An Improved Predictive Model for Determining the Permeability Coefficient of Artificial Clayey Soil Based on Double T₂ Cut-Offs

Table 4

The determination coefficient (R²), mean absolute error (MAE), and root-mean-square error (RMSE) values of the improved Timur–Coates (TC) model and typical TC model.

Model	R^2	MAE	RMSE
Improved TC model	0.999	1.050	1.370
Typical TC model	0.957	3.096	3.828