| Abstract |
The development of the Smart City is determined by the use of information technology to increase the efficiency of the urban infrastructure and improve the inhabitants' life quality. An important element of the Smart City is sustainable economic development, which can be achieved, among other things, through the efficient use of the ground-rock medium for clean energy and the infrastructural development of the underground space. Thermal parameters of the ground-rock medium (subsoil), such as thermal conductivity, resistivity, and specific heat capacity are crucial for determining the very shallow geothermal potential (vSGP) of urbanised areas. Without this information, it would be impossible to correctly design thermoactive building components such as thermopiles, thermoactive foundations or energy tunnels, as well as to estimate the performance of heat pump systems based on ground-source exchangers. In addition, information on the thermal properties of soils(compressive strength Rc less than =600 kPa, according to ISO 14689) is essential in the design and prediction of the operating conditions of transmission infrastructures in the fields of energy, heat supply, fresh water, wastewater, etc. The Engineering-Geological Database (BDGI) is the country's largest and unique collection of digital data on engineering geology and geotechnical conditions in Poland. The database contains nearly 500,000 boreholes entered between 1998 and 2023, of which more than 35,000 are located in the area concerning this paper. The information gathered in the BDGI, i.e. borehole lithological profiles, groundwater depth, density and sample water content supported by additional field and laboratory studies, made it possible to semi-automatically generate maps of thermal properties of subsurface "at" and "to" the given depths of 2, 5, 10, 15, 20, 25 and 30 m BSL. The results of the studies and database analyses were presented in the form of tables, charts and sample maps for Warsaw. |