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- W1970258653 abstract "The success of a tracer test highly depends on the number and the localisation of the sampling wells. When preferential solute transport paths are expected, one needs to set up carefully the tracer test to recover information such as the local groundwater flow direction and an estimate of the transport velocities. In this work, we used electrical resistivity tomography (ERT) to monitor a saline tracer test. This experiment was performed in fractured limestones where high transport velocities and strong dilution effects were expected. This required a continuous injection and fast ERT acquisition. Two different salt concentrations (40 and 160 g/l) were injected to deal with dilution effects. We also tested the resolution and the depth of investigation of our dipole-dipole sequence by changing the electrode spacing. Two transversal (and a longitudinal) profiles were placed every 20 m from the injection well. During the first test, a maximum of -8 % (-16 % in the second) change of electrical resistivity was observed in the nearest ERT profile while no change occurred in the other ones. We were then able to estimate the transport velocities in addition to the local groundwater flow direction even if the dilution effects were important." @default.
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- W1970258653 date "2010-01-01" @default.
- W1970258653 modified "2023-09-25" @default.
- W1970258653 title "A Saline Tracer Test Monitored with ERT to Detect Preferential Flow/transport Paths in Limestones" @default.
- W1970258653 doi "https://doi.org/10.3997/2214-4609.20144789" @default.
- W1970258653 hasPublicationYear "2010" @default.
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