Vízügyi Közlemények, 1970 (52. évfolyam)
4. füzet - Rövidebb közlemények és beszámolók
the purely empirical, or completely theoretical and experimentally unverified relationships have been reviewed, coordinated, improved and interrelated in a manner to provide essentially more reliable methods by which problems in river regulation and related sediment transportation phenomena can be solved with a greater hope of success. The proceedings of this Symposium truly reflect the development outlined above, yet at the same time the shortcomings were also pointed out in the reports and during the discussions. A great number of not fully understood problems has been listed and directions for further research have been compiled to supplement and complete by further research the relationships generally applied so far. Three main groups of problems have been dealt with at the Symposium. The first group of problems, entitled „River Training" has been subdivided into the subjects of basic principles and methods of modern river training and the effect of sediment conditions on the development of river training methods. The second group of problems „Sediment Movement" has also been subdivided into two subjects, namely into the theory of boundary conditions of sediment movement, and into the influence of sediment conditions on bed morphology. The third group of problems dealt with the sedimentation of watercourses, lakes and ponds. The three groups of problems have thus been discussed in altogether five subjects. A summary of the above five subjects and the suggestions for further research will be enlarged upon in the following. A detailed account of the five subjects will be presented under separate headings by the general reporters of the Symposium on the basis of the papers submitted. 2 1. Basic principles and methods of modern river-training The problems associated with the principles and methods of contemporary river regulation could be introduced by the general remark that the requirements to be met by river regulation have been broadened and extended by many new äemands arising from the growing importance of planned water conservation and management. We cannot help but fully agree with the opinion voiced at the Symposium that the principles and methods of river regulation must to-day be selected on the basis of sediment transportation by the watercourse, since the development of the riverbed and the changes thereof are realized through the sediment carrying capacity of the v/atercourse. 2 A detailed list of papers submitted to the Symposium and of the references is attached to each of the papers compiled by the General Reporters. 8
