BONUS Coffee Hour: Century of Trends: Historical perspectives on the evolution of water quality in the United States

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Time: 
Friday, November 21, 2014 - 4:00pm to 5:00pm
Place: 
The lecture begins in 112 Walker Building at 4:00 p.m.

Century of Trends: Historical perspectives on the evolution of water quality in the United States


About the talk

The USGS Century-of-Trends project seeks to quantify century to multi-decadal trends in the concentrations and loads of nutrients and carbon in US rivers. Proper analysis of long-term trends required developing a basic understanding of the major periods of water quality development in the U.S. The first half of this presentation focuses on broadly describing the evolution of water quality in the US since the late 19th century. The second half presents trend analysis for nitrate and alkalinity in U.S. rivers using data from the USGS, state agencies, municipalities, and other entities. The utility of using major ion ratios to discern watershed acidification processes will also be presented and discussed.  




About the speaker

Ted Stets, USGS National Research Program lecturer

 

 

Angela Rogers geography@psu.edu