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Scientific Investigations Report 2007–5178

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5178

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Table 2. Regression models used to estimate suspended-sediment concentration from instream turbidity measurements on five unregulated streams in the North Santiam River basin, Oregon, waters years 1999–2006.

[A bias-correction factor is included (Bragg and others, in press). SSC, suspended-sediment concentration; T, turbidity]

Station
name		 Regression
equation		 R2
value
Upper basin stations
North Santiam SSC = 1.75 × T 1.04 0.893
Breitenbush SSC = 1.80 × T 1.08 .915
French SSC = 1.25 × T 1.01 .824
Blowout SSC = 1.35 × T 1.18 .928
Lower basin station
Little North SSC = 1.78 × T 1.02 0.915

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