This project will promulgate a nitrate water quality standard to address aquatic life toxicity, and gather information needed to support the development of total nitrogen (N) loading reduction strategies for Minnesota’s waters and also address Minnesota’s contribution to marine water hypoxia. Project will also develop a framework for a watershed nitrogen planning aid that can be used to optimize selection of Best Management Practice (BMP) systems for reducing nitrogen.
Project outcomes include results from hydroponics experiments, which will likely consist of information on the response of wild rice growth to a range of concentrations of sulfate, sulfide, and various cations. Results from these experiments will be used to help determine what additional research is needed in 2013. The MPCA will use this data to evaluate the current sulfate standard and the need, if any, for modifications to it.
Project outcomes include data that will ultimately allow the MPCA to quantitatively compare the environmental conditions (surface water and sedimentary geochemistry) at sites that successfully support wild rice growth to sites that do not support wild rice. These data, in particular the analysis of the porewater samples obtained under this project, will be compared to the results from a separate project that will assess the growth of wild rice using hydroponic methods.