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Scientific Investigations Report 2013–5016


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Macrophyte and pH Buffering Updates to the Klamath River Water-Quality Model Upstream of Keno Dam, Oregon


Table 3. Acid dissociation constants for water, carbonic acid, ammonium, and phosphoric acid used in the model of the Link River to Keno Dam reach of the Klamath River, Oregon.


Acid dissociation constant Coefficient Reference
a1 a2 a3 a4 a5
Kw -283.971 -0.05069842 13,323.0 102.24447 -1,119,669.0 Stumm and Morgan (1996)
K1 -356.3094 -0.06091964 21,834.37 126.8339 -1,684,915 Stumm and Morgan (1996)
K2 -107.8871 -0.03252849 5,151.79 38.92561 -563,713.9 Stumm and Morgan (1996)
Kam -0.09018 0 -2,729.92 0 0 Emerson and others (1975)
KP1 4.5535 -0.013486 -799.31 0 0 Bates (1951)
KP2 5.3541 -0.019840 -1,979.5 0 0 Bates and Acree (1943)
KP3 -12.38 0 0 0 0 Dean (1985); KP3 without temperature dependence

First posted March 1, 2013

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Avenue
Portland, Oregon 97201
http://or.water.usgs.gov

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