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

March 20, 2010

Significant Findings
An analysis of sediment transport in the North Santiam River basin during water years 2005-08 indicated that:

Two-thirds of sediment input to Detroit Lake originated in the upper North Santiam River subbasin.
Two-thirds of the sediment transported past Geren Island originated in the Little North Santiam River subbasin.
The highest annual suspended-sediment load at any of the monitoring stations was the result of a debris flow on November 6, 2006, on Mount Jefferson.
About 86 percent of the total sediment input to Detroit Lake was trapped in the lake, whereas 14 percent was transported farther downstream.
More than 80 percent of the sediment transport in the basin was in November, December, and January.
The variance in the annual suspended-sediment loads was better explained by the magnitude of the annual peak streamflow than by the annual mean streamflow.

Publication Year 2010
Title Suspended-Sediment Budget for the North Santiam River Basin, Oregon, Water Years 2005-08
DOI 10.3133/sir20105038
Authors Heather M. Bragg, Mark A. Uhrich
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Scientific Investigations Report
Series Number 2010-5038
Index ID sir20105038
Record Source USGS Publications Warehouse
USGS Organization Oregon Water Science Center