Knud Erik Hilding-Hamann

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The Market Development Fund, together with the City of Copenhagen, HOFOR A/S, Taarnby Municipality and Taarnby Supply Wastewater A/S signed parallel agreements with a number of suppliers for the development of new, innovative solutions for local handling of rainwater in densely populated areas with high discharge levels.

The goal is to convey water from roofs to a chosen recipient for recycling, for recreational purposes, or for groundwater recharge, in order to avoid:

  • Water from the roofs contributing to flooding of the area
  • Water from the roofs having to pass through sewage treatment plants
  • Pipes being laid in streets and sidewalks
  • A higher costs for power supply, pumps, operation, and maintenance in order to handle the water

The proposed design consists of a self-supporting structure: a flexible conduit without joints is established as a cantilever construction stretching from the gutter to the recipient.

The top end of the tube is born by a stabilizing pillar. The lower end of the water tube is attached to an embedded concrete block, from which the water is routed to the recipient. The solution can handle rainwater up to a 100-year flood.