Sequential reduction of slope stability uncertainty based on temporal hydraulic measurements via the ensemble Kalman filter

Journal article (2018)

Authors

K. Liu Geo-engineering - CEG
P.J. Vardon Geo-engineering - CEG
M.A. Hicks Geo-engineering - CEG
Research Group
Geo-engineering (CEG) (TU Delft)
Copyright: © 2018 K. Liu, P.J. Vardon, M.A. Hicks
DOI
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https://doi.org/10.1016/j.compgeo.2017.09.019
Ensemble Kalman filter Data assimilation Spatial variability Random fields Finite elements Slope reliability
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Published Date

01-03-2018

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Geoscience and Engineering

Research Group

Geo-engineering

Abstract

A data assimilation framework, utilising measurements of pore water pressure to sequentially improve the estimation of soil hydraulic parameters and, in turn, the prediction of slope stability, is proposed. Its effectiveness is demonstrated for an idealised numerical example involving the spatial variability of saturated hydraulic conductivity, ksat. It is shown that the estimation of ksat generally improves with more measurement points. The degree of spatial correlation of ksat influences the improvement in the predicted performance, as does the selection of initial input statistics. However, the results are robust with respect to moderate uncertainty in the spatial and point statistics.