Low Impact Development/Green Infrastructure

Urban stormwater management has two fundamental purposes: minimizing the impact of increased runoff quantity and preventing pollutants from migrating to our natural waterways through stormwater conveyance systems. Low Impact Development (LID) and Green Infrastructure (GI) systems are engineered to moderate impacts of land development by providing the same services as natural systems including infiltration, evapotranspiration, filtration, and detention of stormwater. Implementing LID/GI in urban environments is challenging. Many LID best management practices (BMPs) require a footprint larger than what is available on a highly developed site. That doesn’t mean LID is not possible, it just means the solution may take a more engineered form. That’s where Contech comes in.

Bioretention and Subsurface Infiltration with ChamberMaxx

Given its aesthetic appeal, bioretention is often the first choice for Low Impact Development (LID) and Green Infrastructure (GI) design. ChamberMaxx can help make bioretention practical for sites with limited footprints. The open-bottom plastic chamber allows infiltration into surrounding soil, effectively achieving runoff reduction objectives. ChamberMaxx is ideal when you need to maximize storage capacity in shallow footprint bioretention cells.

Bioretention and Subsurface Infiltration with Perforated CMP

Perforated CMP stores stormwater runoff exceeding a site’s allowable discharge rate and releases it slowly over time. Various coatings are available to achieve 75-100 year design service life. Rectangular, L-shaped, and staggered cells are frequently used to design around existing utilities. 

Bioretention Pretreatment

Keeping LID and GI sites free from fine sediments, oils, trash, and debris while functioning as designed can be time consuming and costly.  The practice of combining LID with treatment systems like the Jellyfish Filter or CDS is becoming more common. Doing so increases water quality, provides a single point of maintenance, promotes proper system functionality, and increases the aesthetic appeal by removing unsightly trash and debris.

Biofiltration / Bioretention with Filterra

Implementing Low Impact Development (LID) and Green Infrastructure (GI) in urban environments is challenging, as they often require a large footprint. Contech has addressed this by developing Filterra, an engineered biofiltration/bioretention system optimized for high volume/flow treatment and high pollutant removal. The combination of landscape vegetation and a specially designed filter media allows bacteria, metals, nutrients, and total suspended solids (TSS) to be removed naturally.

Rainwater Harvesting

Rainwater harvesting is fast becoming a leading tool for engineers to reduce runoff reduction and meet Low Impact Development (LID) and Green Infrastructure (GI)  goals. In addition to irrigation, harvested water can be used for toilet flushing, process water, and cooling make-up. With the UrbanGreen Rainwater Harvesting System, you have all the components to build an efficient and effective water re-use or runoff reduction integrated management practice.