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Sierra club environmental forum_05262010

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Sierra club environmental forum_05262010 Sierra club environmental forum_05262010 Presentation Transcript

  • GreenInfrastructure:An OverviewEnvironmental Forum05.26.2010 Atlantic States Legal Foundation, Inc. www.aslf.org
  • Atlantic States Legal Foundation, Inc. 05.26.2010 What Is Green Infrastructure? As A Planning Approach:Green infrastructure is an interconnected network of natural areas and other open spaces that conserves natural ecosystem values and functions, sustains clean air and water, and provides a wide array of benefits to people and wildlife
  • Atlantic States Legal Foundation, Inc. 05.26.2010 What Is Green Infrastructure? As A Stormwater Management ApproachGreen stormwater infrastructure refers to systems and practices that use or mimic natural processes to infiltrate, evapotranspirate, or reuse stormwater or runoff on the site where it is generated
  • Atlantic States Legal Foundation, Inc. 05.26.2010 What Is Green Infrastructure? Green Infrastructure Technologies  Green Roof  Tree Trench/Vegetated Swale  Planter Box  Rain Garden  Permeable Pavement  Urban Forestry  Rain Barrel and Cistern
  • Atlantic States Legal Foundation, Inc. 05.26.2010What makes green infrastructure sodifferent?And what can green infrastructuredo for us?
  • Atlantic States Legal Foundation, Inc. 05.26.2010Impervious Urban Surface Sidewalks Streets Parking Lots Rooftops
  • Atlantic States Legal Foundation, Inc. 05.26.2010The Difference  Pre-development  Post-development
  • Atlantic States Legal Foundation, Inc. 05.26.2010Traditional Approach to StormwaterManagement: move water off the site as quickly as possible
  • Atlantic States Legal Foundation, Inc. 05.26.2010Green Infrastructure Approach Treat stormwater runoff at the source where it is generated
  • Atlantic States Legal Foundation, Inc. 05.26.2010Rain Gardens typically allow for 30% more infiltration than a conventional lawn Effectively remove pollutants, >40% nitrogen Reduce runoff
  • Atlantic States Legal Foundation, Inc. 05.26.2010Green Roofs Can retain 30-80% of total annual precipitation falling on the surface Reduce air pollution Save energy cost Last up to twice as long as traditional roof
  • Atlantic States Legal Foundation, Inc. 05.26.2010Stormwater Planter Boxes Reduce stormwater volumes and velocities Suited for urban redevelopment sites
  • Atlantic States Legal Foundation, Inc. 05.26.2010Vegetated Swales (Bioswales) reduce the volume of run-off by 15% or more, as compared to curbs, gutters, and sewers Suspended solids: 30% to 70% removal, nutrients: 10% to 30% removal.
  • Atlantic States Legal Foundation, Inc. 05.26.2010 Permeable Pavement Runoff reduction & groundwater recharge Pollutant removal:  heavy metal, 98%;  Suspended solid, 82-95%  Nutrients, 65-85%
  • Atlantic States Legal Foundation, Inc. 05.26.2010Rain Barrels & Cisterns Reduce runoff generated from rooftops Delay & reduce peak runoff flow rates Reduce water consumption
  • Atlantic States Legal Foundation, Inc. 05.26.2010Urban Forestry Increases 10% in tree cover will reduce 2-5% total runoff and peak runoff rates Urban tree planting can be incorporated into stormwater management
  • Atlantic States Legal Foundation, Inc. 05.26.2010Additional Benefits of GI Cleaner Air Reduced Urban Temperatures & energy demands Source Water Protection Cost Savings Native habitat creation & connection Urban/community beautification Increased land & property values Economic stimulus & job creation
  • Atlantic States Legal Foundation, Inc. 05.26.2010Can green infrastructure solve allstormwater problems?