Southeast Research and Demonstration Farm
Nitrate-nitrogen, as it relates to water quality in the Midwest, is tied to hypoxia in the Gulf of Mexico. Economic impacts due to loss of fishing in the Gulf along with environmental protection are a primary driver for reducing nitrate loads being delivered by the Mississippi River. Since a significant portion of nitrate-nitrogen export originates from subsurface drainage systems there is a need to implement practices that have the potential to reduce nitrate-nitrogen export. One way this can be done is through the use of constructed wetlands that denitrify the nitrate-nitrogen and release it to the atmosphere as nitrogen gas. The purpose of this project was to demonstrate the reductions in nitrate-nitrogen concentrations that can be achieved with a constructed wetland.
Iowa State University
Brenneman, Greg and Helmers, Matthew J., "Wetland Demonstration Project" (2011). Iowa State Research Farm Progress Reports. 272.