Atmospheric deposition of nitrogen in the United States Pacific Northwest for 2002 summarized for NHDPlus v2 catchments
This spatial data set was created by the U.S. Geological Survey (USGS) to represent the amount of atmospheric 
nitrogen deposition in the Pacific Northwest region of the United States (Hydro Region 17; Major River Basin 7 
(MRB7)) during 2002 within each incremental watershed delineated in the NHDPlus v2 dataset.