Figure 5
Hydraulic scheme (not in scale) of the experimental apparatus. The length of the S13 horizontal borehole is 190 m. (a) old analogic manometer; (b) hydraulic valve that is always open during the data acquisition periods; (c) hydraulic pressure sensor; (d) hydraulic valve not completely close to enable the measurement of temperature and electrical conductivity in the box (g); (e) temperature sensor; (f) electrical conductivity sensor; (g) transparent plastic container housing the temperature and electrical conductivity sensors; water is expelled when reaching about three quarters of the volume of the container.
