Vízügyi Közlemények, 2001 (83. évfolyam)

3. füzet - Alžbeta Stančiková: A Duna szabályozása

470 Alz beta Stanciková Engineering) (Rákóczi, 1993; Goda, 1995; Neppel et al., 1999; Stânescu et al., 1999). The present study is the fifth in this line. The author is the co-ordinator of Project 6.2 on the Regulation of the channel of the River Danube". Results of this project are summarised in the Auxiliary Volume No. V/3 of the Danube Monograph, published in Bratislava (Pozsony) in 1999 (RZD, 1999). This volume, consisting of the work of the experts of 13 countries, is the first attempt (since the work of Tory, 1952) to summarise all river training and regulation issues of the River Danube. The study gives a historic review of the works of the Danube regulation, also defining the objectives and means of low-, medium- and high-flow regulation. This is followed — as the abstract of the Auxiliary Volume (RZD, 1999) — by the description of the recent river training and canalisation works of the Danube. High-flow regulation and the related flood-defence activities are illustrated by the examples shown in Figures 1—2. The open issues of design-flows and flood-defence concepts are also discussed. Figures 3—6 provides examples of medium-flow regulation works and structures. The design flows, serving as the basis of the planning of the above structures, are summarised in Table I for the Danube Reach upstream of the Croatian/Yugoslavian border. The study points out the earlier differences in the interpretation of design-flows in the various riparian countries and for the different river reaches. Low-flow regulation, serving the interests of navigation and the undisturbed release of floating ice, is an indispensable auxiliary element of medium-flow regulation. Certain Danube reaches are analysed in the study (Figure 7.), describing the structures (Figure 8) made with the consideration of regulation low-flow water levels (Table II.). These structure allow the gradual establishment of the desirable low-flow channel (Figure 9-11). The improvement of the channel, however will not always approach the desirable state: To illustrate this the number of days of insufficient water depth are shown in Table 111. for the river reach Kelheim-Bazias. On river reaches where the conditions of undisturbed navigation cannot be secured by low-flow channel regulation, this can only be achieved by the building of river dams. The existing and planned river barrages of the German and Austrian Danube reach are shown in Figures 12 and 13. Navigation can be substantially enhanced by the three man-made waterways: — the Main-Danube Canal, the Danube-Tisza-Danube canal of Yugoslavia and the Romanian Danube-Black-Sea Canal. Figure 14. illustrates the Danube-Main Canal schematically. * * * Die Regulierung des Donaubettes von Dr.-Ing. Alzbeta STANCÍKOVÁ, PhD. Die Zusammenarbeit der Staaten des Donaueinzugsgebiets wurde 1971 im Rahmen des Internationalen Hydrologischen Programms der UNESCO begonnen (Domokos 2001). Die Anzahl der teilnehmenden Länder war anfangs 8 und ist heute 13. Zweck der Zusammenarbeit ist die Erstellung von Publikationen, welche international abgestimmte, synthetisierte Informationen enthalten und bei der integrierten Entwicklung der Wasserwirtschaft des ganzen Donauraumes unerläßlich sind. Die hauptsächlichen Ergebnisse dieser Zusammenarbeit sind die 1986 erfolgte Herausgabe der Hydrologischen Monographie des Donaueinzugsgebietes sowie die Publikation von bislang 7 Folgebänden zur Monographie. Von diesen 7 Folgebänden wurden die Arbeiten an 3 Folgebänden von jeweils einem ungarischen Experten koordiniert. Sie wurden, mitsamt einem weiteren Band, der in Rumänien, unter ungarischer Mitwirkung erstellt