Tuchkovenko, Yurii S.Kushnir, Dmytro V.Ovcharuk, Valeriya A.Тучковенко, Юрій СтепановичКушнір, Дмитро ВалентиновичОвчарук, Валерія Анатоліївна2025-06-262025-06-262024Tuchkovenko Yu. Modeling the distribution of transformed waters of the Dnipro River in the Black Sea following the artificial flood caused by the Kakhovka dam destruction / Yu. Tuchkovenkо, D. Kushnir, V. Ovcharuk // Природничо-географічні дослідження рельєфу, клімату та поверхневих вод: сучасний стан та перспективи розвитку : матеріали міжнар. наук.-практ. конф. до 75-річчя кафедр землезнавства та геоморфології, метеорології та кліматології, гідрології та гідроекології (Київ, 2–4 жовт. 2024 р.). – Київ : Київ. нац. ун-т ім. Тараса Шевченка, 2024. – С. 54–55.https://dspace.onu.edu.ua/handle/123456789/41787On the night of June 6, 2023, Russian occupying forces blew up the dam of the Kakhovka hydroelectric power plant (HPP), which is located on the Dnipro River in the Kherson region of Ukraine. As a result of the HPP blowing up, there was an intensive leakage of water from the Kakhovsky Reservoir. As of 12.06.2023, 14.4 km^3 of water entered the lower Dnipro River, which formed 72% of the volume of water in the reservoir before the dam destruction (or 27% of the total volume of the average annual natural flow of the Dnipro, which makes up 53.5 km^3). According to rough estimates, water discharges through the dam opening in the first days after the dam destruction amounted to over 40000 m^3/s. The Black Sea consequently received many different types of pollutants, which were contained in the waters of the Kakhovsky Reservoir and in the sediment at its bed, and were also washed away by the water flow from the flooded areas of the lower Dnipro River (more than 2000 ha). Access to the coastal areas at the mouth of the Dnipro River and in the north-western part of the Black Sea (NWBS) is extremely limited due to military operations, and it is almost impossible to conduct field studies in the open sea. The main sources of information for assessing the spatial and temporal extent and specific features of contaminated river water distribution in the sea are data from remote satellite sensing of the sea surface and results of mathematical modeling. Numerical modeling of polluted transient water spread from the Dnipro-Bug estuary to the NWBS water area after dam destruction was performed. The simulation was carried out with the use of well-known numerical hydrodynamic model Delft3D-Flow Flexible Mesh (D-Flow FM). An unstructured computational mesh was generated for the model runs. The mesh covered the entire water area of the Black and Azov Seas and contained the high-resolution area for the NWBS region. In the vertical, the terrain-following σ-coordinate system was specified, which consisted of 7 vertical layers with non-uniform layer thicknesses.enDnipro Riverthe Kakhovka hydroelectric power plant (HPP)the Kakhovka damartificial floodpollutantpolluted transient water spreadhydrodynamic model Delft3D-Flow FMtransformed river waterswater salinityriver plumeArticle556.166https://orcid.org/0000-0003-3275-9065https://orcid.org/0000-0003-4556-0143https://orcid.org/0000-0001-5654-3731