'Worst case' modeling of a breach of the Nova Kakhovka Dam. It would result in a four or five meter wave striking the Antonovsky Bridge about nineteen hours after the breach simulated. The water will move like a flood over the lowlands as opposed to some sort of "rushing wave" though it's uncertain if the Bridge could withstand the impact as that was not part of the simulation. The wave will rise in level further down the river and will largely drown out the delta at the mouth of the river over the next two days. The flow will also surge up the Inhulets and Bug River, causing flooding in the Mykolaiv Oblast and city proper. But it would be the areas on the left bank (or southeast bank/ Russian controlled) of the river that would be most affected and would almost certainly result in deaths from the flooding.
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 floodin
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