In the literature, there are graphical (approximate) ways to estimate AEV from the soil water retention curve. I wonder, how can one more accurately estimate AEV according to its definition: the suction value at the transition from a saturated to an unsaturated state.
Assuming one has volumetric water content (VWC) vs. suction measurements from laboratory tests (HYPROP test), how can we leverage these values to estimate AEV?
Is it sensible to choose the suction value corresponding to the second largest VWC as the AEV?
Kindly take a look at my recently published article where we've introduced a new formulation incorporating the air entry value. To apply it, simply fit the experimental data points to the corresponding mathematical expression - equation 23 for volumetric water content, and equation 24 for saturation. You may conveniently access the article on ResearchGate
Article Modelling of soil–water characteristic curve for diverse soi...
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