Scientific Investigations Report 2007–5187
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5187
Suspended-Sediment Loads and Yields in the North Santiam River Basin, Oregon, Water Years 1999–2004
Prepared in cooperation with the City of Salem
By Heather M. Bragg, Steven Sobieszczyk, Mark A. Uhrich, and David R. Piatt
Table of Contents
Conversion Factors, Datums, and Abbreviations
Abstract
Introduction
Methods and Data Analysis
Suspended-Sediment Loads
Suspended-Sediment Yields
Summary and Conclusions
Future Studies
Acknowledgments
References Cited
Figures
Figure 1. Location of study area and water-quality monitoring stations in the North Santiam River Basin, Oregon.
Figure 2. A technician collecting a suspended-sediment sample using Equal-Width Increment method from the cableway at Breitenbush River above French Creek, near Detroit in the North Santiam River basin, Oregon, January 30, 2003.
Figure 3. Recorded and estimated turbidity values at North Santiam River below Boulder Creek, near Detroit, North Santiam River Basin, Oregon, October 1, 2000.
Figure 4. North Santiam River as seen from the cableway at North Santiam River below Boulder Creek, near Detroit, North Santiam River basin, Oregon, October 21, 2003.
Figure 5. First set (24 of 40 bottles total) of automatic pumped samples collected at North Santiam River below Boulder Creek, near Detroit, North Santiam River basin, Oregon, October 20-22, 2003.
Figure 6. Recorded and estimated turbidity values at North Santiam River below Boulder Creek, near Detroit, North Santiam River basin, Oregon, October 21, 2003.
Figure 7. Debris flow and a road failure (inset) in Blowout Creek subbasin in the North Santiam River basin, Oregon, December 17, 2001.
Figure 8. Recorded and estimated turbidity values at Blowout Creek near Detroit, North Santiam River Basin, Oregon, December 17, 2001.
Figure 9. Regression models for estimating suspended-sediment concentration from instream turbidity for monitoring stations in the upper and lower basins in the North Santiam River basin, Oregon.
Figure 10. Annual mean streamflow at gaging stations in the North Santiam River basin, Oregon.
Figure 11. Peak streamflow at gaging stations in the North Santiam River basin, Oregon.
Figure 12. Total annual and highest 3-day suspended-sediment load at monitoring stations in the North Santiam River basin, Oregon, water years 1999–2004.
Figure 13. Suspended-sediment yield at monitoring stations in the North Santiam River basin, Oregon, water years 1999–2004.
Tables
Table 1. Streamflow-gaging and water-quality monitoring stations used to collect water-quality samples in the North Santiam River basin, Oregon.
Table 2. Schedule of water-quality and suspended-sediment sample collection in the North Santiam River basin, Oregon.
Table 3. Regression models used for estimating suspended-sediment concentration from turbidity for monitoring stations in the North Santiam River basin, Oregon.
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Send questions or comments about this report to the author, Heather M. Bragg, (503) 251-3224.
For more information about USGS activities in Oregon, visit the USGS Oregon Water Science Center home page.
U.S. Department of the Interior | U.S. Geological Survey