Hidrológiai Közlöny 1934 (14. évfolyam)

S. S. de Finály: Hydrological data of a salt water from Pestújhely

Hydrological data of salt water from Pestújhely 157 The list of the salt water occurences near to Budapest can be followed by a more important one. In the year 1932. the tenant of the strand bath at Pestszenterzsébet

3 vitéz ./. Földváry bored on the territory of the strand bath after freshwater and found in a depth of 30 m sulphurous salt water. The geological conditions of this territory were then detailedly examined by the geologic experts Pál Rozlozsnik, Dr. Ferenc Pávai Vajna and Dr. E. Róbert Schmidt and several smaller test borings were made in which the salt content of the water varied from 2 to 10 g pro liter originating of depths from 30 to 50 m. Finally a deep boring was located by Dr. Ferenc Pávai Vajna and salt water containing the most salt was obtained of a depth of 100 to 170 m, with traces of earth gas. The boring was further deepened to 330.70 m but no more salt water containing layers were found. My analysis stated that this water contained 13,38 g salt per liter, including 11,89 g NaCl. The earth gas coming with the water consisted according to my analysis 12.6% CH4, 4.5% CO* and the rest Ns>. It can yet be mentioned that Vilmos Zsigmondy describes (4) that at the boring of the Artesian well in Budapest, Városliget, much gas developed in the depth of 677 meters. This gas contained 31— 48%CH4. The before mentioned salt water yielding well at Rákospalota was detailedly examined in the year 1933 by the geologist István Ferenczi and the chemist Tibor Szelényi. The boring is 405 m deep and the water originates from a layer at 180—185 meters. The quantity of the water was 20 liters pro minute and that of the gas consisting chiefly (92.8%) of methane was 8—9 cubic meters pro day. The analysis of Mr. Szelényi stated a content of 7.3694 g total salts, of which 6.9624 g is NaCl. Its Br content is 0.0223, that on I 0.0059 g in 1 liter. (5) The series of these occurrences is now ended with the salt water at Pestújhely. I took the water samples at June 30-th 1933. At this time the water pumped of the pipes contained yet much silt and this is the cause why I could not examine the gases dissolved by the original water, oxygen, air, free CO2, agressive CO> or earth gas. The water sample taken of the pipes after the pumping from a depth of about 30 m contained much less NaCl than the samples which signs that final equilibrium was not yet reached at the time of my examination. From geological, hydrological and balneological points of view, however, the data of my analysis are very