The canton of Valais issues over 300 drilling permits a year, two-thirds of which are for geothermal projects. However, these are predominantly for shallow geothermal uses (geothermal probes and groundwater heat pumps). As such systems become more widespread, spatial planning and neighborhood conflicts at the parcel level are increasing sharply. Specific gaps in knowledge are now being identified both within the canton and in the municipalities, which is currently making it extremely difficult to process applications for deeper drilling (>= 1,000 m) or to promote planned geothermal projects in the public interest. One example is the project by Geothermie Brig-Glis AG, which aims to heat the districts in the municipality with hot water from a depth of 1,000 meters. After a feasibility study and despite a low risk to public safety thanks to the direct groundwater extraction options, the project remains pending. This is regrettable because the Brig-Glis geothermal project could act as a "flagship project" and trigger a new generation of geothermal projects in the Rhone Valley. Consideration of the deeper geothermal potential should therefore be consistently included in the energy planning of the municipalities. A primary goal is to close knowledge gaps regarding the hydrogeological process understanding of geothermal systems at a regional level. To achieve this, the canton of Wallis tasked the AUG (Scheidler, S., Dresmann, H., Epting, J.) and hydrogeology research group (Schilling, O.S.) to develop a regional scale thermohydraulic model based on regional groundwater flow and heat transport simulations.