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Influence of a Nonionic Surfactant on the Water Retention Properties of Unsaturated Soils

^a School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332
^b Division of Hydrologic Sciences, Desert Research Institute, 755 E. Flamingo Road, Las Vegas, NV 89119

View larger version (34K): [in a new window]   Fig. 1. Relationship between the surface tension of water and the concentration of Triton X-100.

View larger version (26K): [in a new window]   Fig. 2. Soil water retention curves for (A) F-70 Ottawa sand and (B) Appling soil as a function of Triton X-100 concentration.

View larger version (16K): [in a new window]   Fig. 3. Relationship between the surface tension-contact angle scaling factor and the concentration of Triton X-100.

View larger version (37K): [in a new window]   Fig. 4. Predicted and measured soil water retention curves for F-70 Ottawa sand at Triton X-100 concentrations of (A) 0.075 g L-1 and (B) 0.75 g L-1.

View larger version (36K): [in a new window]   Fig. 5. Predicted and measured soil water retention curves for Appling soil at Triton X-100 concentrations of (A) 0.075 g L-1 and (B) 0.75 g L-1.

View larger version (60K): [in a new window]   Fig. 6. Root Mean Square Error (RMSE) values based on predicted and measured soil water retention data for (A) F-70 Ottawa sand and (B) Appling soil.