Research Finds Constructed Wetlands Most Cost-Effective Way to Reduce Ag Runoff

Research led by the University of Kansas found that constructed wetlands are the most cost-effective way to reduce nitrate and sediment loads from agricultural runoff in large streams and rivers. A study published in Proceedings of the National Academy of Sciences used computer modeling to compare watershed approaches to reducing runoff in the Le Sueur River Basin in southern Minnesota. Constructed wetlands at the watershed scale were the most cost-effective way to cut the types of runoff from the Mississippi River Basin that contribute to the Gulf of Mexico “Dead Zone.”