Isolating advective signatures in temperature logs [Elektronische Ressource] / vorgelegt von Andrei Zschocke

Isolating Advective Signatures inTemperature LogsVon der Fakultät für Georessourcen und Materialtechnikder Rheinisch-Westfälischen Technischen Hochschule Aachenzur Erlangung des akademischen Grades einesDoktors der Naturwissenschaftengenehmigte Dissertationvorgelegt von Dipl.-Ing.Andrei Zschockeaus BerlinBerichter: Univ.-Prof. Dr. rer. nat. Christoph ClauserUniv.-Prof. Dr. rer. nat. Martin SauterTag der mündlichen Prüfung: 29.06.2007Diese Dissertation ist auf den Internetseiten der Hochschulbibliothek online verfügbar.AbstractGeothermics as a discipline of Geophysics deals with the description of the thermalregime, its variation in time, and the associated processes. These processes can bequantified by their characteristic thermal signature observed in temperature records.Heat transfer in the Earth’s crust occurs primarily by thermal diffusion. On the otherhand, heat advection due to groundwater flow in general is a more efficient transportmechanism. Therefore, the subsurface temperature field can be a sensitive indicatorof even small flow rates. The challenge is to isolate the desired thermal signaturefrom interfering signatures. This is achieved by eliminating the thermal signatures ofall other processes and factors from the temperature data which may be caused byheterogeneity of thermal rock properties, heat generation, and transient variations ofthe ground surface temperature.