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| | Abstract | | The present study has performed Time Domain Induced Polarization (TDIP) measurements at an irrigation test field, to demonstrate temporal change of resistivity and IP properties associated with water saturation change. Apparent resistivity and fullwave IP signal were measured before and after the irrigation test by the Iris Syscal Pro system injecting a 50% duty-cycle current with a pulse time of 2,000 ms. The inverted results estimated a significant decrease of resistivity and increase of chargeability below the irrigation point. In particular, the observed fullwave IP signal exhibited a gentler time-decay after the irrigation test, suggesting its feasibility to monitor groundwater infiltration process through a vadose zone. |
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