Maybe eventually they should build several smaller dams instead of one big one, just enough for irrigation and water supply, considering the potential ecological balance of the whole region, rather than of just a narrow potential ‘reserve’.
It’s naturally a dry area, the south bank opposite Kherson is already almost a ‘desert’ with dunes, although with a long history - they say such ‘Pontic Steppe’ grasslands were where indo-european tribes originated.
Anyway, before grand plans, Ukraine has to control both sides of the river, so I suppose they’ll keep watching how hard the mud bakes this summer.