Nature-based Solutions: Partnering with the Environment

Key Messages chapter 9 NbS
» Working with nature as an ally, instead of against it, is at the core of
nature-based solutions (NbS) for resilient infrastructure. No strict
boundary defines what constitutes NbS for infrastructure resilience.
Most NbS for infrastructure resilience are hybrid. Hybrid solutions that
combine grey, green, and blue approaches help maximize resilience
against climate and disaster risks by merging the predictability and
protective capacity of engineered solutions with the adaptability,
regenerative qualities, and co-benefits of natural systems.
» Policy and governance frameworks set the ‘rules of the game’ for
infrastructure agencies, determining whether NbS moves from pilot
to mainstream infrastructure practice. Embedding NbS into master
plans, sectoral strategies, and concession agreements ensures they are
considered from the outset of infrastructure planning, not as optional
add-ons.
» To institutionalize the implementation of NbS at scale, infrastructure
agencies must utilize integrated cost–benefit tools, update procurement
guidelines, and standardize technical guidance and design manuals.
» The availability of financial resources and well-designed instruments is
indispensable to scaling the use of NbS. Instruments such as blended
finance, PPPs, and performance-based contracts align incentives for both
public and private actors.
» In order to bring NbS into the mainstream, infrastructure agencies will
have to acquire technical expertise in ecology and related subjects
alongside traditional engineering. In addition, developing effective NbS
involves engagement across sectors (water, transport, environment, and
disaster risk management) and actors, including local communities and
indigenous groups.
» There are significant cost differences between grey resilience solutions
and NbS. Often, NbS have lower capital expenditure requirements.
However, maintenance and rehabilitation of NbS require different
institutional arrangements than grey resilience solutions. Additional
benefits, from air quality to recreational uses, can make NbS even more
attractive for the resilience of infrastructure.
» Continuous public education and engagement are crucial for maintaining
and monitoring NbS. In many cases, clear agreements are necessary
to compensate communities for the maintenance and upkeep of NbS
on their lands. Avoiding gentrification and adverse social impacts is
paramount for the success of NbS for resilience