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A HAZEN INTERACTIVE
Green Infrastructure Solutions
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Four green infrastructure solutions utilized by Hazen:EndFragment    
INTRO
Sustainable Watershed-based Stormwater Management Solutions EndFragment
Green Infrastructure uses natural processes such as infiltration, plant transpiration and evaporation to manage stormwater near where it falls in urban and suburban environments. These solutions significantly ease the strain on separate and combined sewer systems, directly improve water quality, reduce CSOs, and provide other quantifiable benefits.EndFragment    
3
Build Bioswale: Use the button above to reveal each of five steps that explain how a bioswale works.
Sidewalk
Infiltration
4
Open stone bed
5
Urban areas include sidewalks of various widths with curbs that run along the edges of the street. 
Bioretention EndFragment
Adding stone gabions enhance stormwater capacity.
Bioswales are cut into sidewalks with two overflow openings in curbs for stormwater to flow in and out.
Small-scale bioswales distributed along rights-of-way, with a stone gabion connecting the surface and subsurface stone layer, retain the most runoff, filter pollutants, and improve urban aesthetics.EndFragment    
Stone
Plant bed
Stormwater typically flows along streets into drains and often pools against curbs during heavy rainfall.
Curb
Bioswale cutout
A tree guard protects trees and native plants in the plantbed. Piezometers collect water infiltration data.  
Overflows
Stormwater Runoff
Stone Gabion
Bioswales provide enhanced management of stormwater runoff and create spaces for plants and animals in urban areas. 
Trees and Native Plants
Tree Guard
Engineered Soil
Piezometers collect data used to study effectiveness of bioswales.
Build Bioswale
Subsurface Stone
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BIORETENTION
Piezometer
Street
Bioswale
1
Evapotranspiration
Overflow
2
Parking Lane
Porous pavement provides retention benefits while maintaining stable parking surfaces. Porous pavement captures stormwater and allows it to percolate into the soil or flow into below-ground drains.EndFragment    
View Cutaway
Permeable pavers
Bike Lane
Uncompacted subgrade soil
Permeable Pavement EndFragment
Drain
Bedding stone
PERMEABLE PAVEMENT
Base stone
Tree Pit
Sub-base stone
CLOSE
Permeable Pavement can be an integral part of urban stormwater control efforts.
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Geotextile
Stormwater drains through open pores. EndFragment
Walkway
Cutaway of Permeable Pavement
Blue & Green Roofs EndFragment
Geotextile
BLUE & GREEN ROOFS
Corrugated plastic
Membrane
Insulation
Roof deck
Blue Roofs contain non-vegetated source controls that detain stormwater and provide sustainability benefits such as rooftop cooling.
Filter fabric
Aluminum Tray
Drain storage tray
Gravel
Green Roofs can absorb and retain large amounts of stormwater. They also absorb air and noise pollution, as well as provide rooftop cooling.
Waterproof membrane
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Protection board
Green Roofs
Plants
Blue and Green roofs can be mixed. EndFragment
Blue Roofs
Growing medium
Direct source control solutions such as blue and green roofs allow natural processes to provide the necessary quantity and quality control of stormwater runoff. Processes such as infiltration, soil storage, filtration, evaporation and vegetative uptake improve urban hydrology right at the source. EndFragment
Forebay
Woodlands
Wetland
The inlet that receives stormwater.EndFragment    
Catch basins provide pretreatment and sediment removal.
Sub-aquatic vegetation (SAV) uptake filters pollutants.
Forebay
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Micropool
POCKET WETLANDS
Pocket wetlands also provide urban wildlife habitats.
Catch Basin
Micropool
A shallow drainage area that provides sediment control.EndFragment    
Settling of larger solids and coarse organic materials.
Three Zones: Pocket wetlands are typically built in three zones.    
Pocket Wetlands range in size from 8 to 10 acres.
Wetland
Constructed marsh systems, such as pocket wetlands, control stormwater volume and provide pollutant removal by plants and absorption. Biodiversity is not as pronounced as in natural environments, but these wetlands do add natural environments to urban areas.  They also provide peak discharge volume control and water quality filtering.EndFragment    
Consists of the pond, grasses and shoreline elements.EndFragment    
Pocket Wetlands EndFragment
D.C.
Boston
CT
Fairfax County
Manchester
New York
Richmond
PA
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Akron
Norfolk
OH
Columbus
Raleigh
VA
300+ Constructed
Dormont
Havelock
NC
Verifiable Results
Philadelphia
Hazen’s Adaptive Lifecycle Projects
100+ Monitored
7,000+ Sited
WHY HAZEN?
800+ Designed
Ongoing data collection provides verifiable results that demonstrate the effectiveness of Hazen’s stormwater solutions.EndFragment    
Monitoring stormwater storage at a client bioswale site. EndFragment
Our expertise and experience will ensure long-term success.EndFragment    
A Proven Team EndFragment
NY
NH
Bridgeport/New Haven
MA