Nature Based Solutions - Implementation Models Database

Structures for water management, Rain garden

Gomeznarro park

A short description of the NSB

As a result of its topography and impermeable ground surface, the Gomeznarro Park (10.000sqm) in Madrid has been affected by erosion during heavy rainfall events, and the surrounding residential areas suffered from flash flooding. In response to these problems, in 2003 complex works aiming at improving the natural drainage and rain water retention were carried out in the park. These included removal of impervious pavement and use of permeable surfaces, restoration of compacted soils, revegetation of the areas at risk of erosion and installation of underground rainwater collection system and storage tanks. These measures eliminated the problem of erosion and flash flooding in the area, reduced pressure on wastewater management system and established a more natural water cycle in the area. An additional benefit came from the increased moisture in the soil that also helps to ameliorate the Urban Heat Island effect in and around the park. In 2004, the project received a ‘good practice’ qualification as part of the best practice award scheme by the UN Habitat. The water infiltration and collection technology has been subsequently replicated in a number of projects in Madrid (e.g. green areas in Valdebebas development; Madrid Rio - M-30 motorway; sports areas Daoiz y Velarde and Marques de Samaranch; Alzheimer Centre Fundación Reina Sofia) and elsewhere in Spain (e.g. the shopping centre car-park in Autonomous Community of Galicia and a park in Urbanización Torré Baró in Barcelona).

NBS Implementation context
Location Madrid, Hortaleza District (Spain)
Status (from - to) Project delivered (January-March 2003)
NBS Scale Neighbourhood City
NBS Impacts scale Neighbourhood City
Urban density/ Soil consumption High (dense city center, etc.)
NBS Typology

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
Other 0
Public health and well-being Acustic
Quality of life
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
NBS Stakeholders & Governance

The project was driven and funded by the municipality of Madrid. The technology and consultancy for the intervention was provided by a private consultancy company. The park is surrounded by social housing built in the 1960s. Tenants’ complaints about the dampness in their houses caused by flash flooding provided an impulse for the housing association to refurbish the residential buildings. This process was integrated with the municipality’s plan and the revitalisation of the Gomeznarro Park.

Initial actors (Leaders) Governments Local government/municipality (Madrid municipality)
Involved actors Governments Local government/municipality (Madrid municipality),Market Private sector (Partner company: Atlantis Marketing Euro S.L)
Ecological scale Local scale green area
Governance model CLUSTER 1: Traditional public administration Hierarchical governance
NBS Financial aspects

The municipality of Madrid financed the project. The construction cost was €343.600 (approximately €34/sqm). Whilst the benefits have not been assessed in monetary terms, there are no additional maintenance costs in comparison to traditional landscaping solutions used in parks. The project resulted in reduced erosion, risk of flooding and pressure on the drainage systems. The park receives yearly about 5 million litres of rain water, which now does not enter the drainage system but instead recharges the groundwater levels and results in a lower need for additional watering by park maintenance. Further benefits include improved air quality and reduced air temperatures in and around the park.

Global (estimated) cost of the project 200k€- 1M€ (343.600€)
Financing mechanism CLUSTER 1: Public financing
NBS Business Models Archetype
Technological Maximize material productivity and energy efficiency Create value from waste
Social Encourage sufficiency
Organisational Re-purpose the business for society/environment Develop scale-up solutions
NBS Success and limiting factors
Process enablers
Knowledge Awareness Climate Change
Governance -
Economy De-risking Public de-risking strategies, Create conditions for new business models and finance schemes
Process inibitors
Knowledge Uncertainty Operational unknown Performance unknown, Technical inadequacy Lack of ready-to-apply scientific results, concepts and technologies
Governance Complexity of governance structure Role ambiguity
Economy -
IM Keywords
  • Hierarchical governance

  • Local scale green area

  • Public financing

  • Maximize material productivity and energy efficiency

  • Create value from waste

  • Encourage sufficiency

  • Re-purpose the business for society/environment

  • Develop scale-up solutions