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Scientific Investigations Report 2010–5038

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Prepared in cooperation with the City of Salem

Suspended-Sediment Budget for the North Santiam River Basin, Oregon, Water Years 2005–08

By Heather M. Bragg and Mark A. Uhrich

Figures

Figure 1. Location of study area and water-quality monitoring stations, North Santiam River basin, Oregon.

Figure 2. Mount Jefferson and the Milk Creek debris flow deposits of November 6, 2006, North Santiam River basin, Oregon.

Figure 3. Correlation of replicate cross-sectional suspended-sediment samples, North Santiam River basin, Oregon, water years 1999–2008.

Figure 4. Regression models for the relation of turbidity and suspended-sediment concentration at North Santiam, North Santiam River basin, Oregon, water years 1999–2004.

Figure 5. Suspended-sediment concentration, streamflow, and sample collection at North Santiam, North Santiam River basin, Oregon, November 5–7, 2006.

Figure 6. Sources of suspended sediment used for budget calculations, North Santiam River basin, Oregon, water years 2005–08.

Figure 7. Annual mean streamflow at two streamflow-gaging stations, North Santiam (14178000) and Little North (14182500), North Santiam River basin, Oregon, water years 1999–2008.

Figure 8. Annual peak streamflow at two streamflow-gaging stations, North Santiam (14178000) and Little North (14182500), North Santiam River basin, Oregon, water years 1999–2008.

Figure 9. Suspended-sediment loads for seven monitoring stations, North Santiam River basin, Oregon, water years 2005–08. Error bar indicates 90-percent prediction interval estimate for each annual SSL value.

Figure 10. Total monthly suspended-sediment budget, North Santiam River basin, Oregon, water years 2005–08.

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

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