Scientific Investigations Report 2006–5106

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5106

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Table 1. Mean annual wet deposition of dissolved inorganic nitrogen and annual precipitation at four National Atmospheric Deposition Program (NADP) sites, western Washington.

[NADP site locations shown in figure 1. Abbreviations: DIN, dissolved inorganic nitrogen; N, nitrogen; cm, centimeter; kg/ha, kilogram per hectare]

NADP site name NADP
station No. 		Period of
record		 Number of
years of
qualified data 		Average
annual wet
deposition
of DIN
(kg/ha as N)		 Annual
precipitation
(cm)
Hoh Ranger Station WA14 1980–2002 17 1.03 ± 0.38 338 ± 57
La Grande WA21 1984–2002 19 1.04 ± .29 97 ± 22
Tahoma Woods WA99 1999–2002 4 .68 ± .33 103 ± 31
Marblemount Ranger Station WA19 1984–2002 19 1.85 ± .46 103 ± 37

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For more information about USGS activities in Washington, visit the USGS Washington Water Science Center home page.

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