Variability of Bimodal Soil-Water Characteristic Curves under Different Confining Pressures

Soils with two subcurves of Soil-Water Characteristic Curve (SWCC) (dual porosity soils) might be found within various residual soils. located in different depths have confining pressure. Residual soils are the unsaturated zones due to deep groundwater table. There is a linear correlation between hydraulic properties soil area and that its properties. This study aims examine influence pressure towards SWCC dual soil. The scope this involves measurements drying wetting using Tempe cells, plates, an advanced triaxial apparatus. In study, mathematical equations were developed explain effect on SWCC. experimental results indicated exhibits bimodal characteristics for curve it unimodal As increases, air entry values, inflection points, standard deviation increase. addition, hysteresis becoming smaller increasing