Acute Sensitivity of Landslide Rates to Initial Soil Porosity

Date
2000-10-20
Authors
Iverson, Richard
Reid, M.
Iverson, Neal
LaHusen, R.
Logan, M.
Mann, J.
Brien, D.
Journal Title
Journal ISSN
Volume Title
Publisher
Altmetrics
Authors
Research Projects
Organizational Units
Journal Issue
Series
Abstract

Some landslides move imperceptibly downslope, whereas others accelerate catastrophically. Experimental landslides triggered by rising pore water pressure moved at sharply contrasting rates due to small differences in initial porosity. Wet sandy soil with porosity of about 0.5 contracted during slope failure, partially liquefied, and accelerated within 1 second to speeds over 1 meter per second. The same soil with porosity of about 0.4 dilated during failure and slipped episodically at rates averaging 0.002 meter per second. Repeated slip episodes were induced by gradually rising pore water pressure and were arrested by pore dilation and attendant pore pressure decline.

Description

This article is from Science 290 (2000): 513, doi:10.1126/science.290.5491.513.

Keywords
Citation
DOI
Collections