Development of Soil Moisture Content and Soil Matric Suction Model Based on Field Instrumentation and Electrical Resistivity Imaging (ERI) for Highway Slopes Constructed on High Expansive Clay Soil

In highway slopes (HWS) constructed on high expansive clay soil (HECS), in situ moisture variation is an environmentally driven variable that can significantly impact the safety of soil. Electrical resistivity imaging (ERI) a non-destructive method with considerable potential for subsurface mapping, which be correlated volumetric content (VSMC) and matric suction (SMS) HECS to remarkably enhance evaluation performance HWS. However, limited datasets are available evaluate accuracy feasibility correlative field-based models under various field conditions. The objective current study develop model VSMC SMS using real-time monitoring ERI data. Six HWS located Jackson metro area Mississippi (MS), USA were considered as reference this study. Comprehensive instrumentation was executed at six monitor VSMC, rainfall intensity. sensors installed crest, middle toe slope. 2D test conducted dipole–dipole array multiple electrodes 5 ft (1.5 m) spacing. survey crest image continuous profile terms variation. developed indicated good agreement between instrumented will facilitate estimation variations aid built such Yazoo clay.