Urban Water Quality Issues - Green Design & Development

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    12-May-2015

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Dwane Jones

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  • 1.http://www.bae.ncsu.edu/topic/lid/ Dwane Jones [email_address] 919.249.5959

2. Introduction: What is Green Design & Development? Green Design & Development 3. http://www.bae.ncsu.edu/topic/lid/ Working Definition Green Building and Development isenvironmental responsiveness. It is integrating water quality, and air qualityconcepts with building technology. Green Design & Development 4. Source: USGBC 5. Source: USGBC 6. Source: USGBC 7. Source: USGBC 8. Source: USGBC Source: USGBC 9. Source: USGBC Daylighting Solar Panels Green Roof Bike Paths Biodiesel/Other Fuels Bicycles Water Harvesting Multi-Use Recycling Efficient Lighting Natural Air Flow + 10. Source: USGBC 11. Source: USGBC 12. Green Planning Green Design & Development 13.

  • Conventional land development involvesremoval of all vegetation, compacting the soil and putting in large areas of hard (impervious) surfaces like roads, parking lots and roofs . The compacted soil and impervious surfaces prevent stormwater from soaking into the ground (called infiltration). This results in a tremendous increase in surface runoff.
  • By traveling much faster, stormwater runoff overwhelms streams causing flooding, damaging public and private property and destroying habitat for fish and wildlife.

http://www.bae.ncsu.edu/topic/lid/ 14.

  • Further, conventional practices collect andconvey stormwater runoff through storm drains and pipesto a centralized, manmade stormwater facility to manage stormwater flow and remove pollutants.
  • This typically requiresextensive use of pipes and sometimes large, costly, stormwater best management practices .

15.

  • Natural areas
  • Smaller lawns
  • Better pedestrian access
  • Wildlife Habitat
  • Open Space
  • Wooded Lots

Modern Trend: Homebuyers 16. Forsyth County July 2006-331,859 April 2000-306,044 +25,815 (most recent census) Growth Trends: North Carolina 17. + 18.

  • Design, construct, & maintaineach development site toprotect , orrestore , thenatural hydrology(the scientific study of the properties, distribution, and effects of water on the earth's surface) of the site so that the overall integrity of the watershed is protected. This is done by creating a hydrologically functional landscape.

http://www.bae.ncsu.edu/topic/lid/ 19. 20.

  • -Minimize land clearing
  • - Amended Soils
  • -Minimize use of impervious surfaces
  • -Infiltration
  • -Natural hydrology

-Removal of most or all vegetation -Soil Compaction -Use of large amounts of impervious surfaces -Costly infrastructure -Altered hydrology 21. LID PRACTICE / DEVICE Peak Flow Control Volume Reduction Water Quality Improvement Water Conservation Bio-retention Cell Cistern ~~>