Surface rainwater runoff © Atelier Dreiseitl

Hollow roads


  • Length: Variable
  • Depth: Variable
  • Slope: Variable
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Hollow roads or sunken channels can hold and drain much more water than gutters. Slopes are often less of an obstacle for covering distances greater than the 50 metres mentioned above because the distance to buildings is often greater, and therefore the channel level can be varied. But bikes, cars, etc. also use these channels when it rains; this can be a nuisance due to splashing water. For this and other reasons sunken channels are not applicable in all situations.


Section scheme © atelier GROENBLAUW, Marlies van der Linden