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
78 Hidrológiai Közlöny (Hungarian Journal of Hydrology) 2017. 97. evt. 3. sz. Figure 11. Dike developments on the Hungarian side of the joint section THE HUNGARIAN ELEMENTS OF THE PROJECT ARE THE FOLLOWING Dike developments The development of the existing embankments meant that the heights of the dikes along the border were increased, in locations shown on the maps. These were done on border sections, where this development can have an effect in both countries {Figure 11). It is crucial for uniform flood protection in the region, which the development plans are done along the same directives, otherwise flood risk and hazard can vary along the non-uniform section (ENPI CBC HUSK- ROUA/lOOl/221 project 2013, ENPI HUSK- ROUA/0901/044 project 2013, Hungarian-Ukrainian joint Upper-Tisza flood development program 2013). Flood retention reservoirs The second Hungarian project element is the examination of further opportunities for flood retention, other than the already existing reservoirs, or the ones being currently constructed {Figure 12). This would roughly mean 150-180 million m3 capacity {ENPI CBC HUSKROUA/1001/221 project 2013). Such a capacity would help increase the general flood security in the region, helping to decrease the flood hazards along the Upper-Tisza. Figure 12. Reviewedflood retention reservoirs on the Hungarian side of the joint section THE JOINT ELEMENTS OF THE PROJECT They are probably the most important aspects of the flood development plans, as they contain several non-structural elements, which are crucial for a live transboundary cooperation: impact assessment impacts of structural developments development of the joint monitoring system. Impact assessment To be able to correctly assess the impact on the whole area, we had to build a complex database, containing both the Hungarian and the Ukrainian elements of the system. This required vast amounts of data harmonization, acquiring new data for previously blank areas, as well as discussions and negotiations with expert from both sides. The result was a new river model, covering the whole design area. This was necessary for the elaboration of the new design flood level, and for the complex analysis of the flood retention reservoirs. Flood retention reservoirs Preliminary risk assessments showed that with the development of the flood retention reservoirs and the construction of the dikes, the flood protection can be significantly improved of the section of the border that is of common interest. The joint effect of the actions sum up to about 1-1.5 m flood peak reduction in the Upper-Tisza region {Hungarian-Ukrainian joint Upper-Tisza flood development program 2013). The positive impacts of the developments extend over the border of Hungary and Ukraine, as they can be felt in Slovakia and Romania as well {Figure 13).
