Nova Kakhovka dam

1. https://www.n-tv.de/mediathek/videos/politik/Flut-reisst-Hausdaecher-mit-Menschen-fliehen-in-Booten-article24174383.html
2. https://www.bbc.com/news/world-europe-65821052 "Who benefits from breaching the dam?"

But this action, whoever did it, now makes that option far more problematic.

The Dnipro was already a wide river by the time it reaches southern Ukraine and getting an armoured brigade across it, under Russian artillery, missile and drone fire would be extremely hazardous.

With the dam across it now breached and huge swathes of land downstream flooded the area on the left (eastern) bank opposite Kherson has effectively become a no-go area for Ukrainian armour.

Yes, and when the water is gone it is much easier to attack the Russians. So, the benefits are clearly on the Ukrainian side.