Influence of climate on progressive hillslope failure in Redwood Creek Valley, northwestern California
Open-File Report
83-259
By: Douglas N. Swanston, Robert Ruhl Ziemer, and Richard J. Janda
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Abstract
Both creep and earthflow processes control hillslope erosion over large parts of the Redwood Creek basin. The type of process and displacement rates are largely dependent on underlying bedrock type and precipitation input. Progressive creep with rates ranging from 1.0 to 2.5 mm/a dominates on slopes west of the Grogen fault underlain by sheared and foliated schists. Movement appears to respond primarily to annual increments of precipitation. Complex earthflows occur predominantly on slopes east of the Grogen fault underlain by sheared graywacke and mudstone. Movement rates range from 3.0 to 131.0 mm/a and characteristically display dominant rainy season movement.
Suggested Citation
Swanston, D.N., Ziemer, R.R., Janda, R.J., 1983, Influence of climate on progressive hillslope failure in Redwood Creek Valley, northwestern California: U.S. Geological Survey Open-File Report 83-259, 49 p. :ill. ;28 cm., https://doi.org/10.3133/ofr83259.
ISSN: 2331-1258 (online)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Influence of climate on progressive hillslope failure in Redwood Creek Valley, northwestern California |
| Series title | Open-File Report |
| Series number | 83-259 |
| DOI | 10.3133/ofr83259 |
| Year Published | 1983 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey ; Open-File Services Section [distributor], |
| Description | 49 p. :ill. ;28 cm. |