What is it about?

The relationship between the matric suction and the water content in the soil is known as the soil-water characteristic curve (SWCC). The SWCC is crucial for analyzing the shear strength, deformation, hydraulic conductivity, and aqueous diffusion of unsaturated soils. The drying SWCC is typically located above the wetting SWCC in a given plane. This phenomenon can be described by the hysteretic behavior of the SWCC. The determination of a complete set of hysteretic SWCCs involves measuring the matric suction and water content during wetting and drying processes. However, these measurements are time-consuming and costly, and the use of raw experimental data without a fitted model is impractical. Therefore, we developed a novel hysteretic model based on the Young-Laplace equation to address these issues. The model links the physical quantities at the micro-and macro-scale and accurately captures the main features of the SWCCs.

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Why is it important?

The shear strength, deformation, hydraulic conductivity, and aqueous diffusion , are related to the SWCC.


We will consider void ratio, grain-size distribution, and scanning curve in the future.

Yingpeng FU
Xi'an Jiaotong University

Read the Original

This page is a summary of: A Hysteretic Model Considering Contact Angle Hysteresis for Fitting Soil‐Water Characteristic Curves, Water Resources Research, April 2021, American Geophysical Union (AGU), DOI: 10.1029/2019wr026889.
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