139 7. Hydrogeological flow logging and dye tracer tests on the Hydrogeological Experimental Site flow velocity. However, between 88 and 90 m depth, a clear water inflow is detected within the screen, confirmed by the flow log. This inflow is also associated with a temperature increase between 86 and 90 m. A second inflow within the screen is identified between 78 and 80 m. Borehole M19 is fully screened from 75.5 to 133 m depth (Fig. 7). The temperature log provides little information. On the flow log, a water inflow is identified between 116 and 118 m. At 82 m, another inflow causes the velocity to increase (>12 rps), although the transition from PVC screen to steel screen disturbs the measurement. The logs from borehole M20 (Fig. 8) record a main water inflow, clearly identified on both the temperature log and the flow log, between 86 and 88 m. The velocity derivative is typical of a localized inflow. The geological formation at this depth corresponds to a dolomitized limestone. Figure 7 M19 Flowmeters log with pumping in M19. Figure 8 M20 Flowmeters log with pumping in M20.
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