Heavy rainfall management concept for the districts of Amager and Christianshavn in Copenhagen

Italiensvej Perspektive © Dr. Antje Backhaus gruppe F

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Prinzipplan © Dr. Antje Backhaus gruppe F

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Idee zur Umgestaltung des Sundbyvesterplads in einen Stadtplatz mit Raum zur Rückhaltung großer Abflussmengen und Raum für Wasserspiel und Auftenthalt © Dr. Antje Backhaus gruppe F

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Amagerbanen Plan Ausschnitt Spielzug © Dr. Antje Backhaus gruppe F

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Italiensvej Schnitt bei Überflutung © Dr. Antje Backhaus gruppe F

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Italiensvej Schnitt bei Trockenheit © Dr. Antje Backhaus gruppe F

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Italiensvej Perspektive © Dr. Antje Backhaus gruppe F

Prinzipplan © Dr. Antje Backhaus gruppe F

Idee zur Umgestaltung des Sundbyvesterplads in einen Stadtplatz mit Raum zur Rückhaltung großer Abflussmengen und Raum für Wasserspiel und Auftenthalt © Dr. Antje Backhaus gruppe F

Amagerbanen Plan Ausschnitt Spielzug © Dr. Antje Backhaus gruppe F

Italiensvej Schnitt bei Überflutung © Dr. Antje Backhaus gruppe F

Italiensvej Schnitt bei Trockenheit © Dr. Antje Backhaus gruppe F

In collaboration with the Danish company EnviDan a/s, gruppe F developed a heavy rainfall management concept for the districts of Amager and Christianshavn in Copenhagen.
In Danish, the concept is called "Skybrudsplan". Directly translated, this means "cloudburst plan". After the city experienced a heavy cloudburst on July 2, 2011 with rain intensities of up to 30mm in 10 minutes, or 135mm in 24hrs, the focus of Danish climate adaptation is primarily on heavy rainfall management. Major damage to infrastructure and the health risk for the population are to be minimized in the future in the event of similar events. Concepts for dealing with cloudbursts have therefore been developed for all catchment areas of the city.

The catchment area worked on by gruppe F comprises the southern island of the capital "Amager" with the district "Christianshavn".
Based on an analysis of the topography and the model calculation of sinks and flow paths at a statistically calculated 100 annual rain event in the year 2100, a concept was developed that combines the local management of smaller rainfalls with the emergency management of cloudbursts. As a target, the city streets should be flooded up to a maximum of 10cm during the assumed rain event. At the same time, great emphasis was placed on the local anchoring of stormwater management measures via multicoding of areas and the coexistence of daily use and functionality as an emergency waterway.
On the one hand, the aim of the design concept was to create areas that can be flooded as retention areas during heavy rainfall events as well as paths that serve to drain floodwater to the sea. However, the drainage function of the green spaces is only recognised when it is needed. In everyday life, the attractively designed and easily usable open spaces are primarily intended to connect the city centre with the green spaces on the coast and to bring the special natural spaces on the Baltic Sea shore into the city.
Retention areas, as well as first, second and third order drainage ways, have been defined for the entire catchment area. Exemplary designs were developed for some of the defined spaces to show how the theoretical considerations can be implemented on site. As a follow-up to the concept development for heavy rainfall management in the entire urban area of Copenhagen, approximately 300 projects for heavy rainfall adaptation in the city are to be implemented over the next 20 years with a budget of around 1.5 billion euros.

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Planning offices

gruppe F | Freiraum für alle GmbH
Berlin

Project period
2013 - 2013

Size
ca. 30km²

Client
HOFOR - Hovedstadsområdets Forsyningsselskab

Als Kooperationspartner von EnviDan a/s

Address

Kopenhagen
Dänemark

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