Nature Based Solutions - Implementation Models Database

Pioneer Case

Flood retention basins of Lura river – Milan

A short description of the NBS project

Milan’s metropolitan region is affected by severe flooding during heavy rain events because of the high sealing rate of urban areas and increasing effects of climate change. Among several measures planned by the regional government there is a wide retention area that has been planned as flood control device, which also creates high quality natural areas and reconnects slow-mobility routes and recreational spaces inside the Lura Valley park. The project consists of the implementation of two rolling basins connected by an open air ditch and a pond filled with ground water. The basins will be temporarely flooded by Lura river during intense rainy periods through natural inlet from the river bed, whilst the pond will recharge constantly the ditch to maintain wetland vegetation all over the year to guarantee its phytodepuration functions. The balance of ground movements within the project is null as the volumes excavated are reused to create mounds and dikes. Wide areas of the river banks and plains have been upgraded through afforestation with native species. The objective of the intervention is to renature and stabilize river banks through live staking and vegetated dikes, riparian afforestation, phytodepuration basins, zero-energy flood retention system (no pumping needed).

NBS Implementation context
Location Italy, Milan
Latitude 45.6967
Longitude 9.03427
Status Project delivered
Dates 2017.0
Description of the NBS
NBS Scale city
NBS Impacts scale regional
Urban density/ Soil consumption low (suburb at the limit with rural areas, etc.)
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
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;
Stakeholder and Governance
Who Started this initiative? A public institution, a regional organization
Contracting Authority Consorzio Parco del Lura
Project manager (leader and main partners): entities names, and know-how involved Leader: Etatec - Studio Paoletti Main partners: Land Italia
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?) NGOs, Local Entities
OPTIONAL Considering the actual impacts, who are the primary beneficiaries of the project. Citizens
Cluster Governance Model Description
Global Estimated cost of the project more than 5M€
Cluster cluster1_public_financing
Description of the financing mechanism
Business Model
Class Type Description
TechnologicalSubstitute with renewables and natural processes
Temporal Factor
Expected time for the NBS to be fully effective after its implementation short (immediately to few months)
Expected life time of the intervention more than 30
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_driversAwarenessNBS_ambassadorsThe process benefit from the existing knowledge (from all the stakeholders) regarding NbS in cities and it was possible to generate the missing knowledge
Process Inhibitors
Class Subclass Type Description
Knowledge_barriersUncertaintyPerformance_unknowThe process suffer from the concerns of some of the stakeholders regarding the unknown consequences
What makes this project a pioneer?
Field Design_or_techniques_employed
Brief description of the innovativeness Pilot project of wetland (reduction of hydraulic risk integrated with 1)
Has the project received a prize, an award?
Has the project received a media coverage? (in reviews, in press, etc.)
IM Keywords
  • constructed wetland

  • floold management

Websites of conceptors: