A Geospatial Liquefaction Model.
earthquakes, such as the 2011 Christchurch, New Zealand earthquake have demonstrated the
significant damage potential liquefaction poses to communities. On the regional scale,
liquefaction hazard mapping is primarily dependent on the surficial geology to identify
liquefaction susceptible units and geotechnical soil data are used to account for the
variability within units. Ho... read morewever, these studies are costly, therefore not widely
available and do not report meaningful probabilities. Thus, there is a need to develop a
method of liquefaction hazard mapping that is dependent on globally available geospatial
data that can be used in rapid hazard mapping. Logistic regression and ROC curve
analysis were used to develop and validate a probabilistic geospatial liquefaction model
based on data from the 1995 Hygo-ken Nanbu earthquake in Kobe, Japan. The predicted
probabilities of the model successfully captured the spatial distribution of the
observed liquefaction features in Kobe. To assess the general applicability of the
model, the model was tested in Christchurch, New Zealand and the predictive performance
compared to a similar model developed in Christchurch and tested in Kobe. Overall
results suggest that on a regional scale, liquefaction occurrences can be assessed using
only globally available geospatial data.
Thesis (M.S.)--Tufts University, 2012.
Submitted to the Dept. of Civil Engineering.
Advisor: Laurie Baise.
Committee: Eric Thompson, and Richard Vogel.
Keywords: Civil engineering, and Geological engineering.read less