Green infrastructure is all of the elements of the natural environment
that influence and support human communities – urban, suburban and
rural. These elements include wetlands, surface and ground water,
forests and native landscapes, urban streetscapes, parks and open
space.
Incorporating consideration of green infrastructure into the
comprehensive planning process for land use, traditional grey
infrastructure (transportation and utility systems), and agricultural
preservation, can produce benefits related to:
Stormwater management and flood reduction
- Surface and ground water quality
- Air quality
- Wildlife habitat and protection of threatened and endangered species
- Quality and accessibility of open space and recreation
- Reduction of vehicle miles of travel through incorporation of bicycle and pedestrian trails within green corridors
- Enhancement of the function and quality of natural ecosystems
- Preservation of prime farmland and rural character
- Esthetic character and identity of the built environment
- Climate moderation
The specific elements
and functions of green infrastructure will vary as the scale of
planning shifts from a specific site, to a municipality, a region, a
state or a continent.
Green Planning
The growing interest in sustainability and green planning is sometimes
dismissed as just the current hot topic in planning or just good
planning. However, I believe the interest reflects a fundamental need
to expand the breadth and depth of consideration given to
environmental resources and elements at all levels of planning.
When I use the term green planning, I am referring to the planning and
design of the built environment in a manner which harmoniously
connects and relates all relevant human, natural, and man-made
components. The human environment includes personal, social, cultural,
political, and economic aspects. The natural environment includes the
character of the landscape, natural resources, and ecosystems. The
man-made or built environment includes structures, machines, and
utility systems.
My view is that the unique role of planners is to take a broad and
long term view of all relevant factors and to balance competing
demands of the human, natural, and man made elements of the
environment in their plans. For instance, planning must balance: short
and long term objectives; private property rights, and public needs;
and, ideal and more cost effective and politically acceptable
alternatives. The role of the planner should not be subverted or
dominated by any one factor, any one audience, nor an oversimplified
“silver bullet” answer.
Put another way, green planning is good planning with a greater
consideration of natural environmental elements during every phase of
plan development. This goes beyond: permitting requirements relative
to stormwater and wetlands; energy saving buildings; and, best
management practices for site engineering and grey infrastructure.
Green planning sees the big picture and should strive for each
planning decision to contribute to more environmentally sensitive and
sustainable projects.
Planning Roles
There is a need for planning education and career paths for those
whose focus and specialty is sustainability, at various scales,
considering: carbon footprints; reduction of green house gasses;
energy conservation; alternative energy systems; storm water
management and waste water treatment; sustainable agriculture; and
preservation of unique ecosystems and landscapes. There is also a need
for educational programs for persons in communication where they focus
on public awareness of the relationship between individual actions and
life styles and social consequences relative to environmental
sustainability and public decision making. However, we should not lose
sight of a critical role played by planners in dealing with land use
and development at the local level. Land use and development is the
meat and potatoes of what the planning profession deals with but
planners must understand and integrate the contribution from other
professionals -- engineers, architects, landscape architects and
ecologists.
Key Principles
I believe there are fundamental principles related to land use and
development that will lead to more sustainable and nourishing human
communities. These include:
- Balance jobs and
housing
- Create multi-modal
transportation opportunities and implement a functional
classification system for roadways
- Reduce and filter
stormwater run-off and recharge aquifers
- Implement a
comprehensive green infrastructure network by planting trees and by
preserving prime farm land, natural and cultural resources and open
space
- Implement
efficient mixed use land use patterns in proximity to municipal
services and facilities, relating housing to daily needs within
walking distance
The degree to which
we become more aware and capable of following these principles is
important. No one has a computer model that will balance the many
factors faced by a planner in a real world situation and yield a
project that satisfies perfectly all of the competing objectives. What
is needed are principles and processes that assist planners and
related disciplines to connect all relevant factors and identify a
balance among them that best accomplishes the objective of planning
noted above.
Tools and
Guidance
The American Planning Association’s
(APA) “National Infrastructure Investment Task Force and its
initiative,
Rebuilding America, is working to engage members, APA components,
and its allies and partners in a national conversation about how to
address our infrastructure crisis and increase investment in building
communities of lasting value”1. In 2008-2009, the Task
Force held workshops nationwide to examine infrastructure issues and
to make recommendations on policies and capital investments for the
United States. After the Task Force had been in operation for
approximately one year, APA created 6 infrastructure subcommittees,
one of which was designated to address the concept of green
infrastructure (this subcommittee is composed of 28 members including
this author). The report is intended to provide valuable tools and
policy guidance for planners in their own organizations and in dealing
with state and federal legislative initiatives. The report is
structured to address green infrastructure by scale of planning area
from the international level down to individual projects and sites.
Those interested in more information will find the following topics
covered in the Green Infrastructure Subcommittee’s report (draft
report is scheduled to be completed summer 2010):
-
Current conditions
and practices
- Benefits and
beneficiaries
- Policy
recommendations
- References
APA will be holding a
series of town hall meetings throughout the country during 2010 and
2011 “to engage local leaders and highlight needed policy changes”2.
If you are interested in environmentally based planning and context
sensitive design, see
www.planningconnections.com which also contains a description of the
book,
Planning Connections, by "Pete" Pointner.
1
American Planning Association National Infrastructure Investment Task
Force, “National Infrastructure Investment Task Force Status Report,”
(presented at the APA Board of Directors Board Meeting, April 25,
2009),
http://www.planning.org/policy/infrastructure/pdf/taskforceupdate.pdf
(accessed May 10, 2010).
2 American Planning Association, “Infrastructure”, American
Planning Association,
http://www.planning.org/policy/infrastructure/