Temporal characteristics and controls on landsliding in glacial tills

S. Nawawitphisit, D. N. Petley, N. J. Rosser, M. Lim, M. Brain, S. Waugh, A. Clark, C. Longley

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This investigation seeks to examine the conditions that lead to hysteresis in landslide movement in response to pore-pressure changes in a glacial till landslide complex. Fieldwork has been conducted to understand the relationship between pore-pressure change and the resultant movement rate and style. The study area is a north-facing coastal bluff containing materials comprising of a sequence of glacial deposits. The resulting landslide complex displays seasonal movements, associated with rotational failures, sliding and deterioration of the failed mass into complex mudslides. Movement is dominated both by ground water variations from precipitation inland, and marine undercutting of the toe. A 200 m section of the complex landslide at Upgang beach in Whitby, UK, has been intensively instrumented in order to understand the conditions under which the landslide movement initiates and then subsides. Initial results indicate that while creep occurs continually at the upper section, rotational slips are dominant during periods of high groundwater level. More needs to be done to have a better understanding of the hysteresis relationship between groundwater level and rate of movement. This paper is merely the starting point. Moving forwards, more heavy and intensive rainfall events need to be recorded before further analysis and conclusions, if any, can be achieved.

Original languageEnglish
Title of host publicationLandslides and Engineered Slopes
Subtitle of host publicationProtecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012
EditorsErik Eberhardt, Corey Froese, A. Keith Turner, Serge Leroueil
PublisherCRC Press/Balkema
Pages969-974
Number of pages6
ISBN (Print)9780415621236
Publication statusPublished - 1 Jan 2012
Externally publishedYes
Event11th International Symposium on Landslides and 2nd North American Symposium on Landslides, 2012 - Banff, Canada
Duration: 2 Jun 20128 Jun 2012

Publication series

NameLandslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012

Conference

Conference11th International Symposium on Landslides and 2nd North American Symposium on Landslides, 2012
CountryCanada
CityBanff
Period2/06/128/06/12

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