Sediment erosion and delivery from Toutle River basin after the 1980 eruption of Mount St. Helens: A 30-year perspective
February 1, 2018
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.
Citation Information
| Publication Year | 2018 |
|---|---|
| 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 |
| Authors | Jon J. Major, Adam R. Mosbrucker, Kurt R. Spicer |
| Publication Type | Book Chapter |
| Publication Subtype | Book Chapter |
| Index ID | 70197213 |
| Record Source | USGS Publications Warehouse |
| USGS Organization | Volcano Science Center |
Related Content
Adam R. Mosbrucker
Geologist
Geologist
Lidar Coordinator
Lidar Coordinator
Email
Phone
Kurt Spicer
Supervisory Hydrologic Technician
Supervisory Hydrologic Technician
Email
Phone
Related Content
- Connect
Adam R. Mosbrucker
GeologistLidar CoordinatorEmailPhoneKurt Spicer
Supervisory Hydrologic TechnicianEmailPhone