The Fluctuations Of The Wisla

For those of you that remember, Poland's 2010 spring was defined by two things: the Presidential Plane Crash, and the Floods.  The floods (which apparently still happen in the notorious 'flash' form) caused billions of dollars in damages and were blamed, in part, on the work of beavers.  Now, Warsaw didn't really experience much of the floods, but there were warnings, especially for the zoo.  Warsaw lies about mid-point of the river, and the river's rise was cause for much spectacle.   (See the previous post here.)
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.