Scaling lognormal water retention curves for dissimilar soils

The main objective of the present research is scaling lognormal water retention curves for dissimilar soils. This method requires a reference curve and the amount of water content in a particular suction. The scaling factor in this method equals the log amount of moisture in a particular suction (e.g. Se5000) in the reference soil to the log amount of water content in the same suction in the soil. The proposed method was evaluated for 14 different soil samples. The scaling factor obtained by this method was evaluated by the scaling factor obtained from the optimization method (αOpt). The results showed that the average scaling factor based on Se5000 is closest to the average αOpt . The water retention curve obtained by the method presented in this research is fitted on the water retention curve obtained from the lognormal model with superior accuracy.