Check out these new publications from United States Geological Survey regarding the Great Lakes and Wisconsin waters:
Taking the Pulse of a River System: Research on the Upper Mississippi River System
A New Map of Standardized Terrestrial Ecosystems of the Conterminous United States
Trends in Streamflow and Nutrient and Suspended-Sediment Concentrations and Loads in the Upper Mississippi, Ohio, Red, and Great Lakes River Basins, 1975-2004