Run-Off - GCSE Biology Definition

Run-off is the movement of water, usually from rain or melting snow, that flows over the surface of the land instead of soaking into the soil. This water often ends up in rivers, lakes, or the sea. Run-off can carry soil, nutrients, and pollutants, which may affect water quality and aquatic ecosystems. In GCSE Biology, understanding run-off is important for studying the water cycle and the environmental impact of human activities on ecosystems.