A riparian is the zone between a stream or river and the land adjacent to it.
 

Riparian zones can include grasslands, woodlands, wetlands
or other vegetated areas.
 

The Storm Water Ordinance defines a riparian environment as “vegetated areas within the limits of the regulatory flood plain bordering a waterway that provides habitat or amenities dependent on the proximity to water.” 

The riparian zone is important because it acts as a natural biofilter and buffer, protecting the stream from the effects of storm water runoff pollution and excessive soil erosion and sedimentation.  They filter out pollutants, suspended soil particles and help cool the water which aids in oxygen retention.  They also provide food and shelter for a variety of animals.

Riparian areas or stream corridors are primarily managed to maintain stream flow.  Blockages are removed to keep the conveyance channel open and free.  Removing these blockages helps reduce flood damages as the natural capacity to convey flood flows is maintained.

Visit the DuPage County Riparian Area webpage for more information.