Scientific Investigations Report 2006–5106
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5106
Figure 16. Relation between the δ18O of nitrate and the δ15N of nitrate in Lynch Cove, September 2004, (see equations 5 and 6) and mean δ15N (±1 standard deviation) of upper-layer particulate organic matter and nitrate in Union River, western Washington.
(Data for Union River are from Frans and others, 2006).
For more information about USGS activities in Washington, visit the USGS Washington Water Science Center home page.