Hidrológiai Közlöny 1949 (29. évfolyam)

5-6. szám - Kivonatok

Növel Water Sainpler for the Determination ot' Gases isi Solutioii. By K. Sarló, 1). Sc. (Hungárián toxt with £ig. OIV p. 152.) * ; ti. D. C. fi43.a7.0Sl.80/83 The new-wa'ter sainpler designed by the author is especiaMy snitabie for lifting water from different 1 nyers of atagnant water of 5—6 m. dopth. Tiie device meets all requirements of expert sampling: 1 st.: no dissolved gas is lost, 2 nd.: no atmospheric air or gas reaches the sample, 3 rd.: the determination 1 can be quiokly executed or preparad on tlie spot. The device is shown in the text figure. (Its essential g ^lements are: the aüuiminium container of about 2 1 it. Inapaciity, the c'ic niechanisin provoking the closure of the boltom valve and at last the arresting device of the latter preventing leakagp of water.) Déterm ination, par calcul. de la rugosité dans les essais sur modéles réduits. ' Par Gy• Kovács. (Text* lion®rois, fa«rares p. 1154.) [T. D. C. 531.43 : MB.3.001.57 r.a déterm nalion die la rngositó dans les essais snr modéles s'el'fectuait, a up. ara vaut moyenn:.nt des expériences préaiiables onéreuses. De ce fait, on a oherché a résondre le probléme d'une maniére mathématiquo p. ex Szily : f' = L'auteur, en se basant sur la formuile de Ohézy, départ du rapport des oarrées de vitesse existant en'tre la grandeur du modéle el la grandeur naturelle et en suibstituant la valenr de la résistanoe, du lit ii la formuJe de Mises fiait par obtenir l'équiation A 1 2 r « -v 1 ' A A l± + v~ 2 I r ! A dont la solution s'effectue a l'aide des aabques (fig. 1., 2., et 3.). Les íabaques servent á déterm ner les coeffieients multiplioateurs figuran't dans les merribres á additionner. Les abaques No. 1. 2 et 3 fournissent r eepecti vernem t la valeur de en fonction de la température celíe de 1 + fl 2 et de 2 H rx I

x ' 1 en fonction de X t Tl En term'iniant son étnde, l'auteur signale qu'on poursuit les essais sur modéles en vue de Vérifier la fonction j prise pour base ainsi que de corriger ses coeff leients. On structural Caves and Water-Ducts in the Mesozoic Bedrock of Dorog. By /. Venkovits(11 uugairian tfx't with figs. on p. 160.) .<; II. D. C. .-öl.491.5/8 |mi'lú Dorog) : 531.44 Coal extraoted from pits in Dorog is transported tio the tipple and screens through a tunnel system of 20.5 km. The tunnel network tráver.ses in many píaces the Mesozoic (Upper Triassic) ridge« and diiscovers cavitios, water ducts, caves förmed throughout geologic times in the deep bedrock. Oaves were inapped in detail by the author in 1947. Thoses discovered by mining openations are presented in fig. 1. The mine tunnel system discovered the following oavities and caves of whieh plans and sections are jriven in fig. 2—10. 1. Fracture-cave of mine No. X. distriot No. XI, Dorog. (Fig. 2.) 2. Cavern at 3136 m, seötiou of Dorog Tunnel. (Fig. 3.) 3. Cavern of the incline driven for drin'kwater eupply, Pit No. I, Dorog. (Fig. 4.) 4. Oave of Tolkod Tunnel, incline No. I, called ,.wet" incline. (Fig. 5.) 5. Cave of Old Tokod Tunmefl. (Fig. 6.) (i. Oave beside conipressor-roorn, Toko<l Tunnel. (Fg. 7.) 7. Oave of „A" pit. Tokod Mine. (Fig. 8.) 8. Oave of incline No. V, Tokod Tunnel. (Fig. <J.) 9. Oave of inclined pláne driven in rock, Ágnes l'it, Tokod Mine. (Fig. 10.) 10. Cave beside incline No. IV/b, water-gauging sta tion, Tokod Mine. (Fig. 10.) (Locations of the individual caves are numbered in fig. 1. with serial numbres used aibove.) In mapping the caves the following geoiogic observations were made: There are caves of following 3 types (origin): 1. Fracture (fault)-eaves. 2. Crevices following the bedding of rocks. 3. Caves produced by laggressive solvents. fairüy indupendent of tectonic struöture. 1. Fracture (fault) caves are presented in fig. 2, 5, 6, 7, 8, 9, and 10. Their waffis are always covered by <i coherent layer of crystals which can only have been precipitated from water filling up the crev'oe and n.ol from seeping run-off water. The clefts always strike uorlh-south and stretch to unknown depths. Tiie fraclures had been förmed previously and the cryatalline incrustat on couild be developed lafterwards under water on!y. This incrustation displays beautiful groups of aragonite, calcite &<• ervsials 'to the cave exiplorer. (Tahle I and II.) 2. Only one fissure follow ng the bedding of the rock was found. (Fig. 4.) Its origine is due to a weak zone of the strata >and to agressive soivent action. Tlie limestone of pulverulent surgary texture offered less resistance to the soivent along the pláne of strat fication than in a vertica] direction. Here again run-off water oannot have been the soivent. Surfaces of the crevice are not incrustated w th crystals. 3. A cave produced by agressive soivent is that piotured in fig. 3. It is more spaceous vertioally than horizontalíy. It deiveloped by the local action of an aggressive soivent emerging from great depth such as hot carbonic w'ater filling up the oavity. No crystalline inscrustation is present. The described caves have not been förmed by present précipitations (Karstic Water), but were produced in geolog c times through the action of thermal waters a'ong north-south fractures or cleaivnges along the Rtratification planes. La calcolazione del coefficiente udometrico con riguardo a l'invaso(Analisi deli' espressione del coefficiente udometrico secondo Puppini.) Dr- Ing. J- Bogárdi(Testo ungherose, tn'bellr e fiuuna rii 'trovano suHe p. 10:1.) TT. 1). C. 026.8Gl.OOi .2 Ned'la computazione del coefficiente udometrico gü investigatori italian i recentemente hanno presso in consideraziono anohe il fonomeno del l'invaso. II metode piú conosciuto é quelló del Prof. Ing. Puppin

;, il quale ha stabilito l'espress one (a a)

1'" q (litri/sec. ett) = 100 n — — vVn _ 1 prendendo in considerazione l'effetto deil' nvaso fiúi deflusso nei canali. In questa formula a ed n sono il coefficiente, risp. l'esponente nella equazione di possibilitá climatica de Montanari, o il coeff.ciente di de.191