Scientific Investigations Report 2008–5204
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2008–5204
Table 2. Measurements of mud run-up heights on trees and calculations of indirect debris-flow velocity for Mount Jefferson debris flow, Oregon, November 6, 2006.
[Indirect debris flow velocity: Velocity was determined by an equation proposed by Chow (1959). Shading indicates values used in indirect velocity equation. Altitude is referenced to the National Geodetic Vertical Datum of 1929 (NGVD 1929). Abbreviations: m, meter; m/s, meter per second; –, no data]
| Tree and index No. for mud run-up measurements (see fig. 14) |
Latitude (decimal degrees) |
Longitude (decimal degrees) |
Altitude (m) |
Flow depth (m) |
Treediameter (m) |
Change in height of mud run-up (m) |
Indirect debris- flow velocity (m/s) |
Geomorphic location |
|---|---|---|---|---|---|---|---|---|
| 1 | 44.659 | -121.872 | 1,094 | 0.2 | 0.5 | 0.0 | 0.0 | valley floor |
| 2 | 44.659 | -121.872 | 1,092 | 0.1 | 0.3 | 0.1 | 1.2 | valley floor |
| 3 | 44.659 | -121.871 | 1,091 | 0.5 | 0.6 | 0.1 | 1.3 | valley floor |
| 4 | 44.660 | -121.866 | 1,124 | 0.2 | 0.0 | 0.1 | 1.3 | valley floor |
| 5 | 44.660 | -121.871 | 1,092 | 0.4 | 0.4 | 0.2 | 1.7 | valley floor |
| 6 | 44.659 | -121.872 | 1,092 | 0.5 | 0.6 | 0.2 | 1.7 | valley floor |
| 7 | 44.659 | -121.868 | 1,108 | 1.2 | 0.0 | 0.2 | 1.7 | confined channel |
| 8 | 44.659 | -121.870 | 1,074 | 0.9 | 0.8 | 0.2 | 1.7 | confined channel |
| 9 | 44.659 | -121.871 | 1,096 | 1.1 | 0.6 | 0.2 | 2.1 | valley floor |
| 10 | 44.660 | -121.869 | 1,102 | 0.6 | 0.4 | 0.3 | 2.4 | valley floor |
| 11 | 44.660 | -121.868 | 1,113 | 1.2 | 0.3 | 0.3 | 2.4 | valley floor |
| 12 | 44.659 | -121.871 | 1,092 | 0.6 | 0.6 | 0.3 | 2.4 | valley floor |
| 13 | 44.660 | -121.864 | 1,138 | 1.4 | 1.1 | 0.3 | 2.4 | confined channel |
| 14 | 44.660 | -121.866 | 1,131 | 2.4 | 0.8 | 0.6 | 3.5 | confined channel |
| 15 | 44.659 | -121.879 | – | 1.5 | 0.9 | 0.6 | 3.5 | valley floor |
| 16 | 44.659 | -121.877 | – | 1.7 | 0.6 | 0.6 | 3.5 | valley floor |
| 17 | 44.661 | -121.865 | 1,138 | 1.8 | 1.1 | 0.7 | 3.7 | confined channel |
| 18 | 44.661 | -121.865 | 1,178 | 1.8 | 0.6 | 0.7 | 3.7 | confined channel |
| 19 | 44.661 | -121.861 | 1,170 | 2.4 | 0.5 | 0.8 | 3.9 | confined channel |
| 20 | 44.661 | -121.862 | 1,180 | 2.4 | 0.5 | 0.8 | 3.9 | confined channel |
| 21 | 44.660 | -121.865 | 1,138 | 2.4 | 0.8 | 0.8 | 3.9 | confined channel |
| 22 | 44.659 | -121.869 | 1,106 | 1.1 | 0.9 | 0.8 | 3.9 | valley floor |
U.S. Department of the Interior | U.S. Geological Survey
URL: http://pubs.usgs.gov/sir/2008/5204
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