Detection of Cylindrical Objects Using the GPR Method Based on Numerical Forward Modeling: A Case Study of the Buried Qanat

Ground penetrating radar (GPR) method has the capability to present high-resolution images of subsurface structures; however, the accurate interpretation for the response of subsurface buried targets and structures need the recognition and awareness of the response of various types of subsurface targets. One of the most common objects used as subsurface installation is the horizontal cylindrical target representing kinds of pipes. In the current study, a two-dimensional finite difference forward modeling method has been employed to simulate the GPR response of horizontal cylindrical synthetic models based on different conditions of the reality, in order to use for interpreting actual survey. Finally, the detection of the location of a buried Qanat located in the north-west of Shahrood city, as a case study, proved the effectiveness of the GPR method for this purpose.