An Improved Prediction Method of Soil-Water Characteristic Curve by Geometrical Derivation and Empirical Equation

Table 6

Calculation of effectiveness of the prediction method.

Data resource	VG equation			Gardner equation			FX equation
	Sand (filter paper)	0.247	0.066	0.735	0.158	0.008	0.948	0.124	0.007	0.943
Silt (filer paper)	0.561	0.210	0.626	0.355	0.183	0.484	0.187	0.037	0.800
Clay (filter paper)	1.012	0.468	0.538	0.942	0.407	0.568	0.354	0.192	0.459
Sand [46]	0.758	0.308	0.593	0.790	0.146	0.815	0.129	0.117	0.097
Silt [47]	0.639	0.124	0.806	0.444	0.297	0.331	0.015	0.189	−11.694
Clay [51]	0.720	0.172	0.761	0.612	0.168	0.725	0.334	0.157	0.529