(unnamed)

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(unnamed) flows into Senne - Zenne , which it joins at N 50° 49′ 15″, E 4° 18′ 15″ at OSM node n388044843, and there 209 km of total upstream flows in. load it's distributaries

(unnamed) has 2 tributaries.

• Neerpedebeek, which joins it at N 50° 49′ 13″, E 4° 18′ 7″ at OSM node n34829551, and 34 km of total upstream flows in.
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• Déversoir d'Aa - Aa Overlaat, which joins it at N 50° 49′ 12″, E 4° 18′ 7″ at OSM node n10611465738, and 74 m of total upstream flows in.
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