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| | Abstract | | Internal structures of tumuli (monumental tombs), especially the unexcavated ones, tell us the ages and cultural background of the ancient architectures. Due to the heavy vegetations on the unexcavated tumuli, the ground penetrating radar cannot be applied for the nondestructive exploration. Instead, the electrical resistivity tomography (ERT) is used to investigate the properties of the buried artificial structures. However, the internal structure is unknown in general, and the interpretation of resistivity structure cannot be proven. Here, we applied the ERT method to a tumulus, which was moved from the original location and reconstructed in a park recently. The internal structure is known, so that we can compare the obtained resistivity structure and the materials in the tumulus. As a result, the stone hut with rock blocks indicates the resistive feature, while the surrounding soil (especially the adjacent parts to the stone hut) is relatively conductive. It can be interpreted that the most of rain water soaked in the tumulus cannot be directly intrude into the tumulus, and the water saturation becomes high at the side of stone hut. We also applied the ERT to another unexcavated tumulus, and found the location of stone hut and other structures. |
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