American Society of Civil Engineers

Hydrologic Change Caused by the Eruption of Mount St. Helens

by William E. Branch, (US Army Corps of Engrs, Portland, United States)

pp. 531-538

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Document type: Conference Proceeding Paper
Part of: Irrigation and Drainage
Abstract: On 18 May 1980, the eruption of Mount St. Helens created a massive landslide which covered 32 square miles and stripped all vegetation from 150 square miles. A study of changes in hydrologic characteristics of the Toutle watershed show a dramatic decrease in time of concentration and an increase in the peak discharge frequency relationship.

ASCE Subject Headings:
Hydrologic aspects
Hydrologic models

Author Keywords:
Volcanoes - Watersheds
Hydrology Change - Volcanic Effects