| Abstract: | The paper deals with hydraulic problems, arising with the development of geothermal deep ground-water flow. It begins with a brief comment upon the most important principles of flow, regarding the influence of temperature of water. Further it is explained what kind of hydraulic investigations on deep boreholes are necessary and how they have to be done.Finally, it will be reported about hydraulic investigations on particular geothermal water resources in Austria. Results of a pumping test, made at a deep well and lasting 15 months, show that by thermohydraulic investigations, particularly in connexion with geophysical measurements, fundamental statements can be made about available geothermal resources of the earth's crust for the technical planning and economic working of a geothermal energy production plant. The paper ends with a brief report about experiences made with the first geothermal heat supply plant that has been installed in Austria (Waltersdorf/East Styria). |
