Hidrológiai Közlöny, 2017 (97. évfolyam)

2017 / 3. szám - MANAGING ENVIRONMENTAL RISKS - FLOOD PROTECTION EXPERIENCES AND COOPERATION IN THE DANUBE RIVER BASIN - Bálint Márton Zoltán: Multilateral efforts towards basin flood control along the Tisza River: The Hungarian-Ukrainian joint Upper-Tisza flood development program

Márton Zoltán Bálint: Multilateral efforts towards basin wide flood control along the Tisza River: The Hungarian-Ukrainian joint.

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100 years have greatly increased along the transboundary river section:- 0.35 cm/year in Tivadar- 0.73 cm/year in Vásárosnamény- 0.43 cm/year in Záhony.

The data series of the peak stages shows 9 different interval periods, where the average period length is 11.2 years. This average period length matches the 11.2 year period of sunspot activity (FETIV1ZIG and VIZITERV Consult Kft. 2004).

Figure 3. Areas affected by the cooperation in the Upper-Tisza region

Accumulation time in the region is extremely short; it is hardly more than a day. This is the time that is available for the flood protection teams to prepare for the unexpected and reach the areas in danger. This requires a new type of cooperation, where the experts of the different countries have to work together as one, each of the existing working groups have to have experts from each effected country. This also means that the flood defence plans and scenarios have to be more focused on the catchments, rather than on the countries. Several fully developed flood defence plans have to be elaborated, as the available time before the flood peaks is not enough to prepare full plans, they can only be adapted, based on the forecasted peak. The following diagram shows a schematic view of a fast rising flood event.

Figure 5. Illustration of the short accumulation time on the

Upper-Tisza section