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Rates and processes of channel development and recovery following the 1980 eruption of Mount St. Helens, Washington

Hydrological Sciences Journal/Journal des Sciences Hydrologiques

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Abstract

Stream channel development in response to the eruption of Mount St. Helens on 18 May 1980, resulted in some of the largest sediment yields documented anywhere on earth. Development of new channels on the 2.7 km3 debris-avalanche deposit in the North Fork Toutle River caused net erosion of as much as 1.3 X 105 t km-2 annually. The principal effect of the blast on channels throughout the 550 km2 devastated area was the subsequent rapid delivery of sand- and silt-size sediment eroded from hillslopes. Since 1984, instability and sedimentation in lahar and blast-affected channels have been within the range of pre-1980 levels. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Rates and processes of channel development and recovery following the 1980 eruption of Mount St. Helens, Washington
Series title:
Hydrological Sciences Journal/Journal des Sciences Hydrologiques
Volume
34
Issue:
2
Year Published:
1989
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
115
Last page:
127
Number of Pages:
13