The 2026 IHFC Summer School Izmir Heat Flow Value #
Sven Fuchs, Azul Senn, Ben Norden, Elif Balkan-Pazvantoğlu, Graeme Beardsmore, Gunel Gadirova, Michaël Thibault, Valeria Nogales Herrera, Reham Raafat, Renée Bernhard, Marios Karagiorgas, Tingting Zheng, Rosemary Sunny, Jeje, Abdalmajed Shlof, Miora Mirah Rajaobelison, Isabela Macias-Iñiguez, Tsegay Kunu Nguse, Piotr Słomski, Karlo Borko, Alberto Santamaria Barragán, Ali Berkay Tokel, Rafael Cottom, Doga Polat, Berat Utku Cicek, Sayed M. Sayed
Abstract #
During the IHFC Heat Flow Summer School 2026 in Izmir (Türkiye), participants generated a new heat-flow determination from a 160 m deep hydrogeological well. The workflow combined wireline temperature logging with laboratory thermal conductivity measurements on rock samples under both dry and water-saturated conditions. The resulting heat-flow value is the first quality controlled nearby with supporting metadata and is prepared for upload to the heatflow.world project portal.
Introduction #
Reliable heat-flow estimates require consistent temperature-gradient measurements and defensible thermal conductivity data, ideally accompanied by well-documented metadata. Shallow hydrogeological wells can provide valuable constraints on near-surface heat transport when logging and sampling are performed carefully. This project demonstrates an end-to-end, community-standard heat-flow derivation carried out as a hands-on training activity with summer school participants.
Objectives #
To produce a quality-controlled heat-flow estimate from a 160 m hydrogeological well by (i) acquiring a wireline temperature log to determine the temperature gradient and (ii) measuring thermal conductivity of representative rock samples under dry and saturated conditions to bracket plausible in-situ values. A parallel objective is to train participants in field acquisition, lab measurement practices, uncertainty awareness, and metadata completeness suitable for portal publication.
Expected Output #
A project entry containing: the processed temperature profile and derived gradient interval(s); thermal conductivity measurements (dry and saturated) with sample descriptions; the computed heat-flow value(s) with uncertainty/assumption notes; and complete project metadata (site context, methods, contributors, and funding acknowledgements).
Conclusions #
The summer school exercise produced a new heat-flow determination based on direct borehole temperature logging and paired dry/saturated thermal conductivity measurements, providing a defensible range for heat-flow calculation. The work yields both a publishable data product (with traceable metadata) and a repeatable training template for future field-based contributions. Once uploaded, the project will extend regional coverage in the portal and demonstrate good practice for community-generated heat-flow datasets.