Article from 04.01.2023 | Last changed: 22.08.2025
Floods - how they form and how we influence them
… and how we influence them Flooded elbe river near Dessau Source: Jörg Rechenberg / UBA Floods are natural events, they form on a regular basis and are an integral part … (Figure 1). Figure 1: The emergence of surface runoff. Source: Matthias Rothe / UBA How much precipitation percolates and how much runs off on the surface depends … 45.1% of this urbanised surface is sealed, according to the Federal Statistical Office. In terms of total surface area, the share of settlement and transport is …