Partnering with NC DOT, NC State has constructed fourteen bioswales at the Sediment and Erosion Control Research and Education Facility (SECREF) here on campus. Using an on-site reservoir for a water source, and by spiking the water with nutrients & sediment, we are able to simulate a variety of storm flows through the swales to compare sets of variables. Slope, area / watershed ratio, geometry, media type, vegetation, and the use of check-dams are a few of the factors we have studied. NC DOT has used our results to implement changes for the better in the construction of new roadside swales.

Grantors: NC Department of Transportation

Project locations: NCSU SECREF Field Lab; Highway interchanges at NC-50 / NC-98 and I-40 / I-95; Mango Creek bridge, NC-540