m
Line 99: Line 99:
  
 
===Sustainable communities===
 
===Sustainable communities===
net energy balance, net pollutant balance, net water balance,  
+
Sustainable communities are places that balance their economic assets, natural resources, and social priorities so that residents' diverse needs can be met now and in the future. 
 +
 
 +
Communities want to protect their water quality while also getting the greatest possible benefit out of every investment they make.  Many are conserving, restoring, or enhancing natural areas while incorporating green infrastructure practices, such as trees, rain gardens, green roofs and other practices.  These green infrastructure practices mimic natural systems into developed areas to manage rainwater where it falls.  Green infrastructure practices are an integral component of sustainable communities because they can help communities protect the environment and human health while providing other social and economic benefits, allowing communities to achieve more for their money.  Using green infrastructure practices strategies to reduce stormwater runoff can strengthen efforts to preserve open space and natural areas and encourage development in existing communities.  These practices help make neighborhood streets and greenways pleasant and safe for walking and biking and reinforce a sense of place.  Integrating green infrastructure and sustainable communities encourages collaboration in development decision and promotes green building practices.   
 +
 
 +
Sustainable communities that fully integrate green infrastructure approaches use community design to help simultaneously achieve environmental, economic, and social goals.  These goals include improving water quality, revitalizing neighborhoods, reducing flood risk, and providing recreational areas that encourage physical activity.  Community planners can enhance these and other benefits by selecting the types and locations of green infrastructure practices that best support their goals. 
 +
 
 +
To learn more about sustainable communities and green infrastructure, including how to develop a Sustainable Communities and Green Infrastructure Plan, read the EPA's report on [https://www.epa.gov/sites/production/files/2016-08/documents/green-infrastructure.pdf Enhancing Sustainable Communities with Green Infrastructure].
 +
 
 
===Living (green) streets===
 
===Living (green) streets===
 
===Climate adaptation===
 
===Climate adaptation===

Revision as of 16:08, 19 July 2017

Warning: This page is an edit and testing page use by the wiki authors. It is not a content page for the Manual. Information on this page may not be accurate and should not be used as guidance in managing stormwater.

Proposed portal for Green Infrastructure

  • Overview of green infrastructure
  • Stormwater management and green infrastructure
  • Non-stormwater benefits of green infrastructure
  • Benefit-costs of green infrastructure stormwater management
  • Case studies and integrated stormwater management using green infrastructure
  • Green Infrastructure resources
  • Links


Stormwater management and green infrastructure

While green infrastructure is a concept that includes multiple strategies and has a variety of impacts, perhaps the most important component of green infrastructure is water management. Water management includes reduction in peak discharges in rivers, reductions in pollutant loading to surface waters, groundwater recharge, and reduced use of water. Historically, urban stormwater runoff has been considered a liability. Management strategies focused on removing runoff through a highly connected system of pavement and pipes. Constructed ponds and constructed and natural wetlands were used to filter the water and delay and lessen the peak discharge. Studies eventually showed that this pipe and pond system was only marginally effective and did not adequately prevent flooding and pollutant loading of receiving waters.

Over the past two decades there has been increasing emphasis on retaining stormwater runoff near the point where precipitation falls. This has been accomplished through a variety of infiltration practices. These practices, when properly designed, constructed, and maintained have proven to be effective in reducing pollutant loads and stormwater runoff volumes. However, initial designs often did not consider additional benefits that could be realized with these practices, such as carbon sequestration, habitat development, and aesthetics.

This page provides a detailed discussion of the relationship between stormwater management and green infrastructure, including a discussion of stromwater practices, integrated stormwater management, and design for multiple benefits.

Principles of retaining and infiltrating water

Practices

Integrated stormwater management

Stormwater design

Benefits of green infrastructure and role of green infrastructure in sustainability and ecosystem services

Human activities can negatively impact hydrologic and chemical cycles, pollute air and water, degrade soil, and reduce biodiversity. Failure to maintain basic ecosystem functions places humans at risk because of our dependence on these functions. As human populations and resource consumption increase, it becomes even more important to preserve basic ecosystem functions. Sustainability is the principle and practice of creating and maintaining the conditions under which humans and nature can exist in productive harmony to support present and future generations. Green infrastructure is one tool or approach to creating sustainable urban environments.

