On the use of different constitutive models in data assimilation for slope stability

A recursive ensemble Kalman filter (EnKF) is used as the data assimilation scheme to estimate strength and stiffness parameters simultaneously for a fully coupled hydro-mechanical slope stability analysis. Two different constitutive models are in model: Mohr-Coulomb (MC) model Hardening Soil (HS) model. The framework allows investigation of effect behaviour on its ability factor safety using measurements horizontal nodal displacement at sloping face. In synthetic study, close-to-failure far-from-failure cases prior property estimations illustrate initial material distribution with models. results show that both provide reliable when selected close-to-failure. However, HS improved estimation case while this not MC addition, same level accuracy computational effort required comparatively less than