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Scientific Investigations Report 2013–5135


Modeling the Water-Quality Effects of Changes to the Klamath River Upstream of Keno Dam, Oregon


Table 8. Particulate organic material and algae load decreases (June 15–October 31) for scenario 6, Link‑Keno reach of the Klamath River, Oregon, 2006–09.


[Load decreases are the sum(s) of the monthly averaged volume (Q × time) multiplied by the monthly averaged concentration. Abbreviations: POM, particulate organic matter; ALG1, blue-green algae; C, carbon; N, nitrogen; P, phosphorus]


Year 25 percent load decrease (metric tons)
POM ALG1 POM+ALG1 Associated nutrient decrease
Organic C Organic N Organic P
2006 416 782 1,198 551 70.7 4.79
2007 353 827 1,179 542 69.6 4.72
2008 1,079 691 1,770 814 104 7.08
2009 1,454 427 1,880 865 111 7.52
Year 50 percent load decrease (metric tons)
POM ALG1 POM+ALG1 Associated nutrient decrease
Organic C Organic N Organic P
2006 832 1,565 2,396 1,102 141 9.58
2007 705 1,653 2,359 1,085 139 9.43
2008 2,158 1,382 3,540 1,629 209 14.2
2009 2,907 853 3,760 1,730 222 15.0
Year 90 percent load decrease (metric tons)
POM ALG1 POM+ALG1 Associated nutrient decrease
Organic C Organic N Organic P
2006 1,497 2,816 4,313 1,984 254 17.3
2007 1,269 2,976 4,245 1,953 250 17.0
2008 3,884 2,488 6,373 2,931 376 25.5
2009 5,233 1,536 6,768 3,113 399 27.1

First posted July 24, 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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