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Correlation of Shallow Groundwater Levels with The Liquefaction Occurrence Cause By May 2006 Earthquake In The South Volcanic-clastic Sediments Yogyakarta, Indonesia
Eddy Hartantyo, Kirbani Sri Brotopuspito, Sismanto, Waluyo
Pages - 1 - 8     |    Revised - 10-05-2014     |    Published - 01-06-2014
Volume - 5   Issue - 1    |    Publication Date - May / June 2014  Table of Contents
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KEYWORDS
Earthquake, Liquefaction, Ground-water, Yogyakarta.
ABSTRACT
When a large earthquake hit Yogyakarta in 26 May 2006, several liquefaction events occurred in some places in Yogyakarta and surrounding areas. Liquefaction event is strongly influenced by the depth of the ground water in the area, as well as several other parameters. This paper will conduct a qualitative correlation between the observational data liquefaction after the earthquake and the measured groundwater depth.

A total of 493 water-table depths were directly measured in the southern part area of volcanic- clastic sediment by using a measuring-tape meter. Fairly high correlation is shown between areas with shallow water depth and the position of occurred liquefactions. The average water depth for liquefied soil is 2.05 m. Almost 90% of the study area showed a high potential for liquefaction to occur.
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Mr. Eddy Hartantyo
Geophysics, University of Gadjah Mada - Indonesia
hartantyo@gadjahmada.edu
Dr. Kirbani Sri Brotopuspito
Geophysics Sub Department, Faculty of Math and Natural Sciences University of Gadjah Mada Yogyakarta,55283, Indonesia - Indonesia
Dr. Sismanto
Geophysics Sub Department, Faculty of Math and Natural Sciences University of Gadjah Mada Yogyakarta,55283, Indonesia - Indonesia
Dr. Waluyo
Geophysics Sub Department, Faculty of Math and Natural Sciences University of Gadjah Mada Yogyakarta,55283, Indonesia - Indonesia