Vízügyi Közlemények, 1969 (51. évfolyam)
4. füzet - Rövidebb közlemények és beszámolók
(14) For purposes of numerical dimensioning the relationship f( d hl dt j has been developed and given in the readily handled form q—Q' — Лр> where £>' = 0.75?/ and Aq = 4 In <г'-ч о The problem of safety has also been examined. A method based on similar theoretical principles is presented, by which a factor of safety of 1.5 can be included. In this method and ÄQa = 2.07 In f /; is suggested. The main conclusions of the paper are summarized in the design graph illustrated in Fig. 12. From this diagram the main hydraulic effects controlling bank design can be determined numerically and in combination, or in the knowledge of the bottom velocity and the rate of level drop the permissible bank slope can be selected. In this investigation no attempt has been made at completeness, the aim having been only Lo present a few methods of dimensioning which may be regarded as novel both in approach and method. REGULATION OF THE UPPER DANURF Ry Znrkóczg, Zoltán, Civ. Engr. (For Ihe Hungarian text see pp. 54) The section of the Danube River within the Carpathian Basin, bounded by the mouth of the Morva River and Ihe village Gömjü, i.e., River Stations 1880 and 1700 km, is referred to as the Hungarian Upper Danube. Over this section meanwater regulation to create improved navigation conditions has been carried out from 1880 to 1896. During these regulation works a practically new bed lias been created with the help of parallel dykes along both banks. In the new main channel thus realized conveyance and navigation conditions improved significantly, but no stable regime was achieved. In order to prevent bed deterioration and to further improve navigation conditions large-scale low-water regulation works have been carried out between 1900 and 1940. The purpose of these measures was to create a correct and permanent main current line at times of low-water, to reduce losses from the main channel, so that the required waterdepth should be available to navigation even at low stages. For guiding the main current line transverse structures (spur dykes and groynes), while for reducing water losses branch closures have been constructed. After World War I, in 1927, a Common Technical Commission (hereafter CTC) has been established for guiding regulation work on the Upper Danube, which became a boundary river between Hungary and Czechoslovakia. Discounting the years of World War II the CTC has functioned successfully ever since. From 1945 to 1948 the meanwater regulation works destroyed during World War 11 were reconstructed and repaired, while from 1949 to 1963 the low-water regulation
