Vízügyi Közlemények, 1970 (52. évfolyam)

4. füzet - Rövidebb közlemények és beszámolók

with the help of this model the characteristic quantities of sediment movement. The great volume of computation work was carried out using a medium capacity digital computer. The papers of S. Bruk and M. Miloradov provide examples for the sucessful use of mathematical models for these purposes. The influence of bed-load on channel configuration was studied on the basis of observations on Hungarian rivers by S. Somogyi [11], who prepared a classification system of section types for these rivers. The majority of rivers in Hungary was found to belong to the embedded meandering type. These conditions prevailed before comprehensive regulation already, but they were enhanced by regulation, during which the length of rivers was shortened and their slope increased. From the papers submitted to the symposium and reviewed above it may be concluded that these contain much valuable and interesting information and suggest many ingenious ideas (such as for instance the application of mathematical models to sediment transportation phenomena) for studying the influence of sediment on bed morphology. At the same time the authors indicated several uncleared problems which must be explored before the water management problems of the near future can be solved successfully. PAPERS REVIEWED IN THE REPORT 1. Rákóczi, L.: Experiments for the quantitative determination of bed-load transport by tracers (in Hungarian) 2. Csuka, J.: The influence of the Tiszalök river barrage on sediment- and bedconditions (in Hungarian) 3. Bransky, J. and Skibinsky, J.: The proportion of bed-load in the sediment volume transported over the middle section of the Vistula river (in Russian) 4. Hinrich, H.: Sediment transportation on the Rhine, Weser and Ems rivers, with data on measuring sites, equipment and evaluation of measurement results by means of electronic data processing (in German) 5. Herheulidze, S. S.: The hghest proportion of the solid phase in mud flows (in Russian) C. Snamenskaya, N. S.: The effect of point-bar sediment movement on bed development (in Russian) 7. Doucet,S.: Alternation of some detrital minerals (cassiterite, wolframite, beryl and zircon) during their transport by running waters. Migration and accumulation of the elements released during the alteration. Neoformation under surface conditions (in English) 8. Miloradov, M.: River bed deformation calculations based on field investigations (in English) 9. Bruk,S. and Miloradova,V.: Calculation of sedimentation in backwater-affected rivers with particular attention to the Danube upstream of the Djerdap (Iron Gate) high dam (in English) 10. Vincent, J.: Effect of local bottom deepening of the Danube river on water level descreasing (in English) 11. Somogyi, S.: Contributions to the relationship between the section-character and sediment transportation of stream channels (in Hungarian) 66