Duna waterlevels from 2002
I didn't remember flood in June, so checked out the data. Lighter blue is older data.
(The interactive Tableau dashboard of Danube water levels that lived here is gone — the hosting service shut it down and no archive captured it. The data pipeline behind it is in the gist below.)
I copied together the tables from Hydroinfo to a text file and added the year before each table. A light ETL to reformat webdata from to a TSV with date and value columns