Predicting Soil-Water Characteristic Curves of Clayey Sand Soils Using Area Computation

Table 4

SWCC control points for sand-clay mixtures.

Mixture	Air-entry value (AEV), kPa	Residual water content (Wr), %	Saturated water content (Ws), %	Residual suction (Rs), kPa	R^2
Pure sand	8.6	0.8	11.5	700	0.997
5% Q	5.0	1.3	12.0	3800	0.988
10% Q	27.0	1.4	13.0	22000	0.957
15% Q	42.0	1.4	14.5	45000	0.978
30% Q	8.6	15.3	26.0	300	0.992
60% Q	11.5	22.0	35.0	700	0.988
100% Q	68.0	7.5	71.0	50000	0.991
5% B, 10% Q	30.0	1.9	16.0	25000	0.978
10% B, 5% Q	98.0	0.9	17.0	13000	0.973
15% B	170.0	1.2	22.5	10000	0.988