What are ecosystem services?

This picture shows a cistern located at Mississippi Watershed Management Organization
Harvesting rain water and using it to grow vegetation is an example of a provisioning service, with water being the product obtained. Photo by MWMO Staff. To enlarge,click on image.

The natural environment provides basic services required for humans and all life to survive. These ecosystem services can be divided into four basic categories or types.

  • Supporting services are basic services needed to support all other ecosystem services. An example is primary production, which is the production of organic compounds from carbon dioxide. Plants and algae are largely responsible for primary production. Other examples of supporting services are nutrient cycling and soil formation. These services provide basic materials needed by organisms.
  • Provisioning services are products obtained from ecosystems, such as food, minerals, lumber, energy, medicines, and water. It is these services that humans typically rely on for economic purposes and to improve quality of life. The concern is that in utilizing provisioning services we degrade other services.
  • Regulating services ensure the continued availability of other ecosystem services. Examples include purification of air and water, waste composition, and climate regulation. Humans often stress these systems. for example, introducing too much phosphorus into a lake impairs the ability of the lake to regulate the growth of algae.
  • Cultural services are unique to humans. Though not essential to survival, they are important for human well-being and development. Examples include the use of ecosystems for recreation, scientific development, and education.

Numerous studies attempt to place a dollar value on ecosystem services, though the value of these services is infinite in the sense that human survival depends on them. Costanza et al. (2014) place an annual value of 125 to 145 trillion dollars on ecosystem services, which is more than double the global GDP. The authors also estimate an annual loss of 4.3 to 20.2 trillion dollars, underscoring the negative impact humans are having on basic ecosystem functions necessary for our well-being.

Sustainability

image of target center green roof, Minneapolis, MN
Vegetation on the Target Center Arena green roof. Vegetation consisted of a pregrown Sedum mat supplemented with 22 species of plugs and 16 species of seed native to Minnesota’s bedrock bluff prairies. Image Courtesy of The Kestrel Design Group, Inc.

A central tenet of sustainability is that we must preserve ecosystem services necessary for humans to survive and prosper. In 1987, a World Commission on Environment and Development report (UN, 1987) defined sustainable development as "development that meets the needs of the present without compromising the ability of future generations to meet their own needs".

A challenge is incorporating basic sustainability concepts into social and economic systems. These systems historically have not placed proper value on ecosystem services, resulting in the degradation of these services. For example, stormwater in urban areas was traditionally viewed as something that negatively impacted humans, primarily through flooding. Traditional stormwater systems were designed to discharge stormwater to the nearest receiving water as quickly as possibly. The result was a dramatic change in urban hydrology, increased flooding downstream, reduced water quality, and loss of habitat. Sustainability stresses using stormwater as a resource. Using stormwater as a resource restores some natural resource function and provides economic and social benefit. Sustainable practices achieve a balance between environmental, social, and economic factors.

Relationship of green infrastructure to ecosystem services and sustainability

Green infrastructure is an approach to managing urban wet weather impacts that mimics, restores, or maintains natural hydrology. Green infrastructure includes a wide array of practices, including infiltrating, evapotranspiring, or harvesting and using stormwater. On a regional scale, green infrastructure is the preservation or restoration of natural landscape features, such as forests, floodplains and wetlands. On the local scale, green infrastructure consists of site and neighborhood-specific practices, such as bioretention, trees, green roofs, permeable pavements and cisterns. Regional and local practices are coupled with policies such as infill and redevelopment that reduce overall imperviousness in a watershed.

Green infrastructure is an important component of sustainable urban communities. Green infrastructure helps maintain ecosystem services in the following ways.

  • Air quality regulation: Potential of ecosystems to capture and remove air pollutants in the lower atmosphere.
  • Erosion protection: Potential of ecosystems to retain soil and to prevent erosion and landslides.
  • Water flow regulation: Influence ecosystems have on the timing and magnitude of water runoff and aquifer recharge, particularly in terms of water storage potential.
  • Pollination: Potential of animal vectors (bees being the dominant taxon) to transport pollen between flower parts
  • Maintenance of soil structure and quality: The role ecosystems play in sustaining the soil's biological activity, physical structure, composition, diversity and productivity.
  • Water purification: The role of biota in biochemical and physicochemical processes involved in the removal of wastes and pollutants from the aquatic environment
  • Climate regulation: The influence ecosystems have on global climate by regulating greenhouse and climate active gases (notably carbon dioxide) from the atmosphere.

The following section provides detailed information on each of these.

References for this section

Environmental benefits of green infrastructure

An increasing focus on Green Infrastructure has brought an awareness that stormwater management can provide numerous benefits beyond improving water quality and urban hydrology. Trees, for example, provide a multitude of benefits beyond stormwater management, as discussed in this article. In particular, vegetated stormwater best management practices (BMPs), including tree-based systems and other bioretention systems, offer opportunities to achieve multiple benefits, ranging from aesthetics (see, for example, this presentation by Dr. Steven Rodie from the University of Nebraska - Omaha) to ecosystem friendly designs.

Impact on pollinators

image
perennial garden photo
Rainfall from the roof on this house is routed to a perennial garden containing, among other plants, goldenrod, milkweed, and purple coneflower, all of which are considered pollinator-friendly plants.

It is clear that pollinators, both vertebrates and invertebrates, are in decline (see [1], [2], [3], [4], [5]). Vegetated stormwater BMPs can be designed to be pollinator-friendly. The following sections provide numerous links to information that can be used in designing and implementing pollinator-friendly stormwater BMPs.

Pollinator friendly plants

Pollinator friendly practices

Although much of the information on these pages is general, many of the practices can be incorporated into vegetated stormwater BMPs.

Case studies

Other links

Carbon sequestration

Carbon sequestration is the capture and long-term storage of carbon from atmospheric carbon dioxide. Carbon sequestration is often discussed in the context of climate mitigation, but there are numerous benefits to increased carbon (organic matter) content in soils, including improved soil structure, infiltration through soil, nutrient retention and cycling, and pollutant attenuation.

The primary mechanism of carbon sequestration is through enhanced vegetative growth.

Maintaining ecosystem functions

pollination, carbon storage, hydrology, pollutant management

Enhanced biodiversity

diverse habitats, diverse gene pool


Sustainable communities

Sustainable communities are places that balance their economic assets, natural resources, and social priorities so that residents' diverse needs can be met now and in the future.

Communities want to protect their water quality while also getting the greatest possible benefit out of every investment they make. Many are conserving, restoring, or enhancing natural areas while incorporating green infrastructure practices, such as trees, rain gardens, green roofs and other practices. These green infrastructure practices mimic natural systems into developed areas to manage rainwater where it falls. Green infrastructure practices are an integral component of sustainable communities because they can help communities protect the environment and human health while providing other social and economic benefits, allowing communities to achieve more for their money. Using green infrastructure practices strategies to reduce stormwater runoff can strengthen efforts to preserve open space and natural areas and encourage development in existing communities. These practices help make neighborhood streets and greenways pleasant and safe for walking and biking and reinforce a sense of place. Integrating green infrastructure and sustainable communities encourages collaboration in development decision and promotes green building practices.

Sustainable communities that fully integrate green infrastructure approaches use community design to help simultaneously achieve environmental, economic, and social goals. These goals include improving water quality, revitalizing neighborhoods, reducing flood risk, and providing recreational areas that encourage physical activity. Community planners can enhance these and other benefits by selecting the types and locations of green infrastructure practices that best support their goals.

To learn more about sustainable communities and green infrastructure, including how to develop a Sustainable Communities and Green Infrastructure Plan, read the EPA's report on Enhancing Sustainable Communities with Green Infrastructure.

Living (green) streets

Climate adaptation

carbon storage,

References

Costanza, Robert, Rudolf de Groot, Paul Sutton, Sander van der Ploeg, Sharolyn J. Anderson, Ida Kubiszewski, Stephen Farber, and R. Kerry Turner. 2014. Changes in the global value of ecosystem services. Global Environmental Change. 26:152-158.

Benefit-costs of green infrastructure stormwater management

Case studies and integrated stormwater management using green infrastructure

Green Infrastructure resources



Anne G. thoughts for Green Infrastructure Web Page in Stormwater Manual

Include:


'Definition of GI:' this is what’s in the manual now:

green infrastructure -means a wide array of practices at multiple scales that manage wet weather and that maintains or restores natural hydrology by infiltrating, evapotranspiring, or harvesting and using stormwater. On a regional scale, green infrastructure is the preservation or restoration of natural landscape features, such as forests, floodplains and wetlands, coupled with policies such as infill and redevelopment that reduce overall imperviousness in a watershed. On the local scale, green infrastructure consists of site and and neighborhood-specific practices, such as bioretention, trees, green roofs, permeable pavements and cisterns

Notice all the green call-out boxes for green infrastructure.

'GI BMP’s: '

  • Permeable pavement (link to page)
  • Green roofs (link to page)
  • Harvest and Use (link to page)
  • Trees (link to page)
  • Bioretention (link to page)
  • Infiltration


'GI and Climate Change/Adaptation/Resiliency'

The MPCA’s Stormwater Program has been addressing the issues related to climate change adaptation since 2005 with the first issuance of the Minnesota Stormwater Manual. It advanced the concept of treating water on site, using low impact design, and volume control best management practices (BMPs). Since then, stormwater permits have advanced these BMPs, and MPCA has worked to set goals and quantify credits for using these BMPs through the Minimal Impact Design Standards (MIDS) Project. Consistent with MIDS are BMPs that can increase infiltration and reduce runoff (including green infrastructure like rain gardens, urban forestry/trees, pervious pavement, swales, etc.) Local units of government have traditionally worked to get water off the landscape as quickly as possible. In the last couple of decades, the MPCA has started addressing pollutant and rate control. We are now beginning to address volume control. Volume control, and working to mimic natural hydrology, helps to result in less dramatic runoff events, which reduces stream erosion and scouring. Impervious surfaces are increasing faster than population growth. This increase in impervious surface coupled with larger storm events will have a significant impact on receiving waters. Stormwater capture and reuse is an opportunity to reduce runoff and reap benefits from heavier rainfalls while reducing demands on the potable water supply.

NOAA Atlas 14 updates are being utilized to more accurately reflect precipitation intensities and durations. NOAA Atlas 14 incorporates 50 additional years of data into the estimate of precipitation 27 intensity and durations, and could account for changes that may be related to climate change. These estimates, used as an engineering standard, are vital to ensure proper design of culverts, storm sewers, and water quality devices.

In August 2013, the reissued Municipal Separate Storm Sewer System (MS4) General Permit became effective, which regulates stormwater discharge from counties, cities, townships and other publicly owned entities in urbanized areas. The goal of the MS4 program is to prevent or reduce the discharge of pollutants to stormwater, and ultimately, surface waters. This permit’s provisions will help to address problems of erosion and water pollution associated with heavy precipitation events.

Portfolio of green infrastructure in Minnesota (by region)

Green Infrastructure in schools

'GI and health benefits:'

'GI and sustainable communities:' EPA: Enhancing Communities with Green Infrastructure: https://www.epa.gov/smartgrowth/enhancing-sustainable-communities-green-infrastructure

'Green Streets and Living Streets. City of North St. Paul: http://www.ci.north-saint-paul.mn.us/vertical/sites/%7B5F63881B-2F96-4032-818C-7F4AD3529485%7D/uploads/%7BAF05CD7B-64EC-4FA8-A5BF-55F91637C22A%7D.PDF and City of Maplewood: http://maplewoodmn.gov/1014/Living-Streets


'For municipalities: '

Integrating GI : EPA: GI Opportunities that Arise During Municipal Operations: https://www.epa.gov/sites/production/files/2015-09/documents/green_infrastructure_roadshow.pdf Meet permit requirements with GI:


'GI Costs/Benefits'


GI and brownfield development:


'Link to other reports:' EQB

table test

Stabilization schedule must be no less than:
14 days for all exposed soils
7 days if a discharge point is within one mile of a special or impaired water
24 hours for areas within 200 ft of a public water during fish spawning times
24 hours for areas of ditches and swales within 200 ft of the property edge or surface water discharge point and 14 days for remainder

Privacy policy

Template:Footer

/* Manually replaced by abbott Aug 6 '21 */