Four types of swale were constructed along I-294 in 2010 to help filter pollutants in road runoff:
– Wet Swale with seed mixture 1
– Wet Swale with seed mixture 2
– Dry Swale
– Dry Swale with an under drain pipe
We monitored the vegetation in the 4 types of wetlands beginning in 2011
Highlights from our work:
- Desirable wetland species have become established in bioswales; however, invasive species remain among the dominants in approximately half of the bioswales.