Abstract
Highly resolved temperature records in a borehole in Western Georgia are applied and demonstrate several impacts during the registration of 15 months at depths of 100, 175 and 250 m. The long-term trend of the temperature at z = 100 m yields a surface temperature variation of 0.015 K/year which is going on since 90 to 110 years. It coincides with the settlement history where forest has been cut down to create cropland. Heavy rainfalls cause a water inflow to the borehole and change the water temperature at all depths by 0.6 to 1.3 K. The temperature equalization process results in the temperature diffusivity and thermal conductivity. Pressure-induced fluid flow is detected during the winter half year which is probably caused by regional subsurface water flow from the Caucasus mountains.
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Acknowledgements
The first author as recipient of a Young Scientists’ Research Grant №YS-2016-69 (“Assessment of climate changes on the territory of Georgia revealed by microtemperature variation in boreholes”) thanks the Shota Rustaveli National Science Foundation of Georgia (SRNSFG), Tbilisi/Georgia. We thank the anonymous reviewers for very constructive comments.
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Jimsheladze, T., Buntebarth, G., Kapanadze, N. et al. Stationary microtemperature borehole measurements and analysis of temporal impacts. Environ Earth Sci 80, 71 (2021). https://doi.org/10.1007/s12665-020-09353-0
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DOI: https://doi.org/10.1007/s12665-020-09353-0