Suspended-Sediment Loads and Yields in the North Santiam River Basin, Oregon, Water Years 1999-2004

Scientific Investigations Report 2007-5187
Prepared in cooperation with the City of Salem
By: , and 



The North Santiam River provides drinking water to the residents and businesses of the city of Salem, Oregon, and many surrounding communities. Since 1998, water-quality data, including turbidity, were collected continuously at monitoring stations throughout the basin as part of the North Santiam River Basin Turbidity and Suspended Sediment Study. In addition, sediment samples have been collected over a range of turbidity and streamflow values. Regression models were developed between the instream turbidity and suspended-sediment concentration from the samples collected from each monitoring station. The models were then used to estimate the daily and annual suspended-sediment loads and yields. For water years 1999-2004, suspended-sediment loads and yields were estimated for each station. Annual suspended-sediment loads and yields were highest during water years 1999 and 2000. A drought during water year 2001 resulted in the lowest suspended-sediment loads and yields for all monitoring stations. High-turbidity events that were unrelated or disproportional to increased streamflow occurred at several of the monitoring stations during the period of study. These events highlight the advantage of estimating suspended-sediment loads and yields from instream turbidity rather than from streamflow alone.

Study Area

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Suspended-Sediment Loads and Yields in the North Santiam River Basin, Oregon, Water Years 1999-2004
Series title Scientific Investigations Report
Series number 2007-5187
DOI 10.3133/sir20075187
Edition -
Year Published 2007
Language ENGLISH
Publisher Geological Survey (U.S.)
Contributing office(s) Oregon Water Science Center
Description vi, 27 p.
Time Range Start 1998-10-01
Time Range End 2004-09-30
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