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

Table 2

Uncertainty reduction ratio in Y displacements.

Excavation step	Conditional 1 CPT	Conditional 2 CPTs	Conditional EnKF	Conditional 1 CPT + EnKF	Conditional 2 CPTs + EnKF
1	0.6936	0.6202	—	—	—
2	0.7244	0.5958	0.6106	0.4592	0.3914
3	0.7846	0.5669	0.4907	0.3757	0.3492