Nature Based Solutions - Implementation Models Database

Implementation model

Cloudburst Management Plan in Copenhagen

A short description of the NBS project

In 2012, to combat the impacts of cloudbursts, the City of Copenhagen developed a Cloudburst Management Plan outlining priorities and measures recommended for climate adaptation (including extreme rainfall). In particular, the Cloudburst Management Plan consists of 4 surface solutions as well as pipe-based solutions, including stormwater roads and pipes that transport water towards lakes and the harbour; detention roads for storing waters; detention areas to store very large volume of waters (i.e. parks that could turn into lakes during flood events); green roads to detain and hold back water in smaller side streets. 300 projects are planned and the City will decide once a year which projects will be undertaken through a prioritisation selection: it is estimated that around 15 projects a year will be carried out in the next 20-30 years. In addition to the prioritisation of projects in terms of importance for flood prevention, a socio-economic assessment was undertaken. The assessment found that while both the traditional sewer solution and the alternative solution meet the municipality’s objectives concerning stormwater and cloudbursts, the alternative solution results in higher net benefits. The traditional sewer solution has been estimated to cost DKK 20 billion compared to the DKK 13 billion of the alternative solution. Both solutions would reduce the costs of damage by DKK 16 billion; thus, the net gain of the alternative solution is DKK 3 billion compared to the net loss of the traditional solution of DKK 4 billion.

NBS Implementation context
Location Denmark, Copenhagen (Denmark)
Latitude
Longitude
Status Ongoing (since 2012)
Dates
Description of the NBS
NBS Scale object (building, etc.)
NBS Impacts scale • Neighbourhood • City
Urban density/ Soil consumption High (dense city center)
Combined with other(s) environmental friendly solution(s)?
if other
NBS Typology
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NBS Uban Challenges
Climate Issues Climate mitigation
Climate adaptation
Other 0
Urban water management and quality Urban water management and quality
Flood management
Other 0
Air Quality Air quality at district/city scale
Air quality locally
Other 0
Urban Space and Biodiversity Biodiversity
Urban space design
Urban space management
Other 0
Urban Regeneration and Soil Air quality at district/city scale
Other 0
Resource efficiency Food, energy and water
Raw materials
Waste
Recycling
Other 0
Public health and well-being Acustic
Quality of life
Health
Other 0
Environmental justice and social cohesion Environmental Justice: Recognition
Environmental Justice: Procedural Justice
Environmental Justice: Distributional Justice
Environmental Justice: Capabilities
Environmental Justice: Responsibility
Social Cohesion
Other 0
Urban planning and governance Urban planning and form
Governance in planning
Other 0
People Security Control of crimes
Control of extraordinary events
Other 0
Green economy Circular economy
Bioeconomy activities
Direct economic value of NBS
Other 0
Other
Stakeholder and Governance
Who Started this initiative? Governments • Local government/municipality (the City of Copenhagen)
Contracting Authority
Project manager (leader and main partners): entities names, and know-how involved
Who (else) was involved in the project ? (Inhabitants, local association, etc.)
More detail on the process and the role of the different stakeholders (How did it happen?)
OPTIONAL Considering the actual impacts, who are the primary beneficiaries of the project.
Cluster Governance Model Description
cluster1_traditional_public_administrationClosed_governanceThe climate adaptive initiatives in Copenhagen are financed by a combination of public and private investments. Private homeowners, on one hand, and the City Administration and the utility company (Københavns Energi) via taxes and revenues from charges, on the other. The city of Copenhagen, the Capital Area Supply Company (HOFOR) and private land owners will share the total costs of around € 1.5 billion. Water charges will finance the part of the solutions concerned with water management. The city can save money if it coordinates the implementation of the cloudburst and stormwater management with other construction projects. The combined solutions also require private individuals to invest in anti-flood backflow valves and local stormwater drainage.
Financing
Global Estimated cost of the project € 1.5 billion
Cluster cluster4_public_private
FM PUBLIC-PRIVATE
Description of the financing mechanism The climate adaptive initiatives in Copenhagen are financed by a combination of public and private investments. Private homeowners, on one hand, and the City Administration and the utility company (Københavns Energi) via taxes and revenues from charges, on the other. The city of Copenhagen, the Capital Area Supply Company (HOFOR) and private land owners will share the total costs of around € 1.5 billion. Water charges will finance the part of the solutions concerned with water management. The city can save money if it coordinates the implementation of the cloudburst and stormwater management with other construction projects. The combined solutions also require private individuals to invest in anti-flood backflow valves and local stormwater drainage.
Business Model
Class Type Description
-
Temporal Factor
Expected time for the NBS to be fully effective after its implementation
Expected life time of the intervention
Already feedbacks on the project? In case, the project has already been adapted to new requisites, please explain the modifications brought
Success and limiting factors
Process Enablers
Class Subclass Type Description
Knowledge_drivers Awareness • Climate Change A number of challenges to implementing the projects in the Cloudburst Management Plan have been identified: • Projects will need to be carried out on private roads. 132 km of private roads (around 30%) have been included in the plan, and road-owners can decide whether projects will be implemented. It may be necessary to purchase roads considered crucial to the management (currently 9km of roads have been identified). • The plan may impact conservation goals. An initial analysis of the environmental impact of the plan has taken place and there is a possibility to get exemptions from the Conservation Board in a couple areas. • The prioritisation of the projects emphasizes large-scale projects, which will require cooperation between municipalities and also private land owners. • Stormwater will need to be treated to ensure a proper water quality; solutions are being tested.
Governance_driversProcess efficiencies Co-creation and participation • Collaboration; • Involvement of urban government • Co-production
Economy_drivers--
Process Inhibitors
Class Subclass Type Description
Knowledge_driversUncertainty • Operational unknown
Governance_drivers-
Economy_drivers Budget constraints
What makes this project a pioneer?
Field
Criteria
Brief description of the innovativeness
Has the project received a prize, an award?
Has the project received a media coverage? (in reviews, in press, etc.)
IM Keywords
References