Changeable-Offset GPR Profiling for Loose Zones Detection in Levees

The paper presents using of GPR method for location of loose zones in the river embankments. The relationships between the existence of loose zones in the levees, their water-saturation and changes in the electromagnetic properties in the ground were discussed in the paper. There is proposed in the paper changeable-offset profiling, which gives wider possibilities in GPR detection of loose zone distribution in levees than standard, zero-offset, reflection profiling.