Jenna Ladd | December 23, 2016
A 2016 report from the Iowa Department of Natural Resources in partnership with the Iowa Department of Agriculture and Land Stewardship summarizes Iowa’s water quality monitoring efforts.
The report, which was also supported by Iowa State University and the University of Iowa IIHR—Hydroscience and Engineering Center, provides a complete list of all nutrient-specific water monitoring sites in the state. The first of its kind, it was developed to inform the Iowa Nutrient Reduction Strategy. The Iowa Nutrient Reduction Strategy aims to monitor and reduce nutrients delivered to Iowa waterways and subsequently to the Gulf of Mexico by 45 percent.
Iowa Secretary of Agriculture Bill Northey said,
“Iowa has a comprehensive water quality monitoring effort in place that is supported by a variety of partners. Monitoring results were central to identifying the practices highlighted in the Iowa Nutrient Reduction Strategy and have provided valuable information as we have established priority watersheds. It continues to be an important part of our efforts as we work to increase the pace and scale of practice adoption needed to improve water quality.”
The report outlined all water monitoring efforts according their type and scale:
- Edge-of-field monitoring
- Researchers partner with farmers to monitor water quality on the edge of farm fields in order to accurately prioritize nutrient reduction practices.
- Paired watershed monitoring
- These are sites wherein the effectiveness of conservation practices are tested on two similar watersheds, one watershed receives intentional conservation measures and the other does not.
- Large watershed monitoring (950,000 total acres)
- These sites are either part of University of Iowa’s IIHR – Hydroscience and Engineering management of 45 real-time management stations or Iowa DNR’s 60 statewide sites.
- Small watershed monitoring (22,500 total acres)
- Several small watershed monitoring projects are ongoing including 18 established by the Iowa Water Quality Initiative. Many of these projects measure the effectiveness of conservation practices implemented by farmers.
The report also detailed the many challenges associated with nutrient-specific water quality monitoring. Complicating factors can include frequently changing land-use, varying streamflow and precipitation, and a lack of long-term monitoring records.
Iowa DNR director Chuck Gipp said, “While challenges exist, we believe continued nutrient monitoring is critical to understanding what Iowa can do to be successful.” He added, “All partners involved in developing this report know the value of long-term evaluation and are committed to continuing with a science-based approach to nutrient reduction in Iowa waters.”