Implementing Green Roof Implementing Green Roof Technology: An Integrative Approach Technology: An Integrative Approach

Towards Optimizing Social and Towards Optimizing Social and Ecological BenefitsEcological Benefits

Yanique BedwardCoosje HamminkMihai Hopirtean

Ole Johannsen Ariane Laporte-Bisquit

Susan ReesArielle Tozier de la Poterie

29 October 2010

Introduction to Green RoofsIntroduction to Green RoofsIntensive

Extensive

Central Research QuestionCentral Research QuestionHow can green roofs benefit or hinder the cause for sustainability in the Watergraafsmeer (Amsterdam) area, and what obstacles, opportunities and uncertainties face the current situation in terms of both policy and technical considerations?

Additionally, how can future research be best directed in order to fill knowledge gaps and to overcome the challenges of implementing and sustaining green roof proliferation in this area?

Chapter 2: What are the energy related Chapter 2: What are the energy related benefits of green roofs and for which green benefits of green roofs and for which green roof design are these benefits maximized? roof design are these benefits maximized?

Chapter 3: Combining Green Chapter 3: Combining Green Roofs & Solar TechnologyRoofs & Solar Technology

Chapter 4: The role of green roofs in Chapter 4: The role of green roofs in rainwater runoff management in urban rainwater runoff management in urban

areasareas• Optimal design for reducing runoff:

Deep substrate, rich in organic matter and mineralsDense and diverse vegetation coverPotential of blue roofs to reduce runoff? Integrating green roofs with other rainwater infrastructures?

• Water quality:Overall positive effect BUT risk of water pollution from fertilizers and nutrient enriched substrates

Chapter 5: Green Roofs, Chapter 5: Green Roofs, Biodiversity, & Urban Heat Biodiversity, & Urban Heat

IslandIslandIntensive green roofs have a higher potential for biodiversity conservation/creation

Proper management increases local pollinator diversity

Green roofs probably contribute in a positive way to green-space networks and therefore to the overall urban ecology/biodiversity

Green roofs can help to improve the air quality, reduce the “urban heat island effect”

Chapter 6: Market & Civil Chapter 6: Market & Civil Society StakeholdersSociety Stakeholders

Market and Civil Society Governance Arrangements

Obstacles and Opportunities

Little official policy, much market power

Utilize the power of market actors, official policy is necessary

Carrot and Stick

Chapter 7: Green Roofs and the Chapter 7: Green Roofs and the State: New Public ManagementState: New Public Management

• New Public Management

Market-based techniques

Downsize state

• Green Roofs

Government has steering function

Market-oriented incentives

Competition

Chapter 8: Policy Instruments Chapter 8: Policy Instruments & International Examples& International Examples

Examined policy instruments (theoretical) and how they are used around the world (practical)

Policy instruments

Direct financial incentives

Indirect financial incentives

Command & control

Case Studies: Germany & Toronto

No quick fixes

Main conclusion: Need local data on which to base policies

Outlined criteria on which policies could be evaluated

Integrated ConclusionsIntegrated Conclusions

Research Action PlanResearch Action PlanOverall Conclusion:

Need data

1) Experimental site to collect ecological, energy savings, and biodiversity data and to test combinations of different techonologies

2) Explore horizontal & vertical opportunities for coordination and cooperation between State, Market, Civil Society concerning green roofs

3) Using data from collecion sites, evaluate benefits and drawbacks of different policy instruments

Select appropriate policy instruments for Amsterdam based on criteria outlined in chapter 8