SEGJ Technical Conference

GPR survey around yoshinogari ruins, part2: A physical model tests for the estimation of anomaly shape.

Abstract The author carried out GPR experiments using the physical models to verify the cause of characteristic anomalies of GPR data which acquired from GPR survey at road neighboring to Yoshinogari Ruins. As a result of having reanalyzed the GPR data, I added 3 anomalies newly to 6 anomalies which extracted in previous report. I considered that these GPR anomalies might be reflection waves from Kamekan which were buried in Yayoi period. In the measurement experiments by GPR, I applied not an antenna of a central frequency 300MHz which was used to field survey but an antenna of a central frequency 2GHz to scale down the size of the physical model. I made several patterns of Kamekan model to reconstruct GPR anomaly K-1 by cutting expanded polystyrene and whittling it. And I buried the each model into soil of the laboratory and measured it from surface by GPR. The results of the GPR experiments suggested that the cause of anomaly K-1 had a possibility to be a D type Kamekan which cracked along longitudinal center and generated a level difference.