Abstract
Analysis of geothermal potential of the Muschelkalk deposits was carried out from the point of view of utilising hot groundwater in balneology and recreation. As a result of a number of analytical studies, the area situated in the southern part of the Polish Lowland was selected as one of prospective areas for the location of geothermal intakes. This area encompasses a southern part of the Fore-Sudetic Monocline, a southern part of the Łodź Trough, and a small section of the Miechowska Trough. The deposits are buried at depths of between 500 m b.s.l and 1500 m b.s.l., their thicknesses are from 100 m to 300 m, the temperature at the top in most cases is about 30 - 50 °C, TDS in most cases does not exceed 60 g/dm³, mineralised water flood tide is from 0.4 m³/h to 13.8 m³/h, porosity is between 9 % and 23 %, and permeability is from 25 mD to 340 mD. As a result of the analyses, the most favourable conditions for development of balneotherapy and recreation in the Muschelkalk deposits in the three locations of the selected area were found to be where the boreholes Trzebnica IG- 1 (first area), Wierzchlas 3, Rzeki IG- 1 (second area), and Trzonow 2 (third area), were located.
Highlights
The concept of utilising subsurface thermal brines has been developing since the 19th century
The conditions that must be met in order to use geothermal water for recreation and balneology include efficiency of the water intake, water pressure and a favourable depth of occurrence of the aquifer (Górecki et al 1996, Kępińska 2011)
The results of structural and parametric analysis for the pre-indicated area (Fig. 1) made it possible to identify the prospective location for geothermal intakes for balneology and recreational use
Summary
The concept of utilising subsurface thermal brines has been developing since the 19th century. There are 37 quite popular and traditional spas in the Sudety and the Carpathian Mountains, where mineral and thermal waters from drilling wells and springs are used. Never the less, these water sources in Poland seem to be insufficient, which suggests the need for more locations to be used as thermal brines in balneology and recreation. The conditions that must be met in order to use geothermal water for recreation and balneology include efficiency of the water intake, water pressure and a favourable depth of occurrence of the aquifer (Górecki et al 1996, Kępińska 2011). Increasing TDS raises the water’s viscosity, which, in turn, lowers the discharge (Górecki et al 2000, Bujakowski & Barbacki 2004, Barbacki 2010)
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