JAMIE VELKOVERH
Three rain events were characterized in the spring of 2005 on the St. Paul campus at the University of Minnesota-Twin Cities. The St. Paul campus is unique in that rainwater runoff comes from intensively agricultural and urban land use. The stormwater was collected in the Forebay Inlet to the Sarita Wetland. Water samples were filtered and run by synchronous-scan emission fluorescence spectroscopy a Δ λ values of 75 nm. Emission peaks were analyzed on PeakFit software for fulvic and humic acids. Correlations were made between abundance of fulvic and humic acids compared to water level of each sample. Similarly, organic matter extracts were analyzed by synchronous-scan emission fluorescence spectroscopy at Δ λ values of 75 nm, as well as 3D synchronous-scan emission fluorescence spectroscopy for comparison. We can conclude what land conditions the water ran through before it reached the forebay inlet and what organic material the water came in contact with. The fluorescent organics identify the source areas and timing of stormwater responses leading to better evaluation of Best Management Practices.