Sediment erosion and delivery from Toutle River basin after the 1980 eruption of Mount St. Helens: A 30-year perspective
Edited by: Charles Crisafulli and V. Dale
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Abstract
Exceptional sediment yields persist in Toutle River valley more than 30 years after the major 1980 eruption of Mount St. Helens. Differencing of decadal-scale digital elevation models shows the elevated load comes largely from persistent lateral channel erosion across the debris-avalanche deposit. Since the mid-1980s, rates of channel-bed-elevation change have diminished, and magnitudes of lateral erosion have outpaced those of channel incision. A digital elevation model of difference from 1999 to 2009 shows erosion across the debris-avalanche deposit is more spatially distributed compared to a model from 1987 to 1999, in which erosion was strongly focused along specific reaches of the channel.
| Publication type | Book chapter |
|---|---|
| Publication Subtype | Book Chapter |
| Title | Sediment erosion and delivery from Toutle River basin after the 1980 eruption of Mount St. Helens: A 30-year perspective |
| DOI | 10.1007/978-1-4939-7451-1_2 |
| Publication Date | January 30, 2018 |
| Year Published | 2018 |
| Language | English |
| Publisher | Springer |
| Contributing office(s) | Volcano Science Center |
| Description | 26 p. |
| Larger Work Type | Book |
| Larger Work Title | Ecological responses at Mount St. Helens: Revisited 35 years after the 1980 eruption |
| First page | 19 |
| Last page | 44 |
| Other Geospatial | Mount St. Helens |