Wetland Infrastructure Upper Mimico Creek
Shore Wetlands
Organic Contaminant
Terraced Wetlands
Floating Islands
Contaminant Level
Nutrient Contaminant
Suspended Sediment
Road Density
Floating Islands Location: Along Mimico Creek Function: Fish Habitat Solid Sediment Nutrient Contaminant Organic Contaminant Heavy Metal
Blue Flag Iris
Cardinal Flower
Greater Water Dock
Sweetflag
Fringed Loosestrife
Floating Basic
Trumpet Pitchers
Dwarf Papyrus
Plants
Heavy Metal
Level of Urbanization Etobicoke Creek
Mimico Creek
6.1 km/km
8.6 km/km
2
Humber River
Don River
3.6 km/km
2
9.4 km/km
2
2
Highland Creek
Rouge River
9.4 km/km
4.4 km/km
2
Duffins Creek
Caruthers Creek
2.0 km/km
2
Floating Islands
Floating Material
3.2 km/km
2
2
Shore Wetlands Location: Along Mimico Creek, near output of sewer system Function: Fish Habitat Solid Sediment Nutrient Contaminant Organic Contaminant Heavy Metal
Bur Reed
Arrowhead
Water Arum
Common Reed
Variegated Horsetail
Cattail
Emergent Plant
Floating Water-plantain
Nymphoides Peltatum
Plants
Shore Wetlands
Terraced Wetlands Location: Along Mimico Creek, at intersections with roads Function: Fish Habitat Solid Sediment Nutrient Contaminant Organic Contaminant Heavy Metal
Mimico Creek Contamination Levels
Chloride
Copper
E. coli
Nitrates
Iron
Phosphorus
TSS
Terraced Wetlands
Zinc Zeolite
0.05 mg/L
Soil & Gravel Filtration
Wild rice
Water Arum
Cattail
Willow Herb
Bur Reed
25th Percentile
30
20
Humber Bay
0.03
2.93
300
Mussel Recovery Wetland
100
5
120
0.015 mg/L
Pathogen Removal Wetlands
5 μg/L
3 mg/L
Meets Standards
Heavy Metal Removal Wetland
Provincial Standards
1.5 mg/L
2 μg/L
Nutrient Removal Wetlands
2 μg/L
Lower Mimico Creek
Plants
Wetland Sequence Nutrient Removal Wetlands
56 mg/L
Exceeds Standards Median
Blue Flag Iris
Sweetflag
Water Arum
First Level Plants (can tolerate poor water quality)
Common Coontail
Tape Grass
Waterweed
Redhead Grass
Second Level Plants (require freshwater)
Nutrient Removal Wetlands
Lake Shore Blood West
1165 μg/L
3000 CFU/100mL
75th Percentile
Common Frogbit
Location: Where Mimico Creek merges with Humber Bay Park Function: Fish Habitat Solid Sediment Nutrient Contaminant Organic Contaminant Heavy Metal
0.135 mg/L
16 μg/L 1200 mg/L
Sources of Contamination
Organic Contaminants
Nutrient Contaminants
Heavy Metals
Suspended Sediment
Causes
Causes
Causes
Causes
Humber Bay Park Bridge
86 μg/L
Pathogen Removal Wetlands Location: Base of Mimico Creek and before mussel recovery area Function: Fish Habitat Solid Sediment Nutrient Contaminant Organic Contaminant Heavy Metal
Suburbs Industrial Park Airport Faeces
Fertilizer runoff Septic systems leaks
Septic systems leaks
Road salt
Effects
Spills
Leacheate from Landfills
Illegal dumping
Industry
Effects
Motor vehicles
Effects
Construction
Litter
Agriculture
Stream erosion
Urban grit
Excessive algae
Organic Contaminant
American Eel
Emerald Shiner
Gizzard Shad
Pathogen Removal Wetlands
Fish Species
Common Coontail
Effects
Cattail
Tape Grass
Willow Herb
Plants
O2 Gastrointestinal upset
Humber Bay Park North
Sewer leaks
Road intersections with creek
Suspended Sediment
Oxygen loss
Poor aquatic health Damage reproductive systems
Deformities in fish Damage riparian vegetation
Clogged gills/ Impaired sight
Clog pools
Carriers of other pollutants
Impair spawning habitat
Heavy Metal Removal Wetland
Nutrient Contaminant
Location: Location that is least influenced by flooding flow Requirement: Using floating plants to prevent algea from spreading out Function: Solid Sediment Nutrient Contaminant Organic Contaminant Algea Heavy Metal
Heavy Metal
Hornwort
Water Milfoil
Waterweed
Duckweed
Common Coontail
Algea
Water Lily
Asiatic Dayflower
Nymphoides Peltatum
Floating Species
Heavy Metal Removal Wetland
Water quality and quantity functions are
Mean Baseflow: 0.14m3/s Wetland Volume: 127,581 m3
Wetlands sized to promote Biodiversity
Land/Water Interface creates Nesting and Resting areas for
Cumulative
10 Days
0.7 - 3 ha
Wildlife
Water remains wetland system
Efficacy Increases with size
Extending Edges Creating wide riparian zones
Mussel Recovery Wetland Location: At the end of wetland sequence Requirement: Freshwater , shallow water and host fish Function: Solid Sediment Nutrient Contaminant Organic Contaminant Heavy Metal
Mussel Recovery
3
Mussel
Yellow Perch
Brook Stickleback
4
Pumpkinseed
Host Fish
Bur Reed
Common Arrowhead
3.0
56 7
1.5
0.8
0.7 1.2
3.3
8
0.9 1.2
Activity Area Human Activity Beach Location: after wetland sequence Requirement: Freshwater and stucture for sediment
9 10
Ontario Lake
Human Activity Beach
Water Flow Direction
7 WETLANDS
Mussel Recovery Wetland
Plants
Humber Bay Park South Humber Bay Park South
1 2
Mussel Cultivation
Troublesome Sedge
Foxtail Sedge
Wood Sage
Heal-all
Crataegus Submollis
Peachleaf Willow