Stream Cross-Vane Structure (IMAGE) American Society of Agronomy Caption In-stream nitrogen removal was not as good below this cross-vane structure. However, the reconnected floodplain was an area with high microbial activity and greater ability to remove nutrients. Credit Molly Welsh Usage Restrictions Please use with story only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.