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Scientific Investigations Report 2012–5200


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Suspended-Sediment Characteristics of the Johnson Creek Basin, Oregon, Water Years 2007–10


Appendix B. Model-calibration data set for Johnson Creek at Milwaukie, Oregon, December 2005–January 2009.


Date Turbidity from
fixed-location
sensor
(Formazin
Nephelometric Units)		 Streamflow
(cubic feet
per second)		 Suspended-
sediment
concentration
(milligrams
per liter)		 Percentage of
suspended-
sediment
finer than
62 micrometers
2005
December 22 170 552 221 96
2006
January 30 92 507 118 92
April 10 198 306 304 95
154 274 161 96
April 15 76.3 256 64 95
November 6 128 172 81 96
120 191 75 96
88.5 294 74 93
November 7 248 966 241 90
November 08 67 243 47 95
2007
December 3 188 1960 223 81
2008
January 31 255 527 341 94
March 13 57.7 179 61 95
March 14 155 276 115 96
November 6 84.8 152 100 96
December 29 161 905 244 89
2009
January 1 241 1,280 378 88
January 2 318 2,040 338 90
324 2,050 326 90

First posted October 3, 2012

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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