal
- Main Canal Sterkrade , left tributary of the Handbach , district of Schwarze Heide, Oberhausen district, North Rhine-Westphalia
- Main Canal in Zala County, Hungary, alternative name of the Principal Canal .
- Turkmen main canal in Turkmenistan, abandoned in the planning stage in favor of the Karakum canal, see Karakum canal # Differentiation from the Turkmen main canal