A worst case modelling for a russian demolition of the Nova Kakhovka Dnipro river dam show that the worst flooding will take place on the left (south east) side of the river bank. A 4 – 5 m wave will hit the Antonovsky bridge east of Cherson city after 19 hours, and there will be a backswell flooding up the Inhulets river, and after 4 – 5 days there would be some flooding up the river Bug to Mykolaiv. The demolition of the Nova Kakhovka dam is a war crime according to the Geneva Convention, but Russia has already systematically broken the Geneva convention during it’s illegal war in Ukraine.