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The concept of green infrastructure is about creating infrastructure that mimics, restores or maintains natural hydrology.  Green infrastructure includes 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 neighborhood-specific practices, such as bioretention, trees, green roofs, permeable pavements and cisterns
 
The concept of green infrastructure is about creating infrastructure that mimics, restores or maintains natural hydrology.  Green infrastructure includes 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 neighborhood-specific practices, such as bioretention, trees, green roofs, permeable pavements and cisterns
  
In other words, the idea is to improve and maintain water quality by using less concrete and pipes and more native landscaping to achieve good water quality.   
+
In other words, the idea is to improve and maintain water quality by using less concrete / pipes and more native landscaping to achieve good water quality.   
  
 
===Background===
 
===Background===

Revision as of 19:40, 13 September 2016

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.


Green Infrastructure

The concept of green infrastructure is about creating infrastructure that mimics, restores or maintains natural hydrology. Green infrastructure includes 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 neighborhood-specific practices, such as bioretention, trees, green roofs, permeable pavements and cisterns

In other words, the idea is to improve and maintain water quality by using less concrete / pipes and more native landscaping to achieve good water quality.

Background

Water is continually on the move on, above and below the surface of the earth. This movement is called the water cycle (AKA: hydrological cycle or H2O cycle). The water moves by the physical processes of evaporation, condensation, precipitation, infiltration, surface runoff, and subsurface flow. In doing so, the water goes through different phases: liquid, solid (ice) and vapor. To talk about the water cycle is to talk about:

  • The state of the water - liquid, solid (frozen) or gas (vapor)
  • where it is relative to the surface of the earth - below (ground water), on (surface water), above (humidity)
  • location (city , state, country, named ocean, etc.)

The total amount of water on earth is considered to have been more or less constant for hundreds of millions of years. What is not constant is the amount of water that is liquid, gas or solid that is below, on or above the surface at a particular location. Again in plain language less ice means more liquid water (higher sea levels) and more humidity. Pumping out groundwater means more surface water and / or more humidity.

Water is an excellent solvent. The list of things that will dissolve in water is very long. Even many things that don't dissolve in water will suspend in water. Water quality is about what is suspended or dissolved in the water. and what concentration of that is. Additionally water quality is about the temperature of the water. Water is requirement for all known living organisms. The trick is to support life the water has to be of a certain range quality. I fish needs some oxygen to be dissolved in the water to survive. Thousands of species of fish live in the oceans but humans cannot survive drinking ocean water because of the saline. To be meaningful when we talk about water quality we refer to the water quality supporting various uses of the water.


This portal has links to numerous articles relating to various aspects of using natural hydraulic methods to preserve and restore good water quality. In other words, this portal is about providing information about the use of green infrastructure.

Conceptually Green Infrastructure is about using nature and engineering to mimic the effects of natural hydrology.

Introduction to pre-development hydrology

Introduction to Water quality

Resources

Green infrastructure: Back to basics


Green infrastructure - wikipedia

What is Green Infrastructure? - EPA

Green Infrastructure - Using natural systems to meet environmental challenges in urban, rural and coastal settings

Green Infrastructure Primer

Stormwater management: Low-impact development and green infrastructure


Blue-Green Cities

BlueGreenCities

Blue Green Dream

Sustainable Drain

Stormwater Australia

Save the rain

Professional Practice - Green Infrastructure - American Society of Landscape Architects

Sustainable drainage system

Green Infrastructure - City of Portland Oregon


Green Infrastructure and Climate Change: Collaborating to Improve Community Resiliency

Green Infrastructure, The Conservation Fund



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.


'GI and health benefits:'

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


'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