ABSTRACT

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. $S{e}_{5000}$) 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 (${\alpha }_{Opt}$). The results showed that the average scaling factor based on $S{e}_{5000}$ is closest to the average ${\alpha }_{Opt}$ . 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.

摘要

本研究的主要目的是缩放不同土壤的对数正态保水曲线。该方法需要参考曲线和特定抽吸中的水含量。这种方法中的比例因子等于特定抽吸中的水分的对数（例如$\mathrm{小号}{Ë}_{5000}$）在参考土壤中以相同的吸量吸取土壤中水分的原木量。对14种不同的土壤样品进行了评估。通过优化方法获得的比例因子评估通过该方法获得的比例因子（${\alpha }_{ØpŤ}$）。结果表明，平均比例因子基于$\mathrm{小号}{Ë}_{5000}$ 最接近平均值 ${\alpha }_{ØpŤ}$。通过本研究中提出的方法获得的保水曲线拟合到从对数正态模型获得的保水曲线，具有更高的精度。