Hidrológiai Közlöny 1947 (27. évfolyam)

5-8. szám - ÉRTEKEZÉSEK - JUGOVICS LAJOS: A torjai Büdöshegy hidrogeológiai viszonyai

XXVII. évf. 19Ifi. 5—8. szám. V HIDROLÓGIAI KÖZLÖNY 103 Ali results obtained are collected^in the „Collected Table'of Somé New Analytical Date of Somé Thermal Springs of Budapest."" Institute of Inorganic and Anajytical Chemistry, University of Budapest. State Hygienie Institute of Hungary, Budapest. ' >< MEDICINÁI SPRINGS OF BUDAPEST AND THEIR UTILIZATION. B

v L. DARVAS. (Hungárián text with fig. on p. 80.) - D. C. 613(43^. 151) :55l .49 Theories set up on the origi-n of Budapest medicinái waters are confronted and thé Author himself is of the opinion that juvenile Waters are mixed here with Karstwaters (from balcareo|JS rocks) and water from precipitations. He tries to establish the proportion of wate'rs of different origin on arithmetical and experimentál basis. Estimating the rainfall collecting area of the Budapest hot springs at 400.000 m

2, the yearíy rainfall at 500 mm and assuming thus a daily infiltration of 23.000 m

3, he fjnds it pei;missible to drill 4—5 new wells: Ali springs are not fully utilized. Springs of Szent Gellért Bath, well No. II of Szent Margit Isle and the Óbuda Árpád Spring are fully utilized, athers only up to 60—80% of their yields so that about daily 34.680 m

:! water are wasted. Completion cjf somé wells is defective. Wooden üners are unfit; the yield of the artesian well No. II of Szent Margit Isle has decreased recently from 210 m

3 to 45 m

3. Sudden reduction of pipe diameter is incorrect. Suggests to cement off the surface alluvial sands and g^avels of Sszént Margit Isle by the Schmidt process dowrí to a depth of 6 m and hopes to seize in tubing 5-M0 m

3 hot water which is now leaking through. This measure has been approved by the Technical Committee headed^by Prof. A. Vendl. The'Áuthor thinks it permissible to drill new artesian wells in suburbs of Budapest (Uipest, Kőbánya, Kispest, Pesterzsébet, fig. 1) in order to prővide there baths with medicinái water. The hot springs' on the north slope of the Gellért Hill a'ncf of the north end of Szent Margit Isle with their water temperature of 45° C are fit for'heating purposes. The Csárda' well in the - latter place has a daily yield of 13.000 m

3 and is to be used partly for heating. The Author proposes to convey hot medicinái water in pipe. liries to different parts of the City tb be used for therapeutic purposes free of charge. M . EXPERIMENTÁL WATER OUTPUT AND LEVEL GAUGING OF THE HOT SPRING OF THE ERZSÉBET BRINE BATH, BUDAPEST. By F. A. THOMA. (Hungárián text "with figs. and table on p. 84.) I). C. 532.57:551.496 At the hot spring of the Erzsébet Brine Bath a növel electrical water gauge was applied for metering. The apparatus consists of two sets of electrodes mounted on a board and sunk into the well tubing (fig. 1), forming a double electric circuit (fig. 2). Metering is done by volumomefcry-in which procedure the tubing itself is used as a gauge. Water output is measured by the time during which the water column rising in the tubing füls up tfie section of the tubing between the pairs of electrodes No 1 and No 2. With the arrangement water level oan alsó be measured. An advqntage of the system consists in the elimination of the errors of the old volumometric méthods, further in a convenient and quick execution of the measurement. >< DATA ON LUJZA-SPRING OF * BANKÓ-BATH. By S. SZIKLAY. (Hungárián text with fig. on p. 87.) - i>. C. 551.497(437.6) The most important well of the Kassa Bankó Bath is the Lujza-Spring. Its water is transparent, colourless, odorless; it contains 121 mg/l solid substances. Its chemical constitution is characterized by little free car^ bonic acid, carbonates, ^mall amounts of chlorides and sulphates; of cations: calcium, magnesium and alkali metals. The spring was tested during one year from July 1 1943. Variations of temperature and yield were recorded (fig. 1). Uniform variations of temperature and yield followed the changes of climatic conditions with more or less time lag. Sudden changes, fluctuations of temperature were caused only by melting of snow. * x HYDROLOGY AND MINERAL SPRINGS OF THE TORJA BÜDÖS MOUNTAIN. By L. JUG9VICS. (Hungárián text with figs. and tables on p. 88.) D. C. 551.49(498.4) :551.23 The southérn end the Hargita volcanic rangé is förmed by volcanic cones and ridges around Laké Szent Anna. The most interesting member of this volcanic group is the Büdös Mountain, famoufc for its gaseous exhalations and of its gasSy cave the Torja Büdös Cave. íhe mountain (figs. 1 and 2) forms an elongated erest, 1143 m high oversea, its base is built up of sedimentary rocks, chiefly sandstones with interbedded clay. This base rock is pierced by three volcanic chimneys of which the andesite mass building up'the summit is the most important. After cessation of the lave flow intensive postvolcanic action followed, known as fumarola, solfatara, and after erupüorfs had died away mofetta action followed which is still going on in an unusual strong way. Gases of the dry mofetta leak through the porous and craclAed andesite mass, more rarely along its contacts, to the surface. Chemically active gases are dissolved in rainwater, increase the dissolving capacity of the latter, widen cracks and fissures of the andesite rock and develop gassy caves of which three (Kis, Büdös, and Titnsós Cave) are known. Analyses of gases emanating from the caves are given on Table (made tyy Ilosvay, 1888—1893). According to IlQsvay's calculation an annual quantity of 1,448.000 kg carbondioxide and 4340 kg sulphuretted hydrogen is streaming to the surface. Gas escapes not only from the caves but everywhere through the andesite mass and along its contact through adjoining rocks. Gas has attacked the rocks of the Büdös Mountain, especially the andesite. On the Büdös Mountain the fellowing relationships may be observed between the circulation water, the occurence of springs, (fig. 3) and the quality of the rocks. No springs originate from andesite, f^om Carpathian sandstone few and poor springs originate, but marly clays form the mother rock of most springs. On the SW-slope of the Büclös Mountain between the summit and two lateral eruptions a large area is built up of marlylelay and all springs, except Alum springs, originate from this rock. r