SEGJ Technical Conference

Resistivity monitoring of ground water recharge test by two different recharge ways

Abstract Resistivity monitoring of two groundwater recharge tests in a pyroclastic flow plateau were conducted to examine a method for understanding groundwater flow. The two-dimensional distributions of resistivity change ratio were obtained from 2-D constrained non-linear differential tomography of apparent resistivity data. At the groundwater recharge test of low intensity by sprinklers the resistivity change was confirmed in loam layer, whereas at the groundwater recharge test of high intensity by filled water was not. The possibility of partial water flow in loam layer was pointed out because the resistivity change was confirmed under the part in which the resistivity change was not confirmed. These results indicated the possibility of understanding more detailed ground water flow of loam layer by the recharge test of low intensity.