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North Carolina CooperativeExtension Backyard Rain Garden           Program        Mitch Woodward, Charles Humphrey, Bill L...
Goal: Seeing roofand yard runoff as resource  rather thanwaste product
Raingardens slow water runoff  and improve water quality
Development Impacts   on the Water C ycle10%           55%      50%           15%                    Credit: NCSU
Rainfall       Storage            Infiltration    Rice Creek Watershed District
Rain Gardens Can Be Welcome Additions to Landscapes!!!
Design Principles of Rain Gardens• Handles stormwater at its source.• Decreases the velocity of water flowing from  imperv...
Rain garden benefits•Add beauty (and value) to your property•Minimizing rainwater runoff to storm drains or streams whilea...
Match $$$ provided by involving   County Extension Agents                         …..I’m just              $       matchin...
Garden Location & InstallationObserve your yard during a rainfall event                          • Where does water       ...
Rain garden planning•Source and path of stormwater•Size of impervious surfaces•Soils type (sandy, clayey, rocky or mixed)•...
Soil Evaluation
Be Aware of Clay Soils!
If drains less than 1 hour = too fast and plants won’t establishIf drains more than 48-72 hours = too wet ! Backyard wetla...
Rain Garden Installations
Raleigh       Day of Installation             + 18 MonthsRated as ‘Good’
Cary Fall After Installation     After 1 year, 2 inch rain• Fair• Continues to work well
Durham Museum of Life and Science Day of Installation          + 18 Months • Fair • Great Demonstration Site
Town Hall
Baldwin Park
Failures
Summary of Preliminary Analysis of Raingarden Condition.Rain gardener Type     Rain garden Condition*______               ...
Rain Gardens Maintenance Issues 2 Years after Installation.Maintenance Issue              Number of Rain gardens AffectedB...
www.bae.ncsu.edu/topic/raingarden
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Rain gardens for homeowners

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Rain gardens for homeowners

  1. 1. North Carolina CooperativeExtension Backyard Rain Garden Program Mitch Woodward, Charles Humphrey, Bill Lord,Dwane Jones, Bill Hunt, Kelly Collins, Lara Rozzell, Wendi Hartup, Charlotte Glen
  2. 2. Goal: Seeing roofand yard runoff as resource rather thanwaste product
  3. 3. Raingardens slow water runoff and improve water quality
  4. 4. Development Impacts on the Water C ycle10% 55% 50% 15% Credit: NCSU
  5. 5. Rainfall Storage Infiltration Rice Creek Watershed District
  6. 6. Rain Gardens Can Be Welcome Additions to Landscapes!!!
  7. 7. Design Principles of Rain Gardens• Handles stormwater at its source.• Decreases the velocity of water flowing from impervious surfaces.• Improves water quality before it enters the stream or ditch.• Facilitates infiltration• Beautiful
  8. 8. Rain garden benefits•Add beauty (and value) to your property•Minimizing rainwater runoff to storm drains or streams whileallowing excess rainwater to filter slowly into the soil•Protecting our valuable water resources•Provide wildlife habitat•Adaptable in scale and land use
  9. 9. Match $$$ provided by involving County Extension Agents …..I’m just $ matching funds to you, aren’t I?
  10. 10. Garden Location & InstallationObserve your yard during a rainfall event • Where does water travel or collect?
  11. 11. Rain garden planning•Source and path of stormwater•Size of impervious surfaces•Soils type (sandy, clayey, rocky or mixed)•Proximity to wells, foundations, septic systems•Existing landscape features
  12. 12. Soil Evaluation
  13. 13. Be Aware of Clay Soils!
  14. 14. If drains less than 1 hour = too fast and plants won’t establishIf drains more than 48-72 hours = too wet ! Backyard wetland?
  15. 15. Rain Garden Installations
  16. 16. Raleigh Day of Installation + 18 MonthsRated as ‘Good’
  17. 17. Cary Fall After Installation After 1 year, 2 inch rain• Fair• Continues to work well
  18. 18. Durham Museum of Life and Science Day of Installation + 18 Months • Fair • Great Demonstration Site
  19. 19. Town Hall
  20. 20. Baldwin Park
  21. 21. Failures
  22. 22. Summary of Preliminary Analysis of Raingarden Condition.Rain gardener Type Rain garden Condition*______ Good Fair FailureAvid 10 3 1GardenerEnvironmentalist 2 7Direct *Good: Maintained well,Connection 4 4 functioning as designed.To Resource Fair: Maintenance notFlooding 2 3 evident, still provide some treatmentIssues Failure: Not maintained, notRequired by functioning.Law 8 15 8**Educators /Schools 1 5
  23. 23. Rain Gardens Maintenance Issues 2 Years after Installation.Maintenance Issue Number of Rain gardens AffectedBerm / Weir Failure 6Plants / Planting 49Soils / Drainage 10Sedimentation / 8**CloggingMulching 38General Neglect / Abandoned 9
  24. 24. www.bae.ncsu.edu/topic/raingarden

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