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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 A. Model-calibration data set for Johnson Creek at Regner Road at Gresham, Oregon, January 2006–January 2009.


Date Turbidity from
fixed-location
sensor
(Formazin
Nephelometric Units)		 Streamflow
(cubic fee
per second)		 Suspended-
sediment
concentration
(milligrams
per liter)		 Percentage of
suspended-
sediment
finer than
62 micrometers
2006
January 30 125 174 68 97
April 10 302 99 167 98
November 6 109 77 49 98
92.8 67 39 97
94 96 55 95
November 7 227 575 216 91
November 8 81.1 147 57 95
2007
March 12 89 97 63 97
December 3 171 798 133 92
December 3 148 753 118 92
December 24 120 294 76 91
2008
December 29 181 688 198 92
2009
January 1 248 848 266 92
252 843 267 94
January 2 382 1,040 288 92
328 927 263 91
203 361 148 88

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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