Updating Soil Spatial Variability and Reducing Uncertainty in Soil Excavations by Kriging and Ensemble Kalman Filter

Table 1

Uncertainty reduction ratio in X displacements.

Excavation step	Conditional 1 CPT	Conditional 2 CPTs	Conditional EnKF	Conditional 1 CPT + EnKF	Conditional 2 CPTs + EnKF
1	0.8739	0.5060	—	—	—
2	0.8548	0.5568	0.4861	0.4085	0.2640
3	0.6921	0.5571	0.3368	0.2520	0.1827