Scientific Investigations Report 2007–5164
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5164
Table 7. Comparison of fine material deposition in McKenzie River bed sediment measured from freeze cores during July 2002 and infiltration bags deployed from August 2003–July 2004.
[Location: this study/Steward and others, unpublished. Sediment amounts are expressed as a percent of the bulk material, by weight, in the indicated size fractions. Freeze core data are from bins B & C, as reported by Stewart and others (unpublished). Sampling locations for the infiltration bags and freeze cores were identical for the sites on the South Fork McKenzie and the main stem above the South Fork, but were different on the main stem below the South Fork, where the USGS site for infiltration bags was upstream from MS2. Values given are averages and standard deviations (in parenthesis) where possible. Abbreviations: mm, millimeter; <, less than]
| Location | Percent of deposited sediment in indicated fraction | |||||||
|---|---|---|---|---|---|---|---|---|
| Sand and smaller (< 2 mm) |
Silt and clay (<0.063 mm) |
Silt and clay, (as percent of sand) |
||||||
| Infiltration bags |
Freeze cores |
Infiltration bags |
Freeze cores |
Infiltration bags |
Freeze cores |
|||
| McKenzie River above South Fork, near Rainbow MRBO / MS1 | 10.7 (1.7) | 18.3 (5.0) | 0.2 (0.02) | 1.7 (0.5) | 2.1 (0.1) | 9.3 (0.0) | ||
| South Fork McKenzie above Cougar Reservoir, near Rainbow SFCO / SFA2 (Bin C only) | 12.5 | 3.8 | .3 | .02 | 2.2 | .5 (.7) | ||
| South Fork McKenzie near Rainbow CGRO / SFB2 | 3.3 | 14.4 (10.2) | 1.0 | 2.4 (1.8) | 30.3 | 17.3 (8.0) | ||
| Blue River at Blue River BLUE | 6.2 | No data | 1.2 | No data | 21.8 | No data | ||
| McKenzie River near Vida VIDA / MS2 | 12.0 (2.1) | 16.4 (0.2) | 0.6 (0.1) | 1.7 (0.3) | 5.1 (1.3) | 10.6 (2.2) | ||
U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/sir/2007/5164
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