How to calc a character moving a large quantity of water?

[GraveDigger84]

Feat in question:

My rage exploded.
And so did the river. It blasted away from me in every direction, putting me at ground zero of the detonation—curled up alone in a bubble of air, howling so loudly I could hear myself even over the roar of the torrent. Some part of me had reached outward . . . not just into the pool, but to the source of the river, deep down in the Underworld or maybe Yonkers, and I had pulled it up by its roots. Millions of metric tons of water roared through the cavern, flooding the pool, scouring the cliffs, surging over the river banks, and probably surprising a whole bunch of snakes bathing downstream. At last, the water crashed back around me, settling into its normal flow again

Character is controlling pretty much the entirety of the Elisson/The Saw Mill River. I thought it would be a KE calc but the speed is kinda ambiguous here.

 

[SatellaTheWoE]

searching up google i got this:

 

[GraveDigger84]

searching up google i got this:

Yeah I'd assume it would be a bit higher than 15 mph since it's not just the natural flow of the river, he's pulling it into the cavern with a lot of force

 

[SatellaTheWoE]

Yeah I'd assume it would be a bit higher than 15 mph since it's not just the natural flow of the river, he's pulling it into the cavern with a lot of force

you can take 15mph as a low ball, it should be fine in that case

 

[GraveDigger84]

you can take 15mph as a low ball, it should be fine in that case

So just a normal KE calc then with 6.71 m/s as the speed and whatever the estimated water mass is?

 

[Digital_Franz]

the estimated water mass is?

Millions of metric tons of water.

1 Metric ton = 1000 Kg.