floating islands- green infrastructure technology for water … · • enhancements to 50- year...
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Floating Islands- Green Infrastructure Technology for
Water Quality and Habitat
• Floating Island Technology
• Multiple Benefits
• Applications
• Case Study § Western Michigan University (WMU) Kalamazoo, MI
Overview | Floating Islands
Made from BPA free recycled PET plastic
Safe for drinking water
PLASTIC MATRIX
Proprietary
Drilled planting holes Internal substructure Injected foam for buoyancy
Making Islands| Plastic and Matrix
Making Islands| Plants
Native aquatic plants
Fringed sedge
Rush
Blue flag iris
Swamp milkweed
Sweet flag
Ironweed Soft stem bulrush
Pollinator friendly
How islands are made | Anchoring
-Can float up and down -Changes with water level
-Can be tethered to posts
-Avoids plants drying out or flooding
-Row islands out
Benefits:
Design:
Technology | Supplement Natural Process
Microbial habitat for healthy periphyton and BioFilm development to improve water quality
Aeration can be added
Technology | The roots
Substantial hanging roots pull up nutrients. Microbes grow on roots.
Creates rich food source for beginning of food web.
Applications | Types of Water Bodies
Stormwater wet ponds Wastewater Ponds
Shallow lakes
Rivers
Backyard ponds
Harbors
Benefits | Multiple Benefits
Applications | Water Quality
Parameter Water Typical Removal (lb/yr)
Ammonia-N wastewater 400 - 2,300
Nitrate-N wastewater 600
stormwater 13
Total N wastewater 250 - 600
stormwater 50 - 250
Total P lake water 35
wastewater 500
stormwater 80
TSS wastewater 200
stormwater 2,000 - 35,000
lake water 5,000
BOD wastewater 200 - 20,000
stormwater 20,000
Applications | Main areas
• Nutrient and TSS Reduction in Wet Ponds
• • Enhance Habitat and BioDiversity • Replace littoral shelves that suffer
from water level variation
• Beautification/Softscape
• Shoreline Protection
Goldsworth Valley Enhancement Project
Great Lakes and St. Lawrence Green Infrastructure Conference May 31 - June 2, 2017 | Cobo Center, Detroit, Michigan
Goldsworth Valley Stormwater Detention Pond Kalamazoo, Michigan
• Enhancements to 50-year old, 3-acre stormwater detention pond, serving 150 acres • Sister project to the new 1,000+ seat Valley Dining Center • Dredging and removal of 50-years of runoff sediment accumulation • New upstream raingarden and bioretention stormwater control measures • Submerged diffused aeration equipment to improve water quality • Enhanced outflow structure modifications to increase treatment capacity • Invasive vegetation removal, new native vegetation buffer areas • Contech bridge system installed with LED lighting and snow melt features • New student gazebo picnic area with wi-fi internet access • Reflective garden areas with seating and artwork
WMU Case Study| Goldsworth Valley Enhancement Project
Brian Boyer, P.E. Kieser & Associates, LLC Environmental Engineering Mgr. [email protected]
Autumn Boos Midwest Floating Island Director of Sales and Marketing [email protected]