The funny thing with the Vistula, is that these days it seems to rise and drop almost daily. I visited the banks in spring to see the massive rise (and speed) in the river's flow, but also weeks later to see to subside to a more reasonable level. Then, I passed over it again and saw that the river had risen again. Now, going back over it, I can see the drop occurring again.
The river cresting this spring.
The river at more normal level.