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
Build Bioswale: Use the button above to reveal each of five steps that explain how a bioswale works.
Open stone bed
Urban areas include sidewalks of various widths with curbs that run along the edges of the street.
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
Stormwater typically flows along streets into drains and often pools against curbs during heavy rainfall.
A tree guard protects trees and native plants in the plantbed. Piezometers collect water infiltration data.
Bioswales provide enhanced management of stormwater
runoff and create spaces for plants and animals in urban areas.
Trees and Native Plants
Piezometers collect data used to study effectiveness of bioswales.
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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
Permeable Pavement can be an integral part of urban stormwater control efforts.
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Stormwater drains through open pores.
Cutaway of Permeable Pavement
Blue & Green Roofs
BLUE & GREEN ROOFS
Blue Roofs contain non-vegetated source controls that detain stormwater and provide sustainability benefits such as rooftop cooling.
Drain storage tray
Green Roofs can absorb and retain large amounts of stormwater. They also absorb air and noise pollution, as well as provide rooftop cooling.
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Blue and Green roofs can be mixed.
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.
The inlet that receives stormwater.EndFragment
Catch basins provide pretreatment and sediment removal.
Pocket wetlands also provide urban wildlife habitats.
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.
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
Consists of the pond, grasses and shoreline elements.EndFragment
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Ongoing data collection provides verifiable results that demonstrate the effectiveness of Hazen’s stormwater solutions.EndFragment
Monitoring stormwater storage at a client bioswale site.
Our expertise and experience will ensure long-term success.EndFragment