The Role of Headwater Streams in Downstream Water Quality1 Alexander, Richard B. ; Boyer, Elizabeth W. ; Smith, Richard A. ; Schwarz, Gregory E. ; Moore, Richard B. Abstract Publication: Journal of the American Water Resources Association Pub Date: February 2007 DOI: 10.1111/j.1752-1688.2007.00005.x Bibcode: 2007JAWRA..43...41A