Summer 2016 Resources and Publications

Seasonal and spatial variabilities in the water chemistry of prairie pothole wetlands influence the photoproduction of reactive intermediates
McCabe, A.J. and W. A. Arnold. 2016. Chemosphere.

The hydrology and water chemistry of prairie pothole wetlands vary spatially and temporally, on annual and decadal timescales. Pesticide contamination of wetlands arising from agricultural activities is a foremost concern. Photochemical reactions are important in the natural attenuation of pesticides and may be important in limiting ecological and human exposure. Little is known, however, about the variable influence of wetland water chemistry on indirect photochemistry.

Improved Methods to Estimate the Effective Impervious Area in Urban Catchments Using Rainfall-Runoff Data
Ebrahimian, A., B.N. Wilson and J.S. Gulliver. 2016. Journal of Hydrology, 536, 109-118.

The objective of this study is to improve the rainfall-runoff data analysis method for estimating EIA fraction in urban catchments by eliminating the subjective part of the existing method and by reducing the uncertainty of EIA estimates. 

Abiotic Capture of Stormwater Nitrates with Activated Carbon
Erickson, A.J., J.S. Gulliver, W.A. Arnold, C. Brekke and M. Bredal. 2016.  Environmental Engineering Science, doi:10.1089/ees.2015.0469.

Stormwater runoff from urban and agricultural watersheds carries nitrate, which is difficult to remove because it is highly soluble and thought to be relatively inert in abiotic processes such as ion exchange and sorption. Thus, current practice relies on denitrification to capture nitrate in stormwater treatment practices, requiring storage of captured stormwater, anaerobic conditions, and enough residence time for the bacteria to convert nitrate to nitrogen gas.

Comment on “Climate and agricultural land use change impacts on streamflow in the upper Midwestern United States”
Schottler, S., J. Ulrich and D. Engstrom. 2016. Water Resources Research.

Mixing effects on light exposure in a largelake epilimnion: A preliminary dualdye study
Minor, E.C., J.A .Austin, L. Sun, L. Gauer and R.C. Zimmerman. 2016 - Limnology and Oceanography Methods.

Light plays a critically important role in driving photo- and biogeochemistry of aquatic systems, and our ability to measure and model submarine light fields is fairly sophisticated. However, previous approaches have relied almost entirely upon Eulerian rather than Lagrangian measurements. Such approaches can provide good estimates of the instantaneous light field but do not necessarily reflect the doses of light experienced by particles and chemical species passively transported by physical processes within a lake or ocean surface-layer.

Review of the Minnesota Department of Health Contaminants of Emerging Concern Program Process for Selecting Chemicals
Conducted by the University of Minnesota Water Resources Center and the Humphrey School of Public Affairs. May 2016.  Principle Investigators: Ann Lewandowski, University of Minnesota Water Resources Center, Steve Kelley, Humphrey School of Public Affairs, Research Assistants: James Meinert and  Claire Williams.

The University of Minnesota reviewed the process used by the Minnesota Department of Health’s Contaminants of Emerging Concern (MDH CEC) program to select chemicals to develop health-based guidance values. Read the review on the Minnesota Department of Health website.