Vízügyi Közlemények, 1937 (19. évfolyam)

3-4. szám - Szakirodalom

24 the same limits. From these considerations it follows that the density of gravel and sand layers consisting of uniform grains may vary between 0.3401 and 0.7405, without its beeing necessary to assume friction or adhesive force to exist in these layers. IX. TRAFFIC ON THE BALATON LAKE AND THE SIO RIVER IN 1936. By B. PATAKY. (Pages : 145—149.) The traffic to the harbours of the Balaton Lake increased all through 1936. Compared with the year of 1935, the passenger traffic grew by 11 per cent, and the good traffic by 87 per cent. Table I and figure 1 illustrate the traffic for each harbour separately. (The heads of Table I are : ordinal, harbour, number of persons departing, then stone cereals, and other goods in tons. Inscriptions of figure 1 in succession : persons arriving and departing ; registered and discharged goods in tons.) The monthly distribution of goods is shown in figure 2. Among these, stone predominates (white columns) ; it is carried from the quarries of the northern shore to the southern shore. Compared with 9600 tons in 1935, stone amounted to 17500 tons in 1936. On the lower reach of the Sió river, which carries the water of the Balaton Lake to the Danube with an outflow regulated by a sluice gate, the traffic was 18,000 tons. Figure 3 shows the water depths in the channel at present under dredging ; as can be seen, a depth of 18 decimetres was available for a great part of the year, but a real development of the traffic can be expected only when the canalisation of the river has been accomplished, allowing systematic navigation between the Balaton Lake and the Danube.