Manage Stormwater Run-off with Vegetative Bioretention Basins

Evora Consulting’s team of scientists and engineers have designed a vegetative bioretention basin that can greatly reduce concentrations of nitrogen, total suspended solids, biochemical oxygen demand, and ammonia nitrogen in stormwater.  By converting your existing detention basin to a flow-through vegetative bioretention basin, you will be able to better manage stormwater run-off from your site and reduce the amount of potential pollutants in your stormwater.


Implementing this vegetative bioretention basin creates a biofiltration treatment area that will allow stormwater runoff to be managed through soil infiltration, microbial activity, and vegetation uptake. While flowing through the basin, stormwater will be treated by the soils and perennial vegetation within the basin area. Soil helps to filter the stormwater, and pollutants are removed/processed by microorganisms in the soil and the plants leaving the treated stormwater cleaner than the water that enters.


Potential stormwater run-off pollutants include nutrients, pathogens, organics, sediment and others. Implementation of a vegetative bioretention basin for one client showed dramatic reduction in a number of parameters, as shown in the table.

For more information, please contact our Director of Engineering Operations, Brian Rath, P.E. @ 515-256-8814.