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... 77 Taking into account the EU Flood directive guidelines in this case meant the preparation of a common hazard mapping (SH/2/1 2015) that was implemented for the transboundary catchments, which show the need for the harmonization of the developments. Joint definition of the design flood level was successfully implemented after several years of cooperation. The cooperation also included the preparation of the combined DTM, harmonizing cross sections, considering future hydrological events a common definition of hydrologic-hydraulic scenarios Five examined shared sub catchments of the region • Ukrainian side of Batár • Tisza-Túrköz • Borzsa - Tisza left dike • Joint Bereg • Tisza-Szamosköz {Figure 7) Figure 7. Five shared sub catchments, which have specific projects THE UKRAINIAN ELEMENTS OF THE PROJECT ELEMENTS OF THE DEVELOPMENT PLAN Foundations for the updating of the Ukrainian flood development were also prepared as a joint task, ENPI being the provider of the necessary funds. This was led by the Ukrainian partner Ukrvod project {ENPI CBC HUSKROUA/1001/221 project 2013, ENPI HUSK- ROUA/0901/044 project 2013, Hungarian-Ukrainian joint Upper-Tisza flood development program 2013). Dike developments The program was prepared on the Hungarian side and on the Ukrainian side using a similar approach, suggesting a complex approach to increase the flood security. This means strengthening embankments, using mountain and lowland reservoirs and using non- structural methods. The dike developments on the Ukrainian side are along the border {Figure 8). Mountain reservoirs Another result of the harmonization of the flood protection development plans is the optimization of the mountain reservoirs {Figure 9). Previously there were 64 mountain reservoirs in the plan, this was optimized and rethought during the recent developments, as a result of which 39 reservoirs remain. Figure 8. Dike developments on the Ukrainean side of the joint section marked by the red lines These primarily serve to provide protection against local flash floods on streams and river tributaries. The hydrological parameters for each planned reservoir location are discussed in detail in the plans. Figure 9. An example of the analysed mountain reservoirs on the Ukrainian side of the joint section Lowland reservoirs In previous plans 24 possible lowland reservoirs were selected. With new surveys and methods this was optimized, and as a result of which 6 reservoirs were highlighted. Out of these 6 reservoirs, 4 are on the joint area, have a positive effect for both countries, and are a part of the joint program {Figure 10). These 4 have a capacity of roughly 130 million m3. Figure 10. The 4 Ukrainian reservoirs on the joint section
