Article from 04.01.2023 | Last changed: 22.08.2025
Floods - how they form and how we influence them
… rain hits the earth's surface, part of it seeps into the soil and contributes to groundwater recharge. Another part is temporarily stored in the soil or evaporates, and … soil is already saturated with water from previous precipitation events, or the ground is frozen, most of the precipitation will run off at the soil surface. Soil … time. Steep valleys, channelised waterways, and a high degree of soil sealing, as found in many developed areas, favour rapid surface runoff. Small streams subsequently …