learn over lunchIndiana Watersheds Webinar Series Webinars to Strengthen Watershed Management in Indiana

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Continuous Monitoring of Pollution in the Nation’s Precipitation with a Focus on Conditions in Indiana and the Great Lakes

Aired: July 10, 2013 from noon to 1pm Eastern

Since 1978, the National Atmospheric Deposition Program (NADP) has tracked the status and changes in the many different chemical compounds within precipitation across the continent. The NADP monitors the removal of pollutants from the atmosphere; but more importantly, it monitors the addition of chemical compounds into the Biosphere and ecosystems of North America. Join us to learn about trends in mercury and nitrogen deposition


Martin Risch



David Gay

Meet the Presenters:

Martin Risch, Research Hydrologist, U.S. Geological Survey

Martin Risch joined the USGS in 1990 and works as a research hydrologist and project chief. He leads research in the eastern USA about mercury deposition and methylmercury in reservoirs and major rivers. An author of over 30 USGS publications and scientific papers, he has presented at national and international scientific meetings and is active with the National Atmospheric Deposition Program. He received the Department of Interior Superior Service Award in 2009.

David Gay, Program Coordinator, Illinois State Water Survey

David Gay is currently the Coordinator of the National Atmospheric Deposition Program, and a Research Scientist with Illinois State Water Survey, a division of the Prairie Research Institute at the University of Illinois-Urbana Champaign. Dr. Gay's research interests include monitoring of wet deposition of mercury, dry deposition of mercury, statistical trends determination, and monitoring of ammonia/ammonium across the Midwest.


Presentation slides (in pdf) - David Gay; Martin Risch

View the archived webinar

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