Temperature Fluctuations Accompanying Water Movement through Porous Media

Temperature measurements were made at localized sites in bentonite, kaolinite, and small glass beads during infiltration. The temperature of the medium was observed to rise gradually and then to drop sharply as the infiltrating water approached and reached the measurement site. Temperature fluctuations were observed to be about 9 degrees C for bentonite, 4 degrees C for kaolinite, and 0.1 degrees C for the glass beads.