Vízügyi Közlemények, 1970 (52. évfolyam)
4. füzet - Rövidebb közlemények és beszámolók
Karaushev, too, attempted to relate width and depth of the channel [7]. The approximating estimation of the width of the low-water bed (B s e ) is made possible by the relationship At this width the required mean depth is ensured. In the above expression the subscript ,,p" refers to actual conditions, while ,,sz" to values pertaining to the regulated channel. In the paper by Vershbitzky [14] the correct selection of the regulated width is considered as one of the most important prerequisites, yet attention is called also to the importance of channel alignment. From observations under natural conditions and during laboratory experiments he found the bankline to follow a bi-clothoidal curve, from the properties of which it follows that the uniform increase, or decrease of the centrifugal force within the channel is ensured. River alinement is considered of primary importance for regulation by Garbrecht and Holtroff [4]. Th'ey believe in the possibility of establishing a basic hydraulic principle of general validity, which can be used for designing the alinement of rivers so that the solution yields a stable channel at the lowest possible engineering and financial effort. On the basis of theoretical considerations, laboratory studies and practical experience it is suggested to use hyperbolae for the center- and banklines of meandering rivers, with short straight stretches connecting tangentially at the transitions. A combination of theory and practical calculations is suggested in the paper by Kor das [9]. The results shown are believed to represent a preliminary experiment calling attention to the possible existence of a relationship between the classic problems of fluvial hydraulics and the achievements of research into the dynamics of open channels. Results of great interest are contained in the papers submitted on the subject of modern methods of river regulation. Andersen and Davenport [1] illustrate in their paper with reference to problems of navigation on a small river, the relationship between relative discharge, contraction width and depth on the one hand, and waterdepth as well as width in the original section, on the other, in terms of increasing discharges. For establishing the theoretical relationship and for finding the practical solution laboratory studies were performed by which they succeeded in demonstrating experimentally the conceptual correctness of submerging transverse structures. In two papers by Hungarian authors, Z orkóczy [15] and Laczay together with Zorkóczy [10], the history of regulation activities and a method of regulation aiming at the solution of a particular local problem on the same river section are described. In the first paper interesting and extensive regulation work is described which has been carried out in the 32